Simultaneous determination of arsenic,lead and cadmium in cosmetics by ICP-OES
YANG Yong-chao;SUN Yong-ze;ZHANG Chuang;YAN Jing;ZHAO Hao-li-bao;Tianjin Entry-Exit Inspection and Quarantine Bureau;Analytical Testing Center of Tianjin International Joint Academy of Biomedicine;
A simultaneous determination method for arsenic( As),lead( Pb) and cadmium( Cd) in cosmetics by inductively coupled plasma-optical emission spectrometry( ICP-OES) was established. The sample was digested by nitric acid-hydrogen peroxide under the assistance of microwave irradiation. Meanwhile,the conditions of ICP-OES were optimized. The method under optimized conditions shows good linearity with the mass concentrations of the three heavy metal ions in range of 0. 05-1. 20 mg/L. The corresponding linear correlation coefficients for the heavy metals are all 0. 999 8 with the spiked recoveries ranging within 90. 7%-108. 6%,and the relative standard deviation within 0. 44%-4. 59%( n = 6). The limits of detection and quantification of As,Pb and Cd are 0. 63,0. 30,0. 015 mg/kg and 2. 1,1. 0,0. 05 mg/kg,respectively.
【CateGory Index】： O657.31;TQ658