DE1798234B2 - DEVICE FOR SUPPLYING LIQUID SAMPLES FOR FLAME PHOTOMETRY - Google Patents

Description

combustible material loaded with samples (20, 15 lines work with flame photometry in such a way that 22, 24) is located, and that these areas of the liquid to be analyzed into the flame of the Exposed to the action of the flame. Burner together with the upholstery

2. Apparatus according to claim 1, characterized in that it is sucked. Although these facilities are differently labeled, they do contain the fact that the absorbent, flammable thread-like fabric can be made material (20, 22, 24) each as one on each opening ao the following essential parts: a gas flame (14, 16, 18) placed element is formed. high temperature burner, a liquid

3. Apparatus according to claim 1 or 2, da- flow system for precise suction of the too characterized in that between the device to analyze the sample in the flame and a spectral (60) to apply the samples to the trophotometer to measure the thermal Conveyor belt (10) and the flame (F) a »5 excited vapor emitted light energy. Ande drying device (90) is arranged, on the other hand it is also known to move the samples with the aid of which the conveyor belt (10) can be moved past. a roll of filter paper, which is replaced by a mechanical

4. Device according to one of claims 1 device is moved to bring into the flame; to 3, characterized in that a Vorrich- compare z. B. Herrmann - Alkemade device (62) for applying a measured 3 ° "FJammenphotometrie", Springer-Verlag 1960, p. 87. Amount of a reference substance on the absorbent, The known analyzing devices have combustible material (e.g. 20) at the movement are significant disadvantages in maintaining the path of the conveyor belt (10) in front of the flame correct analysis conditions during the approach (F) is provided. sucking the sample into the flame.

5. Device according to one of the preceding 35 The correct suction of the sample material is set Claims, characterized in that the difficult problem and the necessary for it Flame (F) alternately in an analyzer- tiny valves and pipes are after re-location and can be brought into a rest position. clogged and dirty. In space-

6. Device according to one of the preceding common is therefore a daily break for work Claims, characterized in that a 40 cleaning is required. Different samples with Spectrophotorneter (74) on the flame (F) of different concentration and facing away from each other Side of the conveyor belt (10) are applied before suction through a and opnrHne? is headed uicscluc management. Hence, the mutual represents Sample contamination a serious one

45 problem, if not complicated ililiseimich-

lines are provided that regularly and preferably after each sample the lines and the burner clean. Such cleaning devices are

The invention relates to a device that is fundamentally incompatible with the man from Bremen whom it for feeding liquid samples to a flame for 5 <> have to clean and through which the flame photometry is passed with a band of absorbent materials.

capable material, a facility to provide further require those currently in use

indicate application of the samples to the tape and torch designs in relatively large quantities a device for the successive transport of the combustible gas, whereby considerable heat em-band straight into the flame. 55 genes and noises are generated. Also are

In the known flame photometric processes, such burners require the addition of lithium salts a lithium salt, for example lithium chloride, as a precise control of the large flames or lithium nitrate, added to the blood serum sample, and the sample quantities are difficult to carry out. to this with a normal or upholstery fabric to the object of the invention is to provide a device dei

Mistake. If the sample ^containing the reference material is further developed in such a way that it is brought into the flame of the burner, then different samples result in a simple quantitative determination of the constituents that analyze each other quickly and without mutual influencing by conduction of the spectral light can be given to the flame,
With the spectral line of the component on a light, this object is achieved according to the invention

Sensitive arrangement that has one of the strengths of the ⁶ 5 that a conveyor belt of non-flammable, the spectral light corresponding electricity generates. The same color of the flame is not influencing material at the same time the spectral light of the spectral line is provided, which has openings in which lithium absorbs, combustible, with probes on another light-sensitive arrangement area

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loaded material is located and that these areas ΪExposed to the action of the flame-Acrdcü.

So the new device has a conveyor belt ™? a number of sample containers, one facility! Passing a measured amount of a sample r _e? Nen the sample container, a gas burner, a Snrichmng to transport the band. * Of the votes over-execution and into the flame of GasfSneß and a spectrophotometric AuswerteeinSng ^ ur analyzing the of the thermally stimulated sample Light energy on. Optionally, a device for inserting a cover material together with the sample and sample container can also be provided. This input device is arranged on the line of movement of the transport belt in front of the gas burner. K is used, it shall be the spectrophotometric Aussammensetzung ^ rA tm ™ & Jj [^ Surchgedem suction in_ the ^B ^ ⁿ ^ _erweadung a must- leads Durcö ve ^

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The water lily layer consists of two non-flammable layers, each of which is provided at regular intervals with connectors, which are aligned with the other layer. Mf formed the "M manner a sample container, m which an access through the opening in the upper layer" E.nEabe of the sample substance and, where appropriate, reference e.nes

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layer

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° '™ _M ^e _f " _d °, _{se We} i _se " earth sample containers 48, 50, are Au ^ i & c * ^ ^ ^ _access through de bor HM »-8 _{0 (f} through mogl.ch .sl · In the

the inside diameter of which is somewhat larger than the length _{mcsscr dcr}

Analvse In the case of the A

container it is also not necessary that different SX different concentration and Zu-HS5 £ H

^s ; ^ne, _samples einschrankt container d.enen.

In Fig. 3, an exemplary embodiment of a flame direction 88 is established, which consists of a lamp and menphotometric analysis device see a photocell. The sub-facility will shown schematically that with the in F i g. 1 shown vibrated until the top of the measuring conveyor belt is working. The conveyor belt 10 with tubes located directly over the storage location on the the sample containers or sample storage locations 48, 5 is located on the conveyor belt. On the end of the measuring tube 50, 52, 54, 56 and 58 over the openings 36, 38, a slight pressure is exerted so that the liquid 40, 42, 44 and 46 is a content not shown from the tube out to the storage location Supply roll arrives with a feed (not shown). After passing the drying facility fed. Such devices are provided with the sample substance known and do not form part of the invention, they io memory location directly via the micro-burner 92. It are, however, to carry out these with the demonstrated that better analytical results are achieved through drying provided device required. For example, results may be possible because unimportant parts of the the tape 10 can be provided with a perforation and liquid sample can be removed from the storage location a ratchet wheel can be guided, which the belt and therefore the photometric analysis does not successively switches from one point to the other. 15 cover or otherwise change. Without one The tape 10 is subjected to aliquot drying by the carrier liquid or the device 60 and, if desired, in the already described otherwise vaporized sample liquid give the flame Way of an optionally available weakness, whereby a more irregular combustion part device 62 for an upholstery fabric. tion takes place. Drying creates such It can be seen from the illustration that a measured amount removes substances, which makes them more reliable and better This part of a sample substance and a measured reproducible analytical result are obtained who-part of an upholstery fabric in one and the same place. The spectral flame F is with the photo through an opening 64 in the upper non-burning detector 94 is evaluated. The results of the anabaric slice are entered through it. This analysis can be calculated automatically and with the Entering at one point is not critical and 25 pens 98 can be written on one strip 96 be carried out in different places. the. After the analysis, the tape 10 is on a The cover material, for example a lithium take-up reel, which is coupled to the device 82 impregnated in the porous material, is coupled to the drive salt. The tape can be stored be. Furthermore, the same allocation device can be withdrawn from or to.

Entering both substances can be used. The belt 30 An automatic aliquot part 10 has already been switched on until the point T is directly set up and a device for carrying out over the vertically arranged burner 66 with the analysis is proposed. The new device reached flame F. In order to avoid undesired heat effects in these devices too, the burner 66 can be used at the point.

68 from the position shown in broken lines into the vertical position. If desired, a self-contained kale position can be pivoted. Furthermore, the combustion or internal fuel system for the device can also be arranged to be movable in the vertical direction. For example, water will be from, as a result of which the flame F acts successively on the storage locations which differ from a supply of distilled water as required, but is passed from into an electrolysis device. There your operating position during the advancement of the 40 the water is moved out in hydrogen and oxygen geBandes. Fuel and Sauer- gaps, after which both substances are fed to the substance for the burner 66 from storage containers burner via lines. Combustion is fed in at 70 and 72. The light emitted by the vaporized known way, for example by a sample substance, is obtained with the platinum black igniter, which analyzes an automatic ignition value device 74, which is arranged in such a way when the water supply is activated and that it is the result of the spectral flame Electrolyzer causes. Receives such light. A self-contained fuel supply suitable for this purpose renders value devices and methods for their use superfluous; 50 photometers.

In Fig. 4 shows a conveyor belt 10 which, as already described, consists of the invention A large number of sample storage locations is provided according to the conveyor belt from a non-combustible and fed from the supply roll 80. It becomes a supporting base with storage on it Reprocess through a number of stations for sample substances on the small breakdowns with a drive device 82 further parts of a sample substance can be applied. Tue « switched. A sample disk 84 is provided with an array of storage locations located either over a number of openings for storing different pro openings in the non-flammable base or between ben provided. A subdevice 86 does not see aligned openings a measured part of a sample substance made of combustible layers. The sample substance and / or de; each opening and transfers this part to each 60 cover fabric is through the openings au a memory location on the tape 10. In the applied the memory location, and the flame de The position shown in dashed lines is the partial device 86 burner then acts through the openings obstruct! provided with a measuring tube, which enters the sample substance on the storage location.

and any suitable non-flammable material with a vacuum source will suffice

is connected, which a predetermined proportion of the 65 of the strength can be used as a supporting base for de

draws liquid sample into the measuring tube. Is used to transport the storage locations. Preferably

If the tube is filled, the base is designed to be sufficiently flexible at its lower end, see fig

Drops formed. This is evaluated with the evaluation that it will be wound onto a supply roll

can, whereby a large amount of conveyor belt can be applied when the irregular minimum space can be accommodated. wedges are kept to a minimum. Typical substances are aluminum foil, copper foil, which are destroyed by the flame of the gas burner

Tantalum foil, brass foil, etc. The amount of sample vaporized is a function of size

The storage locations can be executed in various ways 5 of the opening through which the fabrics are drawn. For example, in FIG. 2 as well as the capacity of the depicted storage location from a porous disk, storage parts, are the strength of each porous which is provided over an opening or recess of the wear-storage location and the size of the recesses condensing underlay, while in Fig. 1, Thus the sample available for evaporation is a storage part which is made up of a con io amount relatively constant if there is a sufficient amount of a continuous layer which is present between two rials to saturate the storage location. If layers of a non-flammable substance are provided, at least the saturation amount is applied, so be. The term "porous" should be understood to mean that the disc or layer can be impregnated with the required amount of the sample substance, so that it does not prevent evaporation by these substances non-combustible layers are shielded at the corresponding storage location or can be stored as. In the case of the FIG. In the exemplary embodiment shown via the absorption capacity of the storage location, the amount of substance emanating from the storage location can be discharged. Furthermore, be surrounded with a hydrophobic barrier B , which is a z. B. consists of paraffin wax and the transmission 20 lock to prevent contamination between or diffusion of the applied substances from the see the storage locations superfluous if the ver storage location prevents. In its simplest form, fabric that can vaporize shortly afterwards by drying, the barrier B has a diameter that is removed somewhat larger. The drying causes drainage greater than the diameter of the underlying opening in the carrier slab and prevents any separation in the non-combustible layer. It becomes so 25-sided pollution by diffusion above through the non-combustible layer compared to that of a continuously formed porous medium. Burner flame protected and holds practically all of them The following examples serve to explain

Substances at the storage location. The storage location should be. They are not meant to be restrictive, but rather single consist of a material that is understood by the borrowed as exemplary embodiments, evaporated sample material or reference material outgoing 30 The conveyor belt used in the examples Light not affected. This is to be understood as consisting of an acid-cleaned cellulose filter Dali the storage area no admixture or paper no. 589 from Schleicher and Schuell, which one Light degradation or some other change between aluminum des with recesses caused by the substances emanating light, foils is arranged in the manner described above. which would result in an inaccurate evaluation. 35 The conveyor belt is on a supply die The storage location should initially be free of the data to be analyzed and is provided by a small sample input station be lysing components of the sample. The loading and an analysis zone moves through However, the tensile material can be present in impregnated form. a micro-burner is provided that runs on propane In addition, the aim is to provide as much clean and oxygen as possible. Then comes that speed the memory location after exposure to the flame 4 ° conveyor belt on a winding roller. The micro-possible have little ash or residue. Brenner is between a rest position and a Fillet päpiei c liui little ash production or gc analysis layer in which the flame on the sub-rings Residues are known and can also act on the storage part, moved back and forth, can be used, provided that they allow the other ren requirements described above meet 45 conveyor belt coupled so that when moving will. Suitable substances for use as a storage location in the analysis zone of the Deionized nitrocellulose and filter micro-burner have got into its analysis position. That paper 589 by Schleicher and Schuell, acidic specimen given off by the vaporized sample material Whatman # 541, Whatman acid purified tral light is made from a magnesia No. 42 etc. 5 ° coated reflector on a spectrophotometer

In general, fabric uniformity is reflected which is desirable with a photomultiplier tube and operation. Is connected. The spectrophotometer is, for example, best results are achieved when the side of the transport facing away from the micro-burner is placed in the middle of the storage location on the same belt and for sodium analysis with a point directly above the flame of the micro-burner in a 589-millimicron pen and a 2.0 -Dichtee-iner for optical analysis of the spectral flame filter provided. After the analysis moves dci term way is arranged. With regard to the substances, the micro-burner is in its rest position, and the transport in paper of uniform composition, thickness, ribbon is switched on. The cycle described: size, capacity for liquids, etc., is repeated when the next storage location is required. If deviations from the same ⁶ ° reach the analysis zone, whereby the micro-quality is greater, then it is advantageous to modify the burner in its analysis system direct photometric method in such a way that one is moved below the storage location. Cover material is also applied to the storage location. When using a ratio measurement in Examples 1 to 10, the above and other deviations, 65

which is a fraction of an aqueous sodium chloride during the operation of the flame photometer

can occur, compensated. It is then a solution of 10 microliters with 35 mg sodium chloride, indicated that a ratio measurement is then also made on one of ten storage units per liter

609 508/34.

17 \) O c

f brought. The following relative radiation intensities read from Table I show the reproducibility of the width that is possible with an m flame photometer:

abelle

example no.

Read relative intensity

1 2 3 4 5 6 7 8 9 10

109

111

109

109.5

110

109.5

107.5

109

110

110

Examples 11 to

The following Table II shows the composition of five solutions of sodium chloride and the relative increasing sensitivity as a function of sodium ion concentration: »5

Table II Na + conc Read lelative Example no. tration intensity meg / liler 17th 103 11th 35 111 Ώ 70 123.6 13th 105 130.4 14th 140 132 15th

It should be noted that the new device can be used as an independent device or within an automatic analyzer which has many different functions Fulfills.

In the description, under a "spectral flame burner" a gas burner can be understood as having pipes for fuel inside it and an oxidizing agent is provided. However, it does not contain any internal lines for liquid sample material, which is to be sucked into the flame, as is the case with the previously known devices of the Case is.

For this purpose 2 sheets of drawings

Claims (1)

headed, which also has one of the applicable light patent claims: strength generated corresponding electricity. A display system is used to display the ratio of the current 1. Apparatus for supplying liquid samples values as a measure of the amount of the sample to a flame for flame photometry, 5 contained component part to be analyzed. with a band of absorbent material, although generally with this lithium device the highest accuracy can be achieved for applying the halini measurement in places Samples on the tape and a device for this procedure does not necessarily have to be performed successive transport of the tape directly into the. When the flame size, the flame flame, characterized in that io temperature and the amount of sample are precisely adhered to a conveyor belt (10) made of non-flammable, which only gives a measurement of the spectral Flame color (F) does not affect the level of emission strength of the sample the exact amount of to material is provided, which openings (14, 16, analyzing component. 18), in the area of which there is an absorbent, known spectrochemical analyzer