METHOD FOR LOWERING THE DETECTION LIMIT, STABILIZING THE RESPONSE FACTORS AND IMPROVING THE ACCURACY OF GAS CHROMATOGRAPHIC DETERMINATION OF PESTICIDE TRACE AMOUNTS IN AGRICULTURAL PRODUCTS

摘要

The invention relates to food industry, to food analytical chemistry and, more specifically, to methods for lowering the limit of detection, stabilizing the response factors and improving the accuracy of chromatographic determination of pesticide trace amounts in agricultural products. The invention may be used for safety monitoring of food and agricultural products by the content of pesticide trace amounts. The objective of the invention is to provide a method for lowering the limit of detection, stabilizing the response factors and improving the accuracy of gas chromatographic determination of pesticide trace amounts in agricultural products that will make it possible to minimize thermal degradation of analyte protectants by preventing their settling out and syringe rod sticking during sample injection, which will make unnecessary thorough cleaning of the syringe with water or water containing-mixture of a polar solvent after each injection. The objective is achieved by provision of a method for lowering the limit of detection, stabilizing the response factors and improving the accuracy of gas chromatographic determination of pesticide trace amounts in agricultural products comprising addition of an analyte protectant solution to samples prepared for chromatography, wherein 1-glyceryl monooleate is used as the analyte protectant, and its concentration in the samples prepared for chromatography is 0.50 to 2.0 mg/cm³.