Method for pre-treating animal sample for stable isotope detection

Abstract

The invention discloses a method for pre-treating an animal sample for stable isotope detection. The method comprises the following steps: putting the animal sample into a utensil without stable isotope interference and freeze-drying the animal sample, and then grinding the animal sample into powder by using the utensil without stable isotope interference so as to finish the pretreatment for detecting the stable isotope in the animal sample. According to the method, a ceramic mortar, scissors or a cutter without stable isotope interference is selected to cut and grind the animal sample, and the freeze-drying step is used to replace a hot drying step in the existing method to reduce the exchange between the stable isotope in the hot drying air and the same stable isotope in the sample. When the detection of the stable isotope is performed after the animal sample is pre-treated by the method, the stable isotope detection result is accurate, and multiple detection results have small coefficient of variation, so the method provided by the invention is a simple, accurate and effective pre-treatment method for the stable isotope detection of the animal sample and is favorable for improving efficiency and accuracy of the stable isotope detection in agricultural products.

Description

technical field The invention relates to a pretreatment method for animal samples used for stable isotope detection. Background technique The traceability of products is the premise of implementing the recall of problematic products. Therefore, the traceability of agricultural products has attracted the attention of manufacturers and consumers. With the promulgation and implementation of the new "Agricultural Product Quality and Safety Law", my country will gradually implement the agricultural product quality and safety traceability system, trace the source of agricultural products that do not meet the quality and safety standards sold on the market, find out the responsibility, and deal with them according to law. The whole process recording system and traceability detection technology are the two foundations for the traceability of agricultural products. my country's agricultural production is mainly based on the family unit, with small scale and large quantities. The sal...

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Problems solved by technology

However, the pretreatment procedure of these detection methods is long, and the analysis procedure takes about 12 hours; moreover, when processing solid co-plant samples such as shearing, drying, and homogenization, there is pollution of metal utensils, which causes problems such as distortion of test results

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