【摘要】 提出了浊点萃取-火焰原子吸收光谱法测定化妆品中痕量六价铬的方法。考察了溶液pH、APDC用量、Triton X-114用量、平衡温度及时间等条件对浊点萃取率的影响,在优化条件下,对化妆品进行测定。该方法测定铬的检出限为0.026 mg/L,相对标准偏差为1.52%。结果表明:市售多数化妆品中的铬含量超过国家标准,须引起质量监督部门的注意。更多还原

【Abstract】 A cloud point extraction procedure(CPE) was developed for the determination trace amounts of Cr(VI) in cosmetic samples by using flame atomic absorption spectrometry(FAAS).The effect of experimental conditions such as pH,concentration of APDC,concentration of Triton X-114,bath temperature,and time on cloud point extraction were discussed.Under optimized conditions,the detection limit of proposed method was 0.026 mg/L and the relative standard deviation was 1.52%.The results showed that the chromium content in majority of cosmetics was over national standard,and the quality supervision departments should pay more attention to this phenomenon.更多还原