Analysis and population exposure health risk assessment of 16 trace elements in commercial dairy products in Shandong province
Objective To determine the levels of 16 trace elements in commercially available dairy products in Shandong province,to study the correlation between the elements,and to evaluate the health risk of their exposure to the population.Methods A total of 155 samples of commercially available dairy products from 16 cities in Shandong province were de-tected by inductively coupled plasma mass spectrometry(ICP-MS)after microwave digestion,and the levels of 16 trace el-ements(Be,Tl,Ag,Cd,Sb,Al,V,Cr,Mn,Co,Ni,Cu,As,Se,Ba,Pb)were measured and analyzed by correlation analy-sis.The levels of 12 trace elements in the samples were analyzed by correlation analysis,and the degree of contamination and the risk of population health exposure were evaluated by human tolerance assessment and target hazard coefficient(THQ)method.Results In addition to 4 elements such as Be,Tl,Ag,Sb,the other 12 trace elements were detected in the samples,and the detection rate of 8 elements such as V,Cr,Mn,Co,Ni,Cu,Se,Ba was 100％.The average contents of the 12 trace elements were Al＞Mn＞Ba＞Ni＞Cr＞Cu＞Se＞Pb＞Co＞V＞As＞Cd;the 3 elements with the highest av-erage contents were Al,Mn and Ba,with the average contents of 0.270 7 mg/kg,0.067 8 mg/kg and 0.064 1 mg/kg,re-spectively.And the correlation analysis among the elements showed that there was a strong synergistic effect between V,Co,and Ni(r,=0.82 and 0.86,respectively,all P＜0.01),while there was an antagonistic effect between Al,Co,Mn,V,Ni,Ba and Se(rs=-0.41,-0.35,-0.45 and-0.40,respectively,P＜0.01).All levels of As,Pb and Cr did not exceed the national food safety standards,and the ratios of the average actual weekly intake(AWI)to the provisional tolerated weekly intake(PTWI)ranged from 0.004％to 8.384％,and the THQ values for potentially hazardous elements were all less than 1.Conclusion The content of 16 trace elements in dairy prod-ucts available for sale in Shandong province complies with na-tional food safety standards,and there is no obvious health risk of dairy product intake on the dietary exposure of the pop-ulation.
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