TITLE:
Determination of Cadmium Content in Pork by Graphite Furnace Atomic Absorption Spectrometry Combined with Matrix Matching Method and Its Health Risk Assessment
AUTHORS:
Liping Chen, Weidong Zhang, Guoguang Zhang, Min Liu, Yuchao Tian, Xiaolin Wan, Fule Wang
KEYWORDS:
Temperature Program, Health Risk, Nemerow Pollution Index Method, Cadmium Exposure, Target Hazard Coefficient Method
JOURNAL NAME:
Open Access Library Journal,
Vol.11 No.2,
February
29,
2024
ABSTRACT: Objective: Optimization of the method of graphite furnace atomic absorption in the existing national standard method GB 5009.15-2014 to establish the method for quantitative detection of cadmium and analyze the health risks of cadmium in pork. Methods: The temperature program of the graphite furnace was optimized and was combined with the matrix matching method. The cadmium content and health risk of pork samples from seven producing areas from 2019 to 2020 were evaluated by the single factor pollution index method (Pi) and target hazard coefficient method (THQ) of non-carcinogenic pollutant risk. Results: The optimization method: The correlation coefficient of the standard curve was above 0.999, the recovery rate was 96.9% - 107.1%, and the coefficient of variation was 0.4% - 0.7%. The detection limit was 0.68 μg/Kg. The cadmium content in pork from 2019 to 2020: was 100% qualified, with an average value of 3.05 μg/kg; The range of Pi was 0.0050 - 0.189, the range of cadmium exposure was (0.0004 - 0.01700) μg/(kg?d), and the range of THQ was 0.0005 - 0.0204; The average of cadmium content, Pi, cadmium exposure, and THQ from 2019 to 2020 showed a downward trend, so as the maximum values of them; The cadmium content, Pi, cadmium exposure and THQ: The order of the average of them in the origin product was S5 > S3 > S4 > S1 > S2 > S7 > S6, so as the order of maximum of. Them. Conclusion: The Graphite furnace atomic absorption spectrometry combined with the matrix matching method for the detection of cadmium in pork has good accuracy, high precision and sensitivity, and low detection limit. The method was applied to the analysis of cadmium content in commercially available pork samples. The results showed that 100% of the samples were qualified, and the cadmium content showed a steady downward trend. Its cadmium pollution level is excellent, at a safe level, and there is no intake risk to human health.