RU2178169C2 - Method to detect meat specificity in poultry and game - Google Patents

Abstract

FIELD: veterinary science, veterinary examination. SUBSTANCE: the method studies concentrated extracts of different-typed muscles, for example, pectoral, femoral, shin and others in one and the same bird. Meat freshness level is predetected by pH. Then photometry is performed to evaluate optic density at 310-320 nm wave length. Comparative table is made up to determine meat specificity of tested samples. EFFECT: shortened terms and increased accuracy in determining meat specificity in poultry and game. 1 tbl, 1 ex

Description

 The invention relates to veterinary examination of agricultural products.

 A study of meat for maximum heating is known (see a.s. 1411666, class G 01 N 33 / 12.1986), where fluorescence analysis is used at a wavelength of 300-400 nm.

 The disadvantage is limited capabilities.

 Also known is the study of meat quality (see A. p. 2035399, class G 01 N 33/12, 1992 - prototype), which provides for the measurement of physical quantities of light flux, and they judge the quality of meat.

 The disadvantages of the known technological solutions are limited capabilities, the complexity of the study, the lengthy process of determination.

 The technical solution to the problem is to expand the functionality, reduce the definition time and increase the accuracy of determining the species of meat.

 The technical solution is achieved by the fact that in the method for determining the species of poultry and wild bird meat, which includes measuring the light flux affecting the test sample, concentrated extracts of various muscle groups, for example, thoracic, femoral and lower leg, of one individual, are preliminarily determined meat freshness by pH, then subjected to photometry, measure their optical density at a wavelength of 310-320 nm and compare the comparative table, which is determined in dovuyu belonging of meat.

 The novelty of the proposed proposal is due to the fact that it is possible to differentiate the muscle tissue of various species of birds. In addition, the determination of meat freshness by pH before measuring the optical density increases the accuracy of determining the species, and also indicates the nutritional value of meat. Determination periods are shortened (3-4 hours), because the main time is spent on the preparation of concentrated extracts of various muscle groups of birds.

 According to the patent and scientific literature not found similar to the claimed proposal, which allows to judge the inventive step of the proposed method.

 An example of a specific implementation of the method for determining the species of meat of poultry and wild birds.

 Concentrated extracts of various muscle groups, for example, the thoracic, femoral, lower leg, liver, and heart, are preliminarily prepared; for this, the test samples are finely chopped, poured with distilled water, periodically shaken, and placed in the refrigerator for 3-4 hours. Then it was filtered and the pH was measured in the filtrate, according to the indicators of which the freshness of the meat was judged. Then the filtrate was placed in cell 10, photometry was performed on a KFK-3 instrument. The optical density was measured at a wavelength of λ = 315 nm, while the study turned out to be the optimal wavelength. After the measurements were made, a comparative table was compiled, according to which, in the examination of meat after photometry, the indicators of optical density and pH were compared and the species of meat, freshness and nutritional value were judged. The higher the optical density, the higher the nutritional value. To compile a comparative table, the studied samples were taken from freshly killed birds. A sharp decrease in the optical density of the extract was noted depending on the shelf life of the test meat.

 It should be noted that the fluctuations in the pH of skeletal muscles in poultry are more varied in the range of 5.35-5.86, and in the wild 5.67-6.40. In wild birds, the pH is slightly higher due to an active lifestyle, since with active movement in the muscles, a significant amount of lactic acid accumulates during the breakdown of glycogen. Also, completely different indicators of optical density were observed, both in different species and in one individual for different muscle groups (see table).

Claims (1)

 A method for determining the species of meat of poultry and wild birds, including the measurement of light flux parameters, characterized in that concentrated extracts of various muscle groups, for example, pectoral, femoral, drumstick, and other one specimen, are used to determine the freshness of the meat by pH, then subjected to photometry, measure their optical density at a wavelength of 310-320 nm and make a comparative assessment, which determine the species of the studied meat.

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