USING CHEMICAL MODIFIERS AND INCREASING THE PYROLYSIS TEMPERATURE FOR HIGH-SENSITIVITY SPECTROMETRIC DETERMINATION OF CADMIUM IN DAIRY PRODUCTS
Abstract
A direct and in situ digestion technique is reported for electrothermal atomic absorption spectrometric analysis of Cd in dairy products. In situ digestion methods offered high sensitivity due to the absence of sample dilution and minimum risk of contamination or analyte loss. Under optimized conditions, the calibration graph was linear in the range of 0-5 ng/mL, with a limit of detection of 0.012 ng/mL. The method was successfully applied in dairy product samples including milks, yogurt, and milk beverages, with spiked recoveries of 91 to 111%. The accuracy of the proposed method was also validated by wet digestion-based method.
Supporting agencies: The authors gratefully thank the Opening Fund of the State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology, No. SKLGP2015K009) and the National Natural Science Foundation of China (No. 21505008) for financial support of this project.
About the Authors
Y. Hu
Chengdu Textile College; Chengdu University of Technology; College of Material Chemistry and Chemical Engineering, Chengdu University of Technology
China
Department of Materials and Environmental Protection, Chengdu, Sichuan 611731; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu 610059; Chengdu, Sichuan 610059
China
Department of Materials and Environmental Protection, Chengdu, Sichuan 611731; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu 610059; Chengdu, Sichuan 610059
M. Xu
Chengdu University of Technology
China
China
State Key Laboratory of Geohazard Prevention and Geoenvironment Protection
Chengdu 610059X. Zhao
Chengdu 7th People’s Hospital
China
China
Department of Clinical Laboratory
Chengdu, Sichuan 610041
W. Qiu
College of Material Chemistry and Chemical Engineering, Chengdu University of Technology
China
Chengdu, Sichuan 610059
China
Chengdu, Sichuan 610059
R. Liu
Chengdu University of Technology; College of Material Chemistry and Chemical Engineering, Chengdu University of Technology
China
China
State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu 610059; Chengdu, Sichuan 610059
A. Zhang
College of Material Chemistry and Chemical Engineering, Chengdu University of Technology
China
Chengdu, Sichuan 610059
China
Chengdu, Sichuan 610059
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Review
For citations:
Hu Y., Xu M., Zhao X., Qiu W., Liu R., Zhang A. USING CHEMICAL MODIFIERS AND INCREASING THE PYROLYSIS TEMPERATURE FOR HIGH-SENSITIVITY SPECTROMETRIC DETERMINATION OF CADMIUM IN DAIRY PRODUCTS. Zhurnal Prikladnoii Spektroskopii. 2020;87(1):172(1)-172(5).
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