Determimation and Analysis of Four Kinds of Harmful Heavy Metals in Health Food
Objective:To detect the contents of lead,mercury,arsenic and cadmium in four categories of health foods,including hypolipidemic products,immunity enhancement products,blood pressure lowering products and nutritional supplements,and to evaluate the residues of heavy metals,so as to provide reference for the quality and safety evaluation of health foods.Method:Atomic absorption spectroscopy was used to determine the contents of cadmium and lead,and atomic fluorescence spectroscopy was used to determine the contents of mercury and arsenic,and the methodological investigation was carried out.Result:The linear relationship between the four elements was good in the corresponding concentration range,the correlation coefficient was greater than 0.995,and the recovery rate was 93.2%to 98.2%.The contents of cadmium,lead,mercury and arsenic in the four health foods were 0 mg·kg-1 to 0.13 mg·kg-1,0 mg·kg-1 to 0.55 mg·kg-1,0 mg·kg-1 to 0.25 mg·kg-1 and 0 mg·kg-1to 0.30 mg·kg-1.Conclusion:The quality of the 80 batches of health food was generally good,and the contents of mercury and lead in the immunity-enhancing and antihypertensive health foods were relatively high.
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