RU2696810C1 - Method for rapid analysis of liquid packaged products and installation for its implementation - Google Patents

Abstract

FIELD: measurement technology.

SUBSTANCE: invention relates to methods of analysing fluid media, mainly to measurement of kinematic viscosity, and can be used in quality control of aviation kerosene and diesel fuel in laboratory conditions at production sites. Method of express-analysis of liquid packaged products consists in the fact that the analysed liquid product in packaged container is placed on electronic scales connected to computer, measuring its weight and ambient temperature, which enables to calculate density of liquid product (ρ) as difference between measured value and reference weight of empty container divided into normative volume of liquid product, and using the formula of Mendeleev to obtain values of densities of the liquid product at standard positive and negative temperatures (ρi), after which, by lowering into the analysed liquid product a capacitive sensor connected to the immittance meter, which is also connected to a computer, commands of which in a certain order change the measurement frequencies in range of 1 to 106 Hz, register and record in memory values of electrical conductivity, resistance, capacitance and loss tangent (tgδi), from which are calculated ratio of electrical conductivity at different frequencies (ni), specific heat of combustion (Qi), which are functions of said ratios at recording temperatures, characteristic frequencies (fi), at which electrical conductivity does not depend on temperature, as well as dielectric permeabilities (εi), macroscopic and microscopic relaxation times of liquid product (τi) according to Pauls equation, after which the Debye relations determine the dynamic viscosity of the liquid products (ηi), and dividing by the obtained density – kinematic viscosities (vi), characterized by the fact that the Debye relations are substituted with standard and relaxation times (τt) tabulated air data (ηt, vt) at current temperature. Installation for method implementation consists of computer with connection to it through appropriate interfaces of electronic scales and immittance meter, which is connected to capacitive sensor lowered into analysed liquid product, through hole in container, where it is packaged, and by means of the corresponding computer-controlled software, performing during a dozen seconds identification of the liquid product and determination of its quality by comparing the measured and calculated parameters with the stored / stored parameters of the standards.

EFFECT: technical result is identification and quality control of liquid products.

4 cl, 3 dwg, 3 tbl

Description

The invention relates to methods for studying fluids, mainly to measuring kinematic viscosity, and can be used in the quality control of aviation kerosene and diesel fuels in laboratory conditions at the production site.

Studies of liquid packaged products showed [1, 2] that in addition to standard methods, which are laboratory, extremely laborious, costly and time consuming [3-9], express methods appeared [1, 10], allowing to determine their main parameters within minutes .

The main parameters of industrial liquid products (fuels, oils, coolants, etc.), and food and household liquids (bottled water, alcoholic and non-alcoholic drinks, vegetable oils, detergents and cosmetics, etc.), according to which they identified (in addition to determining their chemical compositions) are [3-9]:

- kinematic and dynamic viscosity,

- density

- freezing and flash / autoignition temperatures,

- silk or acid numbers and toxicity,

- color, transparency and blurriness and some others.

Both industrial liquid products (ПЖП) and food-household liquids (ПБЖ) are sold mainly in various containers (glass, polymer, etc.), bottling into which, as a rule, automated lines and plants are carried out [11- 15].

Most manufacturers, both ПЖП, and ПБЖ practice protecting their products from counterfeiting by using company containers (bottles, cans, cans, etc.), closing them after filling with various seals and caps. Corks modify, introduce destructible fixators and holographic stickers, etc. However, despite all the tricks, the volume of counterfeit products does not decrease. So today up to 30% of all motor oils sold in Russia are fake, counterfeit coolants are sold up to 40%, brake fluids - up to 50%! A similar picture is with PBS, but which is especially dangerous - fakes pose a threat to public health [16, 17].

Known in terms of determining moisture "The method of determining the mass fraction of water in oils and residual distillation products by measuring the dielectric constant at different frequencies" - RF patent No. 2192001 from 10.27.2002. In practice, the invention is implemented using immitance meters, by measuring the capacitance of the sensor at a frequency of 1 kHz and at a frequency of 1 MHz (in air - C _01kHz and C _01MHz ), and then in oil - C _H1kHz and C _H1MHz ), after which their relative differences are calculated , characterizing the increment of dielectric constant (Δε _t ), and then determine the mass fraction of water in a given oil in percent by the following formulas [19]:

where k _{ε, t} = k _{ε, 20} + m ₂ ⋅ (20-t), k _{ε, 20} are concentration coefficients.

Another close analogue is the "Method for the rapid determination of the kinematic viscosity of aviation kerosene and diesel fuels" - see Patent RU No. 2263301 G01N 11/00, G01N 33/26 published October 27, 2005), including registration of an informative indicator and subsequent calculation of the kinematic viscosity, characterized in that the density of the analyzed product at 20 ° C is used as an informative indicator, and the kinematic viscosity at 20 ° C is calculated according to the following relationship:

ν ₂₀ = k ₁ ⋅ρ ₄ ²⁰ -k ₂ ,

where v ₂₀ is the kinematic viscosity at 20 ° C, mm ² / s;

k ₁ = 23.1, k ₂ = 16.77 - for fuels with a density of 0.780 to 0.820 g / cm ³ ;

k ₁ = 200, k ₂ = 161.83 - for fuels with a density from 0.820 to 0.842 g / cm ³ ;

ρ ₄ ²⁰ - the density of the analyzed product at 20 ° C, g / cm ³ .

The main drawback is the need to find individual empirical coefficients and build nomograms for different types of petroleum products (fuels, oils, etc.), as well as the large error that arises due to the linear approximation of the calculation formula.

At the same time, when the density of fuels is determined in field non-laboratory conditions in the range of ambient temperatures from minus 10 ° С to plus 30 ° С, its values are not converted to a value at 20 ° С according to GOST 3900, but the kinematic viscosity of combustibles is determined immediately at 20 ° C according to the nomogram developed by the authors.

The closest device is the "Diagnostic device for the state of oils and oil products by their active electrical conductivity and dielectric constant" - (see patent RU No. 2209422 C1, G01N 27/04, G01N 27/22, publ. 07.27.2003). The device contains a tunable generator of electromagnetic waves in the range of 1 kHz - 1 MHz, acting on the sensor with the diagnosed product and a temperature meter. Signals from the sensor enter the determinants of active electrical conductivity and permittivity. From the temperature meter and from the determinants, the data goes to the microprocessor and then to the data bank. Final results in the form of permittivities, active conductivities, conductivity ratios at different frequencies, specific heat of combustion, which is a function of this ratio at a given temperature (t), characteristic frequencies (ƒ _i ) at which the conductivity is independent of temperature, as well as the dependence of active electrical conductivity and permittivity of the frequency are transmitted to the indicator with the possibility of output to a computer. In this case, the heat of combustion is determined by the formula [18]:

where n = χ _{1 MHz} / χ _{1 kHz} is the criterion for the identity of oils at a temperature t in the range from 0 to 50 C; q = 47250.2 kJ / kg is the calorific value of oil containing light fractions, Δq = 758 kJ / kg is the calorific value of oil containing heavy fractions, a = 0.2374t + 2.878t; b = 0.143t-4.25t.

The objective of the invention is to provide a method for the express analysis of liquid packaged products, for their identification and compliance with standards and technical conditions of production, i.e. the quality of liquid products, as well as to identify counterfeit products.

The essence of the invention of the method of rapid analysis of liquid packaged products is that the investigated liquid product in packaged containers is placed on electronic scales connected to a computer that measure its weight and ambient temperature, which allows us to calculate the density of the liquid product (ρ) as the difference the measured value and the reference weight of the empty container divided by the standard volume of the liquid product, and using the Mendeleev formula to obtain the values of the densities of the liquid product at standard positive and negative temperatures (ρ _i ), after which, having lowered a capacitive sensor into the liquid product under study, connected to an immitance meter, which is also connected to a computer, the commands of which change the measurement frequencies in a certain order in the range from 1 to 10 ⁶ Hz, and recording in memory of the values of electrical conductivities, resistances, capacities and tangents of loss angles (tanδ _i ), which are used to calculate the ratios of electrical conductivities at different frequencies (n _i ), specific heat of combustion (Q _i ), which are functions of these solutions at recording temperatures, characteristic frequencies (ƒ _i ) at which the electrical conductivity is temperature independent, and dielectric permittivities (ε _i ), macroscopic and microscopic relaxation times of the liquid product (τ _i ) are calculated according to the Pauls equation, and then according to the Debye relations determined by the dynamic viscosity of liquid products (η _i), and dividing by the density obtained - kinematic viscosity (ν _i), characterized in that, in relation Debye substituted and supplemented with appropriate standard time contact relaxation (τ _c) air tabular data (η _a, ν _b) at the current temperature (Tab. 3).

To increase the reliability of identification and determination of the quality of liquid products, according to the formulas of the temperature dependences of permittivities and tangents of loss angles, as well as Walter's formulas for kinematic viscosities, their values are calculated at standard positive and negative temperatures, and the differences in permittivities (Δε _i ) are calculated on certain frequencies and the mass fraction of water (x _iH2O) determined by empirical formulas in liquid products which are added to the measured and Comput lennym parameters, whereupon the matrix formed ( "images") of liquid products, which are compared with the entered / the stored "reference images" of the computer - the same matrix liquid products manufacturers.

The final identification of the liquid packaged product, as well as its compliance with the established parameters of quality and quantity, is carried out taking into account the permissible deviations established by the relevant standards and technical conditions for packaged liquid products and their containers.

Installation for implementing the method, consisting of a computer, with an electronic balance and an immitance meter connected to it through the corresponding interfaces, which is connected to a capacitive sensor lowered into the liquid product under investigation, through the opening in the container where it is packaged, and using the appropriate software, controlled a computer that performs identification of a liquid product and determination of its quality for tens of seconds by comparing the measured and calculated parameters with the entered / stored Isya parameters in memory standards.

EFFECT: identification and compliance with standards and technical conditions of production, i.e. quality control of liquid products, as well as to identify counterfeit goods.

The "images" of the standards of liquid products that are entered and stored in the computer's memory consist of two groups of characteristics:

the first is the characteristics of a liquid product packaged in containers (weight, density, spectra of electrical conductivities, resistances, permittivities and loss tangents in the range of 1-10 ⁶ Hz, dynamic and kinematic viscosity at current and standard temperatures, viscosity index, pour point);

the second is the characteristics of the container into which the liquid product is packaged (type and container weight, type and weight of the container lid, tare volume).

The invention is illustrated by drawings, where in FIG. 1 - shows the dependence of the dielectric constant on temperature (a) and frequency (b); Fig 2 is a meter of dielectric properties of a liquid; FIG. 3 - block diagram of the installation (PAK - portable automatic complex);

The invention is as follows:

и эквивалентную - λ, определением которых «занимается» кондуктометрия [20]. При этом удельная электропроводность жидкости является обратной величиной удельного сопротивления (r)

, а эквивалентная и удельная электрические проводимости связаны соотношениями:Due to the dependence of the electrical conductivity of liquid media on the concentration of components in them, two main types are distinguished: electrical conductivity -

and equivalent - λ, which conductometry is “engaged in” to determine [20]. In this case, the conductivity of the liquid is the inverse of the resistivity (r)

, and the equivalent and specific electrical conductivities are related by the relations:

where C is the concentration of liquid components (mol / ml); V is the volume of liquid (ml) containing, at a given concentration, 1 gram mol of component.

A special case of electrometry, or, as is customary to determine in the analysis of impedance, is dielcometry [21], which defines the relationship between conductivity loss and dielectric loss, in liquid and viscous media with dielectric properties in particular, which are expressed as permittivity ε, and determined by measuring the loss tangent tanδ and conductivity σ:

where ε is the relative dielectric constant; ε '' is the complex part of the dielectric constant; ε 'is the real part of the dielectric constant; σ is the active conductivity, taking into account both types of losses; ω is the circular frequency; ε ₀ is the dielectric constant of vacuum (8.85⋅10 ^-12 F / m).

Using the Debye formulas [22], it is possible to determine the relaxation times (τ) of liquid media:

where ε is the relative dielectric constant; ε '' is the complex part of the dielectric constant; ε 'is the real part of the dielectric constant.

The complex part of the dielectric constant ε "tends to zero, both for small and large values of ωτ and reaches a maximum at ω _m τ = 1 (Fig. 1" b "), in which

and the complex permittivity itself is equal to

where τ _μ is called molecular or microscopic relaxation time

The relationship of the molecular relaxation time (τ _μ ) with the macroscopic relaxation time (τ) is expressed by the Pauls equation [22]:

which (in the limit for the liquid - Fig. 1 "a") can be approximated by the formula:

Then, from the point of view of comparing any reference fluid with the test fluid, you can use the ratio of the indicated times, which according to Debye are associated with their viscosities - η _i , by a simple ratio:

Thus, instead of sampling and determining the kinematic viscosity - ν using a viscometer, and then calculating (through the density) the dynamic viscosity - η, we can first determine the physical viscosity (dynamic) by the change in dielectric constant in comparison with the standard, including taking into account the temperature and frequency, and then calculate its kinematic viscosity according to the "inverse" standard formula, if the density of the liquid product is known [5]:

Taking into account the fact that all produced liquid products are, as a rule, certified and have high quality parameters, i.e. the stability of the composition, the reliability of viscosity and density indicators at certain temperatures, as well as the accuracy of packaging in branded containers [15, 23], the proposed method for the express analysis of packaged liquid products for identification of counterfeit products was developed. The method was developed and tested as part of the examination of a batch of Castrol Magnatec motor oil in the amount of 439 cans, in order to isolate counterfeit products from it [2].

Description of the method for engine oil

As a rule, manufacturers of petroleum products publish on their websites [15] the main characteristics of their products, oil in particular (tables 1, 2) and in the passports accompanying each batch of oil indicate their net weight (net weight) and the number of cans.

When developing the proposed method, in addition to the indicated data, all canisters with standards were weighed, then opened, and with the help of a coaxial capacitive sensor and an E7-22 immitance meter, the capacities and tangents of the loss angles of oils packaged in them were measured. Then, the reference oils were poured into another container, and the canisters from under the standards were washed, dried and weighed, including the lids [2] (see tables 1, 2).

Therefore, knowing the mass of empty canisters with a volume of 1 and 4 liters with lids, you can weigh, without opening them and without sampling, to determine the density of liquids in them by the formula:

where mi is the measured weight of the i-th sample in packaged containers; mj is the weight of the j-th reference tare; Vij = 1 l, 2 l ... Nl is the reference volume of the i-th fluid poured into j is the volume of the container.

In this case, the change in density from temperature is determined by the Mendeleev formula [24]:

where ρ _T and ρ ₂₉₃ are the density of petroleum products, respectively, at temperatures T and 293 ° K; β _p is the coefficient of volume expansion; Δt = (18.310-13.233⋅ρ _{22 ° C} ) ⋅10 ^-4 - temperature correction to the density by one degree; t is the desired temperature, ° C,

Examination of about 500 pieces of 4 and 1-liter cans with Castrol Magnatec oil showed the high accuracy of the proposed method [2].

The fact is that one line of automated oil filling RLFMS, which, for example, is used by LUKOIL and is included in the State Register of Measuring Instruments (Registration number 41083-09), has 11 dispensers for 3 ranges of volume and mass dispensing of canisters and ensures the following accuracy [ 23]:

volume of 1 liter - weight from 0.82 to 0.91 kg - accuracy from 2.87 g to 3.19 g .;

volume of 4 liters - weight from 3.36 to 3.63 kg - accuracy from 11.76 g to 12.71 g .;

volume of 5 liters - weight from 4.20 to 4.54 kg - accuracy from 14.7 g to 15.89 g.

The standard for polymer packaging [25] requires that values and limit deviations from the nominal dimensions and mass of containers, which should not exceed [Appendix K], be set in the regulatory documents for containers for specific products:

0.1 mm - for geometric dimensions (clause 9.2.1);

0.05 mm. - for wall thickness (paragraph 9.3.1);

10% - for nominal capacity (clause 9.4.1);

10% for the tare mass (paragraph 9.5.1).

Therefore, canisters can have the following mass distribution:

volume 1 liter - weight 0.07 kg - accuracy 7.0 g;

volume 4 liters - weight 0.26 kg - accuracy 26 g.

Thus, it is possible to calculate the density of the sample with the following accuracy:

for a volume of 1 liter - Δ% = 100 * [(820 + 2.87 + 7.0) / 1000- (820-2.87-7.0) / 1000] / 0.820 = (0.01974 / 0.820) * 100 = 0.02407 * 100 = 2.4%;

for a volume of 4 liters - Δ% = 100 * [(3360 + 11.76 + 26.0) / 1000- (3360-11.76-26.0) / 1000] / 3360 = (0.07552 / 3.360) * 100 = 2.24%.

Foreign manufacturers, Castrol, in particular, use CRANDALL International dynamic weight dosing equipment, which ensures accuracy (when filling containers up to 20 kg) - 0.05% [13, 15], i.e. 7 times more accurate than the Italian equipment of LUKOIL, and the maximum deviations from the nominal sizes and mass of their containers - not more than 1%. In this case, the accuracy of determining the density will be:

for a volume of 1 liter - Δ% = 100 * [(820 + 0.41 + 0.7) / 1000- (820-0.41-1.7) / 1000] / 0.820 = (0.00222 / 0.820) * 100 = 0.0027 * 100 = 0.27%;

for a volume of 4 liters - Δ% = 100 * [(3360 + 1.68 + 2.6) / 1000- (3360-1.68-2.6) / 1000] / 3360 = (0.00856 / 3360) * 100 = 0.25%.

As it follows from the above given formulas and equations (6-13) and measuring With _edited tgδ samples E7-22 e.g. via coaxial capacitance sensor [26], allows to calculate the average value of the relative dielectric constant (ε) oil samples, and the availability of these standards (τ _e , η _e ), - to determine the dynamic viscosity of the oil sample (η _o ), through the calculation of molecular (τ _o ) and macroscopic relaxation times (τ):

Taking into account that the measurements are carried out at certain frequencies (in the range of the immitance meter), and the value ε _∞ → 1 (Fig. 1 “a”) at high temperatures (for example, during vaporization), we obtain:

Replacing ω by 2πƒ and dividing each term of the equation by a factor at τ ² , we obtain:

Substituting the measurement frequencies and the measured values of tanδ and ε of the samples, we find the macroscopic relaxation times (τ) of the studied oil samples at ambient temperature:

After that, the molecular time (τ _o ) of the sample is determined by the third equation of system (16), and its dynamic viscosity (η _о ) is determined by the second.

To compare the results obtained with the reference values at three generally accepted standard temperatures (15 ° С, 40 ° С, 100 ° С) and two negative ones - solidification and the maximum operating temperature of the corresponding type of oil, we used the limitation of the loss in oil products at 100 ° С ( tanδ≤0.02) and formulas of the temperature dependence of tanδ and ε [27]:

as well as Walter's formulas expressing the kinematic viscosity as a function of temperature [28]:

where the empirical coefficients a and b are determined by the known pairs of ν and T values, by the following formulas:

To identify Castrol oil samples, the kinematic and dynamic viscosity data of the standards were used at 3 values of positive temperatures (15 ° C, 40 ° C, 100 ° C) and 2 negative (solidification and production, depending on the brand of oil), which were found by Walter's formulas for the standards:

Similarly, to identify oil samples by pour point, Walter's formulas (24-30) were used, with a kinematic viscosity of 10,000 mm ² / s [29]:

where 10000 is the kinematic viscosity of the i-th oil product at a pour point T _i , ° K; a _i and b _i are constants for the i-th liquid oil product.

Substituting the obtained values of kinematic viscosities from formulas (24-30), with a relative error of less than 1% (table 1, 2), the freezing temperatures of the standards were found:

The essence of the method and installation of its implementing

Thus, the present invention was the development of a method for the express analysis of liquid packaged products and installation that implements, for the identification of liquid packaged products by the following parameters at ambient temperature (room temperature):

- density

- dynamic and kinematic viscosity, including at standard temperatures

- pour point,

- humidity

- characteristic frequency

- calorific value

- spectrum of electrical conductivity, permittivity and tangent of loss angles in the range of 1-10 ⁶ Hz.

The technical result is achieved by the fact that in the proposed method and the installation of it that implements, the studied liquid product in packaged containers is placed on electronic scales connected to a computer, measuring its weight and ambient temperature, which allows us to calculate the density of the liquid product (ρ), as the difference the measured value and the reference weight of the empty container, divided by the standard volume of the liquid product, and using the Mendeleev formula to obtain the values of the densities of the liquid product at standard positive and negative Yelnia temperatures (ρ _i), and then lowered into the test liquid product capacitive sensor connected to the meter immittance, which is also connected to the computer by commands which in a certain order change measurement frequency in the range from 1 to 10 ⁶ Hz, registration is performed and recording in memory the values of electrical conductivities (σ _i ), resistances (R _i ), capacitances (C _i ) and loss tangent tangents (tanδ _i ), which are used to calculate the ratios of electrical conductivities at different frequencies (n _i ), specific calorific values (Q _i ), which are functions of these relations at recording temperatures, characteristic frequencies (ƒ _i ) at which the electrical conductivity is temperature independent, and also permittivities (ε _i ), macroscopic and microscopic relaxation times of the liquid product (τ _i ) according to the Pauls equation, and then according to the ratios Debye defined dynamic viscosity of liquid products (η _i), and dividing by the density obtained - kinematic viscosity (μ _i), characterized in that, in Debye relationship substituted and supplemented with the corresponding standard time E relaxation time (τ _c) tabular air data (η _a, ν _b) at the current temperature, thus, to improve the reliability of identification and determination of the quality of liquid products, the formulas of the temperature dependence of dielectric constant and loss tangent angles, and Walter formulas for kinematic viscosities, their values are calculated at standard positive and negative temperatures, and also the difference calculated dielectric constants (Δε _i) at certain frequencies, and determine by empirical formulas tsya mass fractions of water (x _iH2O) in liquid products, which are added to the measured and calculated parameters, then generates a matrix ( "images") of liquid products, which are compared with the entered / stored in the memory of "master image" of the computer - the same matrices manufacturers of liquid products, characterized in that the final identification of the liquid packaged product, as well as its compliance with the established parameters of quality and quantity, is carried out taking into account the permissible deviations established in accordance stvuyuschimi standards and specifications for packaged liquid products and their packaging.

Installation that implements the inventive method

An installation that implements the proposed method consists of computer 2 (for example, HP 290 G1; screen - 23.8 '' with a resolution of 1920 × 1080; Intel Core i3 7100 processor with a processor frequency of 3.9 GHz and DIMM RAM, DDR4 4096 MB 2400 MHz; video card - Intel HD Graphics 630; HDD - 500 GB, 7200 rpm; DVD-RW), to which are connected via appropriate interfaces - VLTE 1 electronic scales with a temperature sensor (via USB) and an E7-20 3 immitance meter (via RS- 232), which is connected to the capacitive sensor 5 through the switch 4. The sensor 5 is lowered into the investigated liquid product, through the neck in the container, where t from packaged [30, 31].

Using the software supplied with E7-20 (UShAI.00247 12 01-PO: program text) and the developed special software (SPO), using the established exchange protocol, computer 2 controls all measurements and a frequency with a resolution of 1 Hz in the range from 25 up to 999 Hz and with a step of 1 kHz in a range from 1 kHz to 1 MHz [30], determining the characteristic frequency (ƒ _i) a liquid product and the conductivity value at 1 kHz (σ _{1 kHz),} and 1 MHz (σ _{1 MHz)} and in their ratio (n _i ) - specific heats of combustion (Q _i ), also measuring the dielectric permeability (ε _i ) and their difference (Δε _i ), for subsequent calculation of the mass fraction of water (x _iH2O ) and macroscopic and microscopic relaxation times of the liquid product (τ _i ) using the Pauls equation, followed by the Debye ratios with tabular air values, dynamic viscosities of liquid products (η _i ) are calculated, and kinematic viscosities (ν _i ) are divided by the resulting densities.

To determine G _{1 kHz} and G _{1 MHz} , as well as to find the characteristic frequency (ƒ _i ), frequencies are _selected in the range from 1 kHz to 1 MHz, for which 10 seconds are required [30], after which the liquid product is identified and its quality is determined, by comparing the measured and calculated parameters with the entered / stored in the memory parameters of the standards of liquid products of manufacturers.

The proposed method and installation, which implements it, will find application in the Metrology and Certification Centers for testing liquid packaged products, for their safe use by consumers, as well as in expert organizations.

The proposed method and installation, which implements it, can be used by manufacturers of liquid packaged products to protect their brand.

The proposed method and installation, which implements it, can find application in. state supervision bodies (state consumer supervision, state supervision, etc.).

The proposed method and installation, which implements it, can find application in universities, research institutes and design bureaus for scientific research and design and technological support for the application of RVP and PBZ.

The proposed method and installation, which implements it, can find application in the implementation of Decisions of the Presidium of the State Council on the issue of "On the national system of consumer protection."

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Claims (4)

1. The method of rapid analysis of liquid packaged products, which consists in the fact that the investigated liquid product in packaged containers is placed on electronic scales connected to a computer, measuring its weight and ambient temperature, which allows us to calculate the density of the liquid product (ρ) as the difference values and reference weight of empty containers divided by the standard volume of the liquid product, and using the Mendeleev formula to obtain the densities of the liquid product at standard positive and negative temperatures pax (ρ _i), and then lowered into the test liquid product capacitive sensor connected to the meter immittance, which is also connected to the computer by commands which in a certain order change measurement frequency in the range from 1 to 10 ⁶ Hz, registration is performed and recording in memory of the values of electrical conductivities, resistances, capacities and tangents of loss angles (tanδ _i ), which calculate the ratios of electrical conductivities at different frequencies (n _i ), specific heat of combustion (Q _i ), which are functions of these ratios at temperatures registration, characteristic frequencies (f _i ) at which the electrical conductivity is temperature independent, as well as permittivities (ε _i ), macroscopic and microscopic relaxation times of the liquid product (τ _i ) according to the Pauls equation, after which dynamic viscosities are determined liquid products (η _i), and dividing by the density obtained - kinematic viscosity (v _i), characterized in that the relationship standard Debye substituted and supplemented relevant relaxation times (τ _{c) the} tabular da nye air (η _a, v _a) at the current temperature. 2. The method according to claim 1, characterized in that to increase the reliability of identification and determination of the quality of liquid products according to the formulas of the temperature dependences of the dielectric permittivity and loss tangent, as well as Walter's formulas for kinematic viscosities, their values are calculated at standard positive and negative temperatures, and also the difference calculated dielectric constants (Δε _i) at certain frequencies and the mass fraction of water are determined by empirical formulas (x _iN2O) in liquid products, to orye added to the measured and calculated parameters, after which the formed matrix ( "images") of liquid products, which are compared with the entered / the stored "reference images" of the computer - the same matrix liquid products manufacturers. 3. The method according to claims 1 and 2, characterized in that the final identification of the liquid packaged product, as well as its compliance with the established parameters of quality and quantity, is carried out taking into account the allowable deviations established by the relevant standards and specifications for packaged liquid products and their containers. 4. Installation for implementing the method of express analysis of liquid packaged products, consisting of a computer with an electronic balance and an immitance meter connected to it through the appropriate interfaces, which is connected to a capacitive sensor lowered into the liquid product under study through an opening in the container where it is packaged, and using appropriate computer-controlled software, identifying a liquid product and determining its quality by comparing the measured and calculated parameters with the entered / stored in the memory parameters of the standards.

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