石墨炉原子吸收分光光度法测定化妆品乳液中铬的含量

目的建立石墨炉原子吸收分光光度法测定化妆品乳液中铬的含量。方法采用铬空心阴极灯,微波消解样品,测定条件:波长357.9 nm,狭缝0.7 nm,灯电流10 mA,石墨炉原子化器,保护气为氩气,氘灯背景校正系统。结果铬浓度在2~50 ng/ml范围内线性关系良好(r=0.9993,n=6),平均加样回收率为98.2%,RSD=0.7%(n=6)。结论该方法灵敏、准确、可靠,可用于化妆品乳液中铬的含量测定。

Determination of Chromium in cosmetic emulsions by graphite furnace atomic absorption spectrometry

Objective To determine Chromium in cosmetic emulsions by using the method of graphite furnace atomic absorption spectrometry.Methods Chromium hollow cathode lamp was used,the samples were digested using a mi- crowave digestion instrument.Determination conditions： the determined wave length was 357.9 nm,the slit-width was 0.7 nm,the electric current of the light was 10 mA,graphite furnace atomizer was used,the protective gas was argon,deuteri- um lamp background correction was used.Results The method showed a good linear relationship within the range of 2- 50 ng/ml （r=0.9993,n=6）.The average recovery rate was 98.2% with RSD=0.7% （n=6）.Conclusion The method is sensi- tive,accurate,reliable and can be used for the determination of chromium in cosmetic emulsions.