DE10352924A1 - Apparatus and method for the qualitative and / or quantitative analysis of ingredients in liquids, especially in beverage and process fluids - Google Patents

Abstract

The present invention relates to a method and a device for the qualitative and / or quantitative analysis of ingredients in liquids, in particular in process liquids and / or in alcoholic and non-alcoholic beverages, which are present in open containers or in closable or sealed containers or containers on which a pressure greater than, equal to or less than atmospheric pressure is applied, the container or container having at least one container wall, lid or bottom portion and / or closure which is pierceable by means of a flowmeter integrated in an infrared spectrometer ATR crystal. With this measuring device, liquids that are present in containers that have an increased internal pressure can also be analyzed under the actual conditions. Furthermore, the invention relates to a flow cell.

Description

The The present invention relates to an apparatus and a method for the qualitative and / or quantitative analysis of ingredients in liquids, especially in process fluids and drinks. Furthermore, the invention relates to the use of the inventions to the invention apparatus for the analysis of ingredients in liquids, such as beer, wine, spirits, mixed drinks, fruit juices, soft drinks, Milk and milk products, as well as a flow cell.

Not Alcoholic and alcoholic drinks are nowadays regularly in large-scale Equipment manufactured and usually fully automatic in cans or bottles bottled, closed and ready to ship. For industrial beer bottling plants can for example, every hour bottled about 80,000 bottles become. To ensure consistent quality of ready-to-ship product batches to ensure, are random samples at regular intervals ready to ship cans or bottles and to their characteristic Ingredients.

According to the DE 197 48 849 A1 Ingredients in aqueous systems in production plants can be determined by means of on-line measurement by IR spectroscopy if the analyte to be measured is subjected before the measurement to a chemical reaction which leaves the remaining constituents of the liquid sample unaffected. Furthermore, this requires that the change in the infrared absorption caused by the chemical reaction with the analyte be correlated to the analyte concentration to be determined. For example, such a chemical reaction may be reaction with an acid or a base. The in the DE 197 48 849 A1 However, the procedure disclosed is inevitably limited to those analytes which can be subjected to a chemical reaction in a targeted manner and which, moreover, remain measurable by infrared spectroscopy. In addition, this method is time consuming and in particular in the investigation of bottled beverages not practical, since due to the required sample preparation, the desired analysis result can often not be delivered in a timely manner.

In the DE 195 28 950 A1 discloses a device for analyzing in particular alcoholic beverages delivered in containers such as bottles or cans. Product-specific quality parameters are determined using density, sound, oxygen, carbon dioxide and color sensors. Alcohol, sugar, carbon dioxide and oxygen levels as well as the pH values of the beverage liquids to be examined should be determined by means of these sensors. For example, the density / sound sensor serves to carry out the determination of original wort and extract in beers. A disadvantage of the device and the method according to the DE 195 28 950 A1 is that in order to obtain reliable measured values always a temperature aggregate is provided to set the liquid to be analyzed to a temperature corresponding to that of the sensors. In addition, a large number of series-connected sensors are required in order to be able to query a sufficient number of product-specific quality parameters.

According to the GB 2 204 952 A Specific ingredients of beverage liquids can also be determined by gas chromatography. However, only very small sample volumes are accessible with this analysis method, which is why a large number of individual measurements are required to obtain a representative image. In addition, the required chromatographic column is often adapted to the respective analytical problem or the analyte to be measured. For this reason, the simultaneous measurement of polar and nonpolar substances regularly encounters greater difficulties or is not possible. Finally, due to the small diameter of the chromatography columns commonly used, only those liquids which are completely free of particles and suspended matter can be used. Alcoholic beverages such as beer or wine are therefore to be filtered prior to measurement and separated from any solid components. In addition, the measurement analysis of a gas chromatograph is also significantly disturbed by gas bubbles in the liquid to be examined, as they are often found in carbonated beverages.

It would be therefore desirable, to a device for analysis of non-alcoholic as well as alcoholic drink liquids To fall back on to be able to which does not suffer from the disadvantages of the prior art. Accordingly, the was The present invention has the object, a device available to make ingredients in beverage liquids easy and reliable quantitative and determine the quality without the result of the measurement the presence of e.g. Suspended particles or gas bubbles in the liquid is disturbed. Furthermore, the present invention was the object of a Device for a timely sample analysis in beverage production accessible to make a fast and reliable qualitative and quantitative Analysis of ingredients of drinks allows, resulting in an under Pressed, closed container are located.

• a) mindestens eine erste Probenentnahmevorrichtung zur batchweisen oder kontinuierlichen Entnahme von Flüssigkeit, insbesondere von Prozess- oder Getränkeflüssigkeit aus einem offenen Behältnis, umfassend mindestens eine erste Entnahmeleitung; und/oder mindestens eine Probenabzweigungsvorrichtung zur batchweisen oder kontinuierlichen Abzweigung von Flüssigkeit, insbesondere Prozess- oder Getränkeflüssigkeit aus einem Produktionsprozess, umfassend mindestens eine Abzweigungsleitung aus dem Produktionsprozess; und/oder mindestens eine zweite Probenentnahmevorrichtung zur batchweisen oder kontinuierlichen Entnahme von Flüssigkeit, insbesondere von Getränkeflüssigkeit, aus einem verschließbaren bzw. verschlossenen Behältnis oder Gebinde, umfassend mindestens eine Anstechvorrichtung, enthaltend mindestens einen Durchstoßdorn mit einem bewegbaren Dichtungsaufsatz oder einen Keg-Verschluss, zur Erzeugung einer abgedichteten Öffnung in dem Behältnis oder Gebinde, insbesondere in dessem Verschluss, über die die Flüssigkeit in dem Behältnis mit Druck beaufschlagbar ist, und mindestens eine zweite Entnah meleitung, zumindest bereichsweise angeordnet innerhalb des Durchstoßdorns oder beabstandet von dem Durchstoßdorn, die vorzugsweise bis zum Bodenbereich des Behältnisses einschiebbar ist,
• b) mindestens eine Durchflussmesszelle mit einem Eingang, der mit der ersten und/oder zweiten Entnahmeleitung und/oder Abzweigungsleitung von Getränke- oder Prozessflüssigkeit, und einem Ausgang, der mit einer Abflussleitung verbunden ist, umfassend mindestens einen ATR-Kristall mit einer Eintrittsfläche und einer Austrittsfläche für Infrarotmessstrahlung und einem Messweg auf der der zu analysierenden Flüssigkeit, insbesondere der der Getränke- oder Prozessflüssigkeit, zugewandten Seite des ATR-Kristalls, auf dem der Messstrahl mindestens einmal, insbesondere mindestens sechsmal, abgeschwächt totalreflektierbar ist,
• c) ein Infrarotspektrometer, umfassend mindestens eine Infrarot-Lichtquelle, insbesondere eine MIR-Lichtquelle, eine erste Spiegeloptik oder eine erste Lichtleiteroptik zur Fokussierung des von der Infrarot-Lichtquelle ausgesandten Infrarotmessstrahls auf die Eintrittsfläche des ATR-Körpers, eine zweite Spiegeloptik oder eine zweite Lichtleiteroptik zur Fokussierung des aus der Austrittsfläche des ATR-Körpers austretenden Infrarotmessstrahls auf einen Detektor, und mindestens einen Detektor und, in Wirkverbindung mit dem Detektor,
• d) mindestens eine computergestützte Auswerteeinheit und
• e) mindestens einen mit der Auswerteeinheit verbundenen Datenspeicher.

Accordingly, an apparatus for qualitative and / or quantitative analysis of ingredients in liquids, in particular in Prozeßflüs and / or in alcoholic and non-alcoholic beverages, which are available in open containers or in closable or sealed containers or containers under pressure greater than, equal to, or lower than atmospheric pressure, the container or container containing at least one Container wall, lid or bottom portion and / or having a closure which is pierceable found, comprising

• a) at least one first sampling device for batchwise or continuous removal of liquid, in particular of process or beverage liquid from an open container, comprising at least a first extraction line; and / or at least one sample branching device for batchwise or continuous diversion of liquid, in particular process or beverage liquid from a production process, comprising at least one branch line from the production process; and / or at least one second sampling device for batchwise or continuous removal of liquid, in particular beverage liquid, from a closable or sealed container or container, comprising at least one piercing device, comprising at least one piercing mandrel with a movable sealing attachment or a keg closure for generating a sealed opening in the container or container, in particular in its closure, via which the liquid in the container can be pressurized, and at least one second removal line, at least partially disposed within the piercing pin or spaced from the piercing pin, preferably to the bottom portion of the container is insertable,
• b) at least one flow measuring cell having an inlet connected to the first and / or second extraction line and / or branch line of beverage or process liquid, and an outlet connected to a drain line comprising at least one ATR crystal having an entrance surface and a Exit surface for infrared measurement radiation and a measurement path on the liquid to be analyzed, in particular of the beverage or process liquid, facing side of the ATR crystal on which the measurement beam is at least once, in particular at least six times, attenuated total reflectable,
• c) an infrared spectrometer comprising at least one infrared light source, in particular a MIR light source, a first mirror optics or a first optical fiber optics for focusing the infrared measuring beam emitted by the infrared light source on the entrance surface of the ATR body, a second mirror optics or a second optical fiber optics for focusing the infrared measuring beam emerging from the exit surface of the ATR body onto a detector, and at least one detector and, in operative connection with the detector,
• d) at least one computer-aided evaluation unit and
• e) at least one data storage connected to the evaluation unit.

The First and second sampling devices may be manual or automatic operate. For example, a sampling line can be automatic in a container with a beverage liquid to be analyzed introduced and be removed again after sampling to, preferably after a rinse, to be imported into another beverage container. The delivery unit for the removal of beverage liquid can e.g. represent a suction pump with the withdrawal line communicates. According to one another embodiment the sampling device can also be equipped with an automatic Sampler be equipped, the beverage containers to a sampling station approach leads and returned to the original position after analysis or but carried on to another parking position.

With the device according to the invention, containing the second sampling device, eg beverage liquids can be analyzed which are already in ready-to-sell packages, cans or bottles and in which an autogenous pressure prevails which is above atmospheric pressure. These are usually carbonated drinks such as non-alcoholic soft drinks or sparkling wine, sparkling wine or beer. However, containers are also suitable in which there is a negative pressure. The piercing device allows the supply of beverages from these sealed bottles and cans and other containers to a flow cell under the conditions prevailing therein. For example, suitable piercing devices may be designed to provide smooth and uniform transfer of beverage liquid to the flowmeter even at intra-container pressures of 10 atmospheres or more. The piercing is initiated by placing the movable seal attachment on a preferably smooth surface of the beverage container. Thereafter, the piercing device is placed under the pressure prevailing in the container interior, and the container wall is pierced with the piercing pin, so that there is a connection to the interior of the container. In this way, gases dissolved in the beverage liquid, for example carbon dioxide, are kept completely in solution. A sampling line can then eg by the piercing mandrel to form a abgedich double hollow cannula into the container. By downstream of the flow measuring cell is provided a device for maintaining the pressure, can be maintained by interacting with the device for charging the interior of the container with a pressure during the measurement in the analysis device, in particular in the flow cell, a pressure that solved an escape Prevents gases. This is possible, for example, by using a shut-off valve and a needle valve. The flow can be adjusted in this way within wide limits, for example, depending on the measurement times provided for the measurement and / or the available measurement volume, and may for example be at some Mil lillers per second or at a few milliliters per minute, but can also be liquid standstill mean. In the measuring device, in particular the flow measuring cell, for example, in the analysis of carbonated drinks usually a pressure of 2 to 5 atmospheres is maintained. Under these conditions, the carbonic acid dissolved in the drinks remains in solution and can be quantitatively measured. The shut-off valve makes it possible to stop the liquid under the working pressure without having to adjust the needle valve, thereby ensuring that different beverage liquid batches can be successively measured at the same pressure. If you want to work under normal pressure conditions, the device for maintaining the pressure, in particular the needle valve is opened accordingly.

Accordingly, it is preferable also a device for acting on the interior of the closable or sealed container or Canned with a pressure provided, in particular over the Tapping device, and / or at least one conveyor unit, in particular in Form of a suction pump, which is in operative connection with the first and / or second extraction line and / or the branch line is.

According to one another embodiment The invention provides that the ATR crystal for IR radiation is substantially transparent and at least partially a pressure-resistant and, in particular on the liquid to be analyzed facing Area, one opposite the liquid to be analyzed resistant, especially water-insoluble, Material comprises or consists of such.

One suitable ATR body has at least two plane, substantially parallel boundary surfaces and has a refractive index greater than that of at least one a boundary surface adjacent, to be examined medium, in particular larger or is equal to 1.5. The flat boundary surface of the ATR body has accordingly advantageously over a continuous, uniform measuring path or a measuring path along the or along the one measuring beam, for example, at least six times attenuated totally reflectable is.

Especially preferred is when the ATR crystal zinc sulfide, zinc selenide or Includes germanium. About that can out as ATR body materials too Sapphire, cadmium telluride, thallium bromide iodide, silicon, magnesium difluoride, cesium iodide, Silver chloride, calcium difluoride, potassium bromide and sodium chloride be used. This ATR body can in an embodiment be provided with a coating with a thickness that is less than the preferably half wavelength of the infrared measuring radiation used, especially with a strength from about 2 nm to about 25 μm. Suitable layers are e.g. such as diamond or polyethylene.

A another embodiment of the invention Provides that the ATR crystal has a consistency and / or thickness sufficient, a positive or negative operating pressure of at least 3 atmospheres, especially at least 5 atmospheres, to withstand.

A Further development of the device according to the invention is apparent also characterized in that the exposed to be analyzed beverage liquid area of the ATR crystal formed at least partially substantially flat is, wherein at least this flat area comprises the measuring path and essentially not horizontal, in particular with respect to Horizontal inclined or vertical, is aligned.

Under a substantially vertical orientation of the measuring surface of ATR crystal is also intended according to the present invention Such are understood to be slightly different from the vertical position is deflected, e.g. around 10 °. An inclined surface preferably faces the vertical an inclination of about 45 °. The ATR crystal points regularly one trapezoidal longitudinal cross section on, with the larger area of the opposite parallel crystal surfaces the facing medium to be examined.

In a further preferred embodiment, it is provided that the flow measuring cell comprises at least two larger-area longitudinal walls and smaller side walls, wherein the distance between opposing longitudinal walls on average about 0.1 mm to at least 5 mm, in particular at least 1 mm, and wherein in at least one of these Longitudinal walls of the ATR crystal is sealingly integrated. Of course, the longitudinal walls can also be at be arched at least partially to each other and in this way lie directly against each other and form a closed measuring cell. In addition, the interior of the measuring cell can be cylindrical or with a polygonal or irregular cross section.

The Flow cell has regularly over two opposite each other Longitudinal walls and four the longitudinal walls connecting narrow sides. It is advantageous if the flow cell is pressure-resistant is designed and e.g. To press of up to 100 atmospheres can withstand. As has been found to be particularly useful, at least to make a wall of the flow cell transparent, e.g. made of Plexiglas to allow a visual inspection during the measurement. For example, the ATR crystal can be made of food-grade gaskets. pressure-resistant and temperature-resistant material, e.g. the plastic Viton, or other polymer materials known to the person skilled in the art with the measuring cell be sealed. Advantageously, all lie support surfaces the ATR crystal, which come into contact with the sealing material, outside the optical measuring path or the measuring path. The dimensions of the Inside the flow cell and the flow velocity in the cell are expediently coordinated so that at least in the field of optical Measuring section no turbulent flows occur.

Accordingly draws an embodiment of the invention characterized in that the walls of the flow cell, in particular the main body the flow cell, made of a transparent glass or plastic material exist, in particular on the basis of, preferably impact-modified, Polycarbonate, polystyrene or polymethylmethacrylate.

When particularly advantageous has been found when the inlet opening for the supply line to the flow cell below the longitudinal axis and / or the line, on which the measuring path is located, and that the output port for the derivative from the flow cell above the longitudinal axis and / or the line, is located on the measuring section, is arranged. With this arrangement Is it possible, a laminar flow over the surface of the ATR crystal and complete or turbulence largely to prevent, which is only an undisturbed, especially continuous Measurement possible power. Also can be avoided in this way that the measurement through in the beverage liquid present gas bubbles or foam is disturbed.

Conveniently, one goes according to one preferred embodiment such that the input and output ports of the flow cell in each case in the region of opposing edges, in particular Side edges of the ATR crystal or spaced apart from each other opposite Edges are arranged.

From The advantage here is further, if the inlet opening of the flow cell below the line on which the lower edge of the ATR crystal lies, is arranged and that the output opening of the flow cell above the line on which the top of the ATR crystal lies, is arranged.

Especially Accordingly, preference is given to a Flow cell used, includes opposing ones first and second wall surfaces, being in the first wall surface one for Infrared radiation, especially MIR radiation, transparent ATR crystal sealing is integrated, which comprises at least two flat, substantially parallel boundary surfaces, one of which faces the interior of the flow cell and vertical can be aligned and makes available a measuring path on which an infrared measuring beam totally at least twice, in particular six times attenuated totally reflectable is, at least one entrance opening for the Supply line to the flow cell, which is below the longitudinal axis and / or the line on which the measuring path is located, at least one output port for the Discharge from the flow cell, above the longitudinal axis and / or the line on which the measuring path is located, and wherein the entrance and exit openings each at or spaced from the opposing ones Ends of the measuring path are arranged.

Accordingly, the object underlying the invention is further achieved by a flow measuring cell, comprising opposing first and second wall surfaces, wherein in the first wall surface for infrared radiation, in particular MIR radiation, transparent ATR crystal is sealingly integrated, the at least two level, substantially comprises parallel boundary surfaces, one of which faces the interior of the flow measuring cell and not horizontally, in particular vertically, and makes available a measuring path on which an infrared measuring beam is totally reflectable at least once, in particular six times attenuated, at least one input opening for the supply line to the flow cell, which is arranged below the longitudinal axis and / or the line on which the measuring path is located, at least one outlet opening for the discharge from the flow measuring cell, which is above the longitudinal axis and / or the line on which the measuring path is located is arranged, and wherein the inlet and the outlet openings respectively at or spaced are arranged from the opposite ends of the measuring path.

According to one further expedient embodiment it is envisaged that the ATR crystal will have a width of at least 0.2 cm, in particular of at least 1 cm, a length of at least 2 cm, in particular at least 5 cm, and a thickness of at least 2 mm, in particular at least 5 mm. Basically, the dimensions can be more appropriate ATR crystals vary widely. This is aimed the thickness of the crystal regularly after the requirements of compressive strength. At an operating pressure from e.g. 5 atmospheres can e.g. a crystal with a thickness of 5 mm are used.

includes the flow cell two large, opposing longitudinal walls the surfaces, Already an average distance of about 1 mm is sufficient, around a laminar flow guarantee to be able to.

A another embodiment The invention is characterized in that the IR light source a a continuous or a sea-wavelength spectrum emitting Represents light source. Such light sources are those skilled in the art e.g. known as Nernst pens and so-called Globare. Prefers is resorted to IR light source, the emitting electromagnetic radiation in the mid-infrared range, So in the range of about 2 microns to about 25 μm, in particular of 2.5 microns to about 12 microns.

According to one Variant is advantageously a downstream of the IR light source Means provided that a convergent measuring beam before hitting on the entrance area of the ATR crystal in a, in particular narrow, parallel beam transforms. For example, the convergent beam can be replaced by a off-axis Paraboloid mirror made in parallel and with a diaphragm as narrow Parallel beam imaged on the entrance surface of the ATR crystal become. The jet occurs perpendicular to the entrance surface of the Crystal one. In this variant, preferably one of a off-axis Paraboloid and optionally formed a plane mirror second optics used to the out of the exit surface of the ATR-crest emerging beam again divergent in the beam path of the spectrometer and adapt it to the optics.

According to an alternative embodiment, it is provided that the IR or MIR light source is a light source emitting one or more discrete wavelengths, in particular an infrared light emitting diode, a lead salt IR diode laser or a quantum cascade laser. Quantum cascade lasers, which are suitable for the measuring device according to the invention are, for example, from EP 0676 893 A1 as well as from the US 5,509,025 known.

Especially using parallel, narrow beams has the possibility opened, the width of the measurement window of the ATR crystal or the ATR crystal as such along the measuring path to less than 5 mm, in particular less than 2.5 mm.

A sees another alternative embodiment before that in the supply line to the flow cell at least a coarse particle filter is interposed. This coarse particle filter Helps to protect the measuring cell from damage and to protect pollution. An essential function of the coarse particulate filter is when piercing of the beverage container Keep chipped components away from the measuring cell. When suitable filters come here filter with pore size usually in the range of only 1 μm to about 0.1 mm in question. These filters are preferably made Stainless steel and are e.g. above Stainless steel pipes, Teflon hoses or others for food suitable tubing connected to the flow cell.

According to one Another embodiment of the invention provides that the infrared spectrometer represents a Fourier transform infrared spectrometer. That in the detector of the Fourier transform infrared spectrometer recorded interferogram, which is a superposition of all in the spectrum occurring wavelengths is recorded in the evaluation computerized by Fourier transforms into the frequencies of each oscillation disassembled. With the device according to the invention can be several ingredients in aqueous systems essentially Simultaneously determine with high sensitivity, speed and wave number precision.

Further can be provided that the data storage a database with characteristic analysis data for beverage ingredients to be analyzed contains.

A further embodiment of the measuring device is characterized from that the supply line to and / or the discharge from the flow cell respectively Has at least one flow meter. The flow meter allowed in feedback with the device for acting on the beverage container with a pressure, for example the shut-off and the needle valve, a constant flow of the liquid to be analyzed the flow cell.

The devices according to the invention can furthermore be equipped with at least one O ₂ sensor, in particular the flow measuring cell connected upstream, and / or at least one conductivity, pH, sound / density, color, and / or turbidity sensor, in particular the flow cell downstream.

Of further may also be provided at least one thermostatic unit for thermostating the liquid to be analyzed and / or at least a thermostating unit for thermostating the flow cell or the ATR crystal.

• – Bereitstellen einer zu analysierenden Flüssigkeit in einem Behältnis und Einführen mindestens einer ersten Entnahmeleitung in die Flüssigkeit zur batchweisen oder kontinuierlichen Probenentnahme und/oder batchweises oder kontinuierliches Abzweigen einer Flüssigkeit aus einem Produktionsprozess über mindestens eine Abzweigungsleitung zwecks Probenentnahme,
• – Transfer der Flüssigkeit über eine Leitung zu einer Durchflusszelle, enthaltend einen ATR-Kristall,
• – Einleiten eines MIR-Messstrahls in den ATR-Kristall, so dass der Messstrahl mindestens einmal, insbesondere mindestens sechsmal, an der Kristallfläche, die in Kontakt mit der zu analysierenden Getränkeflüssigkeit steht, entlang eines Messweges abgeschwächt totalreflektiert wird,
• – Leiten des aus dem ATR-Kristall austretenden Messstrahls auf eine Detektoreinheit,
• – wellenlängenspezifische Registrierung der Intensität des Messstrahls,
• – Abgleich des detektierten Absorptions- bzw. Intensitätsspektrums mit in einem Datenspeicher hinterlegten Referenzspektren in einer Auswerteeinheit, die in Wirkverbindung mit dem Datenspeicher steht, und
• – Ermittlung der An- bzw. Abwesenheit von zu analysierenden Inhaltsstoffen in der Getränkeflüssigkeit sowie gegebenenfalls
• – Ermittlung der Konzentration detektierter Inhaltsstoffe durch Abgleich der detektierten wellenlängenspezifischen Daten mit in dem Datenspeicher hinterlegten Referenzstandards.

The object on which the invention is based is furthermore achieved by a method for the qualitative and / or quantitative analysis of ingredients in liquids, in particular in beverage or process liquids, in particular with a device according to the invention, comprising the steps:

• Providing a liquid to be analyzed in a container and introducing at least one first extraction line into the liquid for batchwise or continuous sampling and / or batchwise or continuous branching of a liquid from a production process via at least one branch line for the purpose of sampling;
• Transfer of the liquid via a line to a flow cell containing an ATR crystal,
• Introducing a MIR measurement beam into the ATR crystal so that the measurement beam is totally reflected at least once, in particular at least six times, at the crystal surface which is in contact with the beverage liquid to be analyzed along a measurement path,
• Passing the measuring beam emerging from the ATR crystal onto a detector unit,
• Wavelength-specific registration of the intensity of the measuring beam,
• - Matching of the detected absorption or intensity spectrum with stored in a data store reference spectra in an evaluation unit, which is in operative connection with the data memory, and
• - Determination of the presence or absence of ingredients to be analyzed in the beverage liquid and optionally
• - Determining the concentration of detected ingredients by matching the detected wavelength-specific data stored in the data storage reference standards.

there can be provided that the liquid by means of a, in particular the flow cell downstream, conveyor unit, in particular a Intake pump, is transferred.

• – Bereitstellen eines verschließbaren und verschlossenen Behältnisses oder Gebindes, in dem eine Flüssigkeit vorliegt, auf die ein Druck einwirkt, der größer, gleich oder geringer ist als der Atmosphärendruck, wobei das Behältnis oder Gebinde zumindest einen Behältniswandungs-, Deckel- und/oder Bodenbereich oder einen Verschluss aufweist, der dichtend durchstechbar ist,
• – dichtendes Anlegen eines bewegbaren Dichtungsaufsatzes an der Spitze einer Anstechvorrichtung an den durchstechbaren Bereich,
• – Aufbringen eines Drucks in die Anstechvorrichtung, der gleich oder größer ist als der in dem Behältnis vorliegende Druck,
• – Durchstechen des durchstechbaren Bereichs mit einer Schneidvorrichtung in Form eines Durchstoßdorns oder einer Hohlnadel,
• – Einführen einer zweiten Entnahmeleitung in das Behältnis oder Gebinde, insbesondere durch den Durchstoßdorn oder die Hohlnadel, insbesondere bis nahe an den Bodenbereich des Behältnisses oder Gebindes,
• – Durchleiten zumindest eines Teils der Flüssigkeit des Behältnisses durch die Entnahmeleitung zu einer mit dieser Leitung verbundenen Durchflussmesszelle unter Druckbeaufschlagung mit einem Gas, insbesondere einem Inertgas oder Luft, über eine mit der Anstechvorrichtung verbundene Druckvorrichtung und/oder eine der Durchflusszelle nachgeschaltete Fördereinheit, insbesondere Ansaugpumpe,
• – Aufrechterhalten des Drucks in der Durchflussmesszelle über mindestens eine Druckhaltevorrichtung, insbesondere ein Absperr- und/oder mindestens ein Druckhalteventil, z.B. Nadelventil, im Bereich der Abflussleitung der Durchflussmesszelle,
• – Einleiten eines IR-Messstrahls, insbesondere MIR-Messstrahls, in den ATR-Kristall,
• – Durchleiten des IR-Messstrahls entlang eines Messweges durch den ATR-Kristall, so dass an der der zu analysierenden Flüssigkeit zugewandten Fläche des ATR-Kristalls mindestens eine, insbesondere mindestens sechs, abgeschwächte Totalreflektionen stattfinden,
• – Leiten des aus dem ATR-Kristall austretenden IR-Messstrahls auf eine Detektoreinheit,
• – wellenlängenspezifische Registrierung der Intensität des/der IR-Messstrahls/en,
• – Abgleich der detektierten wellenlängenabhängigen Absorptions- bzw. Intensitätssignale mit in einem Datenspeicher hinterlegten Referenzdaten der zu analysierenden Flüssigkeitsinhaltsstoffe in einer Auswerteeinheit, die in Wirkverbindung mit dem Datenspeicher steht, sowie gegebenenfalls
• – Ermittlung der An- bzw. Abwesenheit von zu analysierenden Inhaltsstoffen in der Flüssigkeit sowie gegebenenfalls
• – Ermittlung der Konzentration detektierter Inhaltsstoffe durch Abgleich der detektierten wellenlängenspezifischen Daten mit in dem Datenspeicher hinterlegten Referenzstandards.

Furthermore, the object underlying the invention is achieved by a method for the qualitative and / or quantitative determination of ingredients in liquids, in particular in beverages, with in particular a device according to the invention, comprising the steps:

• - Providing a closable and sealed container or container in which a liquid is present, which acts on a pressure which is greater than, equal to or less than the atmospheric pressure, wherein the container or container at least one Behältniswandungs-, lid and / or bottom area or having a closure which is sealingly pierceable,
• Sealingly applying a movable sealing attachment at the tip of a piercing device to the pierceable region,
• Applying a pressure in the piercing device which is equal to or greater than the pressure present in the container,
• Piercing the puncturable area with a cutting device in the form of a puncturing mandrel or a hollow needle,
• Introducing a second extraction line into the container or container, in particular through the piercing mandrel or the hollow needle, in particular close to the bottom region of the container or container,
• Passing at least part of the liquid of the container through the removal line to a flow measuring cell connected to this line while pressurizing with a gas, in particular an inert gas or air, via a pressure device connected to the piercing device and / or a conveying unit downstream of the flow cell, in particular a suction pump,
• Maintaining the pressure in the flow measuring cell via at least one pressure-holding device, in particular a shut-off and / or at least one pressure-holding valve, eg needle valve, in the region of the discharge line of the flow measuring cell,
• Introducing an IR measuring beam, in particular MIR measuring beam, into the ATR crystal,
• Passing the IR measuring beam along a measuring path through the ATR crystal so that at least one, in particular at least six, attenuated total reflections take place at the surface of the ATR crystal facing the liquid to be analyzed,
• Passing the IR measuring beam emerging from the ATR crystal onto a detector unit,
• Wavelength-specific registration of the intensity of the IR measuring beam (s),
• - Adjustment of the detected wavelength-dependent absorption or intensity signals with stored in a data store reference data of the liquid substances to be analyzed in an evaluation unit, which is in operative connection with the data memory, and optionally
• - Determination of the presence or absence of ingredients to be analyzed in the liquid and optionally
• - Determining the concentration of detected ingredients by matching the detected wavelength-specific data stored in the data storage reference standards.

Non-alcoholic beverages, such as milk, milk products, fruit juices or soft drinks, as well as alcoholic beverages, for example spirits, wines, mixed drinks or beers, can be qualitatively and quantitatively analyzed for their ingredients using the method according to the invention. Carbohydrates or saccharides, creatinine, carbonic acid, carbon dioxide, ethanol, methanol and proteins are examples of these ingredients, which can preferably also be determined almost simultaneously next to one another. Thus, with the device according to the invention with the aid of the flow measuring cell, for example, both the CO ₂ and alcohol content, as well as the concentration of extract and original wort in beer can be determined.

The IR light sources that emit discrete wavelengths may be eligible for investigation continuous, pulsed or according to one Multiplex scheme operated. Here are each preferably the wavelength-specific Intensities of the detected measuring beam stored and with a likewise deposited Reference spectrum read in for adjustment and by single value decomposition or neural networks.

Of the present invention was the surprising Understanding that for the first time in a simple and reliable way beverage containers from a, for example, fully automatic filling process manually or automatically taken and promptly qualitatively and quantitatively on their characteristic Ingredients can be examined. The measuring methods carried out with the devices according to the invention are characterized by extreme accuracy, sensitivity and reliability out. It has also proved to be particularly advantageous that also such drinks liquids be easily analyzed under the same high standards, in which gases, e.g. Carbon dioxide, are dissolved. Furthermore, it is possible to inventive device in a partially or fully automatic analysis robot or automatic machines integrate. This robot can e.g. random or in regular or predetermined intervals beverage containers remove from a filling line and to an analysis station, at which the piercing device applied to this container and stabbed can be. The determined analysis data can then immediately on e.g. be made available to a computer screen and enable In this way, faulty product batches within narrow limits too identify and keep the product committee low. Also can with Help of the device beverage containers according to the invention, not the required quality standards correspond from the filling line early diverted before, if appropriate, together with proper containers in present a transport container.

Further embodiments The invention will be described in detail with reference to the following figures described, without the invention to these particular embodiments limited should be. Show it:

1 a measuring device according to the invention in a schematic representation;

2 a schematic sectional view of a flow cell;

3 a flow cell in front view; and

4 an alternative embodiment of a device according to the invention.

The measuring device according to the invention 1 the in 1 illustrated embodiment comprises a piercing device 2 , a flow cell 4 , integrated in an infrared spectrometer 6 , a device 12 for maintaining the pressure in the measuring device, comprising the needle valve 14 and the shut-off valve 16 , as well as a flow meter 18 , In operative connection with the infrared spectrometer 6 standing evaluation and also in operative connection with these components data storage are in 1 not illustrated. The piercing device 2 has a sealing attachment 20 who can put you on a bottle cap. For example, the piercing device or the sealing attachment 20 be pressed with a suitable tool to the surface of the bottle closure sealing. One inside the seal attachment 20 located punch 22 is mounted sealingly and movably in this attachment and can create an opening in this closure with its cutting edge placed on the closure surface. Inside the puncture pin 22 is in turn a picking line 24 sealingly and movably mounted, through the interior of the piercing pin through into the bottle capped with a crown 88 can be introduced into the bottom area. For example, if the contents of the bottle are a carbonated beverage, the actual carbonation content may be determined by the sampling device being preceded by an inline cap prior to piercing the piercing pin through the cap Gas pressure, for example, a nitrogen or argon pressure, is applied, which is greater than the internal pressure in the bottle 88 , The inert gas is then, for example via the gap between the inner wall of the piercing mandrel and the outer wall of the extraction line in the bottle 88 pressed. In order to maintain this pressure, the sampling line becomes 24 through an upper sealing ring 26 in the piercing device 2 sealed. After having built up a suitable back pressure in the interior of the bottle with the inert gas, the shut-off valve 16 be opened to the flow through the flow cell 4 to start with sample liquid. With the help of the needle valve 14 prevents the pressure from falling too much after opening the shut-off valve. Also, with the help of the needle valve ensures that the pressure conditions in the bottle 88 do not change abruptly. The amount of the bottle 88 effluent liquid can flow through the flow meter 18 be readily ascertained. A portioned removal of sample liquid is achieved by closing and opening the shut-off valve, which can be controlled electromagnetically or pneumatically, for example.

2 is a schematic representation of a flow cell 4 and a part of the infrared spectrometer. The ATR crystal 28 is in this preferred embodiment with a trapezoidal cross-section and is arranged substantially vertically. 2 thus shows the ATR crystal and the flow cell 4 from above. The flow measuring cell is formed on the one hand by a first longitudinal wall 30 comprising the ATR crystal 28 , and an opposite, second longitudinal wall 32 as well as narrower side walls. In order to be able to follow already during the measurement that the liquid conducted through the flow measuring cell shows no turbulence but flows laminarly, eg the second longitudinal wall can 32 completely or partially transparent, for example made of Plexiglas be made. The infrared measuring beam is via a first mirror optics 34 comprising first and second deflecting mirrors 38 and 40 directed to the entrance surface of the ATR crystal and a second mirror optics 42 comprising the third and fourth deflection mirrors 44 and 46 directed to a detector, not shown.

3 shows a flow cell 4 comprising a first longitudinal wall 30 comprising the ATR crystal 28 , a second longitudinal wall 32 with a viewing window 48 from eg Plexiglas as well as four in each case in pairs opposite narrow sides 50 . 52 . 54 and 56 that form the interior of the flow cell. The ATR crystal 28 preferably covers only a part of the first longitudinal side 30 , in particular in a central location, starting from, leaving the inlet 58 into the flow cell and the outlet 60 from the flow cell can be positioned in the area of or near the edges of the ATR crystal 28 lie. In the in 3 The preferred flow cell shown is the ATR crystal 28 aligned with its the measuring liquid facing flat surface substantially vertically. The inlet 58 In this arrangement, it is preferably in the region of or below the line on which the lower edge of the ATR crystal lies. The outlet 60 On the other hand, it is preferably arranged in the region of or above the line on which the upper edge of the ATR crystal lies. For example, inlet and outlet may be mounted diametrically spaced from each other in a square or rectangular measuring surface of the ATR crystal. Due to the vertical arrangement of the measuring surface of the ATR crystal as well as the described arrangement of inlet and outlet of the flow cell 4 according to 3 manages to keep the ATR crystal free of particulate deposits even in continuous operation. In addition, the measurement is not disturbed by gas bubbles or foaming in the measuring liquid.

Particularly preferred is a flow cell 4 whose basic body, ie those elements which form the interior to be flowed through, is integrally formed. Particularly preferably, the base body is at least partially transparent in order to be able to follow directly in the flow measurement, whether the flow is still laminar or already has turbulence, which should be avoided in order to obtain reliable measured values. Particularly preferably, the entire base body consists of a one-piece transparent or translucent material, for example a polycarbonate or polymethylmethacrylate material. The main body can be obtained, for example, in such a way that the interior volume of the measuring cell from an outer wall of the Grundkörperohling worked out, eg milled, is. The entrance and exit openings can be easily drill, for example, in the non-milled area of the body. The interior recess created in the body is then sealed by an ATR crystal. To protect against mechanical influences and to increase the tightness of the base body with ATR crystal in a sheath, for example made of metal, can be given. Among other things, the ATR crystal can be permanently pressed against the base body with this construction.

4 shows a device extended by several components according to 1 , In addition to the second sampling device, comprising the piercing device 2 , the embodiment shown also has a first sampling device 62 with a first sampling line 64 , The removal device comprises a holder 66 for vessels containing a measuring liquid and a movable and controllable holding arm 68 to the post office the withdrawal line above a vessel and for insertion into the vessel. Furthermore, in 4 a branch line 70 indicated, branched off with the process fluid from a production process and the measuring cell 4 can be supplied. All removal and branch lines, for example, in a switching valve 72 be merged, so that can be used for different measurements on only one measuring cell. For the transfer of liquid from the open containers of the first sampling device or from the production process may refer to a conveyor unit 74 , For example, in the form of a suction, resorted to, preferably the measuring cell 4 is arranged downstream. Alternatively, the measuring liquid can of course also be conveyed through the measuring cell in a heavily powered manner and optionally via a return line 76 be transferred back into the production process or a (collective) container. Furthermore, as in 4 shown, the measuring device additionally via an O ₂ sensor 78 , a sound / density sensor 80 , a conductivity sensor 82 , a pH sensor 84 and a turbidity sensor 86 feature. The sound / density sensor is preferably used when the liquid is at rest. The oxygen, color, pH and conductivity determination, however, is usually carried out in the liquid stream.

The in the above description, in the claims and in the drawings disclosed features of the invention can be both individually and in any combination for the realization of the invention in their various embodiments be essential.

1

measuring device

2

piercing

4

Flow cell

6

infrared spectrometer

8th

evaluation

10

data storage

12

contraption for pressurizing

14

needle valve

16

shut-off valve

18

Flowmeter

20

sealing cap

22

By impact spike

24

second withdrawal line

26

upper poetry

28

ATR crystal

30

first long side

32

second long side

34

first mirror optics

36

second Sampling device

38

first deflecting

40

second deflecting

42

second mirror optics

44

third deflecting

46

fourth deflecting

48

window

50, 52, 54, 56

narrow sides

58

inlet

60

outlet

62

first Sampling device

64

first withdrawal line

66

tube holders

68

holding arm

70

branch line

72

switching valve

74

delivery unit

76

Return line

78

O ₂ sensor

80

Sonic / density sensor

82

conductivity sensor

84

pH sensor

86

turbidity sensor

88

bottle

Claims (34)

Contraption ( 1 ) for the qualitative and / or quantitative analysis of ingredients in liquids, in particular in process liquids and / or in alcoholic and non-alcoholic beverages, which are in open containers or in closable or closed containers or containers on which the pressure is greater , equal to or less than the atmospheric pressure, the container or container having at least one Behältniswandungs-, lid or bottom portion and / or a closure which is pierceable, comprising a) at least a first sampling device ( 62 ) for batchwise or continuous removal of liquid, in particular of process or beverage liquid from an open container, comprising at least one first extraction line ( 64 ); and / or at least one sample branching device for batchwise or continuous diversion of liquid, in particular process or beverage liquid from a production process, comprising at least one branch line ( 70 ) from the production process; and / or at least one second sampling device ( 36 ) for batchwise or continuous removal of liquid, in particular beverage liquid, from a closable or sealed container or container, comprising at least one piercing device ( 2 ), containing at least one piercing spike ( 22 ) with a movable sealing attachment ( 20 ) or a keg closure, for producing a sealed opening in the container or container, in particular in its closure, via which the liquid in the container or container pressurize cash and at least one second withdrawal line ( 24 ), at least partially arranged within the piercing mandrel ( 22 ) or spaced from the piercing pin, which is preferably inserted to the bottom portion of the container or the container, b) at least one flow measuring cell ( 4 ) with an input ( 58 ) with the first and / or second sampling line ( 24 . 64 ) and / or branch line ( 70 ) of beverage or process liquid, and an outlet ( 60 ) connected to a drain line comprising at least one ATR crystal ( 28 ) with an entrance surface and an exit surface for infrared measurement radiation and a measurement path on the liquid to be analyzed, in particular of the beverage or process liquid, facing side of the ATR crystal on which the measurement beam is at least once, in particular at least six times, attenuated totally reflectable, c ) an infrared spectrometer ( 6 ), comprising at least one infrared light source, in particular a MIR light source, a first mirror optics ( 36 ) or a first optical fiber optics for focusing the infrared measuring beam emitted by the infrared light source onto the entrance surface of the ATR body ( 28 ), a second mirror optics ( 42 ) or a second optical fiber optics for focusing the out of the exit surface of the ATR body ( 28 ) emanating infrared measuring beam to a detector, and at least one detector and, in operative connection with the detector, d) at least one computer-aided evaluation and e) at least one data storage connected to the evaluation unit. Contraption ( 1 ) according to claim 1, further comprising a device for acting on the interior of the closable container or container with a pressure, in particular via the piercing device (US Pat. 2 ), and / or at least one conveyor unit ( 74 ), in particular in the form of a suction pump, which in operative connection with the first and / or second withdrawal line ( 64 . 24 ) and / or the branch line ( 70 ) stands. Contraption ( 1 ) according to claim 1 or 2, characterized in that the ATR crystal ( 28 ) is substantially transparent to IR radiation and at least partially comprises a pressure-resistant and, in particular on the surface of the liquid to be analyzed facing, a resistant to the liquid to be analyzed, in particular water-insoluble, material or consists of such. Contraption ( 1 ) according to one of the preceding claims, characterized in that the ATR crystal ( 28 ) Sapphire, cadmium telluride, thallium bromide iodide, silicon, magnesium difluoride, cesium iodide, silver chloride, calcium difluoride, potassium bromide and / or sodium chloride, and in particular zinc sulfide, zinc selenide and / or germanium in the uncoated or, especially with a layer of diamond or polyethylene, coated state or consists of such a material. Contraption ( 1 ) according to one of the preceding claims, characterized in that the ATR crystal ( 28 ) has a consistency and / or thickness sufficient to withstand a positive or negative operating pressure of at least 3 atmospheres, especially at least 5 atmospheres. Contraption ( 1 ) according to one of the preceding claims, characterized in that the surface of the ATR crystal exposed to the beverage liquid to be analyzed ( 28 ) is at least partially substantially planar, wherein at least this flat region comprises the measuring path and is substantially not horizontal, in particular with respect to the horizontal inclined or vertical, aligned. Contraption ( 1 ) according to one of the preceding claims, characterized in that the flow measuring cell ( 4 ) at least two larger-area longitudinal walls ( 30 . 32 ) and smaller-area side walls, wherein the distance of opposing longitudinal walls is on average about 0.1 mm to at least 5 mm, in particular at least 1 mm, and wherein in at least one of these longitudinal walls ( 30 ) the ATR crystal ( 28 ) is integrated sealing. Contraption ( 1 ) according to one of the preceding claims, characterized in that the walls of the flow measuring cell ( 4 ), in particular the main body of the flow measuring cell, consist of a transparent glass or plastic material, in particular based on, preferably impact-modified, polycarbonate, polystyrene or polymethyl methacrylate. Contraption ( 1 ) according to one of the preceding claims, characterized in that the input opening ( 58 ) for the supply to the flow cell ( 4 ) is arranged below the longitudinal axis and / or the line on which the measuring path is located, and that the output opening ( 60 ) for the discharge from the flow cell ( 4 ) is arranged above the longitudinal axis and / or the line on which the measuring section is located. Contraption ( 1 ) according to one of the preceding claims, characterized in that the inlet and outlet openings ( 58 . 60 ) of the flow cell ( 4 ) each in the area each other opposite edges, especially side edges, of the ATR crystal ( 28 ) or spaced apart adjacent to these opposite edges. Contraption ( 1 ) according to one of the preceding claims, characterized in that the input opening ( 58 ) of the flow cell ( 4 ) below the line on which the lower edge of the ATR crystal ( 28 ) is arranged, and that the exit opening ( 60 ) of the flow cell ( 4 ) above the line on which the top edge of the ATR crystal ( 28 ) is arranged. Contraption ( 1 ) according to one of the preceding claims, characterized in that the ATR crystal ( 28 ) has a width of at least 0.2 cm, in particular of at least 1 cm, a length of at least 2 cm, in particular at least 5 cm, and a thickness of at least 2 mm, in particular at least 5 mm. Device according to one of the preceding claims, characterized characterized in that the IR light source, in particular the MIR light source, a a continuous or a multi-wavelength spectrum emitting Light source or one or more discrete wavelength (s) emitting Light source, in particular an infrared light emitting diode, a lead salt IR diode laser or a quantum cascade laser. Device according to one of the preceding claims, characterized characterized in that the IR light source downstream at least a means is provided for using a convergent measuring beam, especially narrow, parallel beam on the entrance surface of the ATR crystal strike. Contraption ( 1 ) according to one of the preceding claims, characterized in that the width of the measuring window of the ATR crystal ( 28 ) or the ATR crystal as such along the measuring path is less than 5 mm, in particular less than 2.5 mm Contraption ( 1 ) according to one of the preceding claims, characterized in that in the supply line to the flow measuring cell ( 4 ) at least one coarse particle filter is interposed. Contraption ( 1 ) according to one of the preceding claims, characterized in that the device for maintaining a pressure at least one shut-off valve ( 16 ) and / or at least one pressure-maintaining valve ( 14 ), in particular a needle valve. Device according to one of the preceding claims, characterized in that the infrared spectrometer is a Fourier transform infrared spectrometer represents. Device according to one of the preceding claims, characterized characterized in that the data store is a database of characteristic analysis data to be examined beverage ingredients contains. Device according to one of the preceding claims, characterized characterized in that this device is a beverage analyzer, in particular a beer analyzer. Contraption ( 1 ) according to one of the preceding claims, characterized in that the supply line to and / or the discharge from the flow measuring cell ( 4 ) at least one flow meter ( 18 ) having. Contraption ( 1 ) according to any one of the preceding claims, further comprising at least one O ₂ sensor ( 78 ), in particular the flow cell ( 4 ), and / or at least one conductivity, pH, sound / density, color, and / or turbidity sensor ( 82 . 84 . 80 ), in particular the flow cell ( 4 ) downstream. Apparatus according to any one of the preceding claims, further comprising at least one thermostating unit for thermostating the liquid to be analyzed and / or at least one thermostating unit for thermostating the flow cell or the ATR crystal. Method for the qualitative and / or quantitative analysis of ingredients in liquids, in particular in beverage or process liquids, in particular with a device according to one of the preceding claims, comprising the steps of: providing a liquid to be analyzed in a container and introducing at least one first extraction line into the liquid for batchwise or continuous sampling and / or batchwise or continuous branching of a liquid from a production process via at least one branch line for the purpose of sampling, - transfer of the liquid via a line to a flow cell containing an ATR crystal, - introducing a MIR measuring beam the ATR crystal so that the measuring beam at least once, in particular at least six times, at the crystal surface, which is in contact with the beverage liquid to be analyzed, attenuated along a measuring path totalre - directing the test beam emerging from the ATR crystal to a detector unit, - wavelength-specific registration of the intensity of the measuring beam, - Matching of the detected absorption or intensity spectrum with stored in a data storage reference spectra in an evaluation unit, which is in operative connection with the data storage, and - Determining the presence or absence of ingredients to be analyzed in the beverage liquid and optionally - Determining the concentration detected Ingredients by matching the detected wavelength-specific data with stored in the data storage reference standards. Method according to Claim 24, characterized that the liquid with the aid of a, in particular the flow cell downstream, conveyor unit, in particular a suction pump is transferred. Method for qualitative and / or quantitative Determination of ingredients in liquids, especially in Drinks, in particular with a device according to one of claims 1 to 23, comprising the steps: - Provide a lockable and sealed container or container in which a liquid is present, which acts on a pressure that is greater than, equal to or less as the atmospheric pressure, wherein the container or container at least one container wall, Lid and / or bottom area or a closure, the is sealingly pierceable, - sealing application of a movable seal attachment at the top of a piercing device to the puncturable area, - applying a pressure in the piercing device, which is equal to or greater than that present in the container Print, - piercing the pierceable portion with a cutting device in the form a puncture thorn or a hollow needle, - Introduce one second sampling line in the container or container, in particular through the punch or the hollow needle, especially close to the bottom area of the container or container, - Passing through at least part of the liquid of the container through the sampling line to a connected to this line Flow cell under pressure with a gas, in particular an inert gas or air, over a pressure device connected to the piercing device and / or one of the flow cell downstream conveyor unit, in particular suction pump, - Maintained the pressure in the flow cell via at least one pressure-maintaining device, in particular a shut-off and / or at least one pressure-maintaining valve, e.g. Needle valve, in the area of the discharge line of the flow cell, - Initiate an IR measuring beam, in particular MIR measuring beam, into the ATR crystal, - Passing through of the IR measuring beam along a measuring path through the ATR crystal, so that on the liquid to be analyzed facing surface of the ATR crystal at least one, in particular at least six, attenuated Total reflections take place - Lead the out of the ATR crystal emanating IR measuring beam onto a detector unit, - wavelength specific Registration of the intensity the IR measuring beam (s), - Adjustment the detected wavelength-dependent absorption or intensity signals with stored in a data store reference data to be analyzed Liquid ingredients in an evaluation unit, which is in operative connection with the data memory stands, as well as if necessary - Determination of attendance or absence of ingredients to be analyzed in the liquid and optionally - Detection the concentration of detected ingredients by balancing the detected wavelength-specific Data with reference standards stored in the data store. Method according to one of claims 24 to 26, characterized that the drink to be analyzed a non-alcoholic drink, in particular milk, milk products, fruit juices, soft drinks, or Soft drinks, or an alcoholic beverage, especially spirits, Wines, beers or mixed drinks, represents. Method according to one of Claims 24 to 27, characterized that the beverage liquid qualitatively and / or quantitatively on IR-active ingredients, in particular on carbohydrates or saccharides, creatinine, carbon dioxide, carbon dioxide, ethanol, Methanol, and / or proteins is examined. Method according to one of claims 24 to 28, characterized that the IR light sources emitting discrete wavelengths continuously, pulsed or according to one Multiplex scheme operated. Method according to one of Claims 24 to 29, characterized that the wavelength-specific intensities stored the detected measuring beam and with a likewise deposited reference spectrum for the purpose of comparison and read by means of Single value decomposition or neural networks are analyzed. Use of the devices according to one of claims 1 to 23 for the substantially simultaneous qualitative and / or quantitative analysis of ingredients, in particular of carbohydrates or saccharides, creatinine, carbonic acid, Koh dioxide, ethanol, methanol, and / or proteins, in non-alcoholic beverages, in particular milk, milk products, fruit juices, soft drinks, or soft drinks, or in alcoholic beverages, in particular spirits, wines, beers or mixed drinks. Flow cell ( 4 ) comprising opposing first and second wall surfaces ( 30 . 32 ), wherein in the first wall surface for infrared radiation, in particular MIR radiation, transparent ATR crystal ( 28 ) is sealingly integrated, comprising at least two flat, substantially parallel boundary surfaces, one of which faces the interior of the flow cell and not horizontally, in particular vertically, and makes a measuring path available on which an infrared measuring beam at least once, in particular attenuated six times totally reflectable is at least one entrance opening ( 58 ) for the supply line to the flow cell, which is arranged below the longitudinal axis and / or the line on which the measuring path is located, at least one outlet opening ( 60 ) for discharge from the flow cell located above the longitudinal axis and / or the line on which the measurement path is located, and wherein the input and output ports are respectively located at or spaced from the opposite ends of the measurement path. A flow cell according to claim 32, comprising one, in particular one-piece, body from a, in particular transparent or translucent material, in particular of a thermoplastic material which together bounded with the ATR crystal the interior of the measuring cell. Flow measuring cell according to claim 33, characterized that the main body from polymethyl methacrylate, polycarbonate, polystyrene and / or a Stryol copolymers in impact modified or not toughened Form or includes this material.