A Proficiency Test Report of Lead and Arsenic in Cosmetic
To further improve the laboratory testing capability through a proficiency test report of Lead and arsenic in cosmetic.Methods:The level of lead was tested by a flame atomic absorption spectrophotometry and the level of arsenic was tested by hydride generation atomic fiurescence spectromety,Z-score was used to evaluateand predicate test results. Results:In the lead test, the Z-score was 1.60;in the arsenic test ,the Z-score was 0.27.it indicated that both tests met the proficiency requirement (both Z≤2).Conclusion:The proficiency tests suggestion couple of key issus in laboratory management ,such as spiked recorery test control procedure, reagents preparation ang operation,purified water and bland controls.
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