[Evaluation of the uncertainty in the determination of arsenic in cosmetics by ICP-AES].
A mathematic model for evaluating the uncertainty of the determination procedure for arsenic in cosmetics by ICP-AES was established. The uncertainty sources for each of the parameters in the model were analyzed. The uncertainties of type A (based on the calculation of the statistical distribution of the determination results) or type B (based on the estimation by experience and the probability distribution of other information) were evaluated. According to the international general method, the component uncertainties were synthesized and extended respectively to obtain the uncertainty evaluation. The results showed that the preparation of standard solutions, the fitted linear regression equation for the calibration curve and the volume of sample solution were the main sources of uncertainties. The proposed method was also suitable for application to the evaluation of the uncertainty of the results obtained by using the method of linear regressive standard curve.
Dai
Qi
Q
Zhejiang Academy of Science and Technology for Inspection and Quarantine, Key Laboratory of Food Safety of Zhejiang Province, Hangzhou 310012, China. dq@ziq.gov.cn
Zhu
Xiao-Yu
XY
Chen
Xiao-Mei
XM
D001151:Arsenic / Q000032:analysis*; D003358:Cosmetics / Q000737:chemistry*; D013054:Spectrophotometry, Atomic / Q000379:methods*
D003358:Cosmetics; D001151:Arsenic