Monitoring the stability of the results of studies of chilled river fish for cadmium content using the method of additions

Abstract

Abstract The results obtained indicate that in the range of less than 0.01 mg of cadmium per 1 kg of river fish prevails (43.3%) over other ranges. The least registered sample results (4.3%) with the range of obtained data - 0.1-1.0 mg/kg. The relevance of the problem under consideration is due to the need to encompass a broad spectrum in the determination of cadmium in river fish in hardware. The primary and important task remains to ensure control of the quantitative content of cadmium, the introduction and application of fast and reliable methods of their research. The analysis of the data obtained shows that all the results on the study of chilled river fish for the content of cadmium, obtained by the methods of stripping voltammetry and atomic absorption spectrometry, to assess the precision and operational control of the error using the method of additions are satisfactory. The implementation of the methods of stripping voltammetry and atomic absorption spectrometry achieves the best precision of research results in the testing laboratory, both under repeatability conditions and under conditions of intermediate precision.