微波消解-原子吸收光谱法测定口红中的铅、汞
贾晓琼,邱琳,黄深深
温州市环境监测中心站,浙江温州 325000
Determination of Pb and Hg in lipstick by microwave digestion-atomic absorption spectometry
贾晓琼,邱琳,黄深深
Wenzhou Environmental Monitoring Center, Wenzhou 325000, China
摘要:建立了微波消解-原子吸收光谱法测定口红中铅、汞的方法。以微波消解装置进行口红样品预处理,以石墨炉原子吸收光谱法进行铅含量测定,以冷原子吸收光谱法进行汞含量测定。铅在0.00~2.50 mg/L范围内的线性方程为y=0.022 3x+0.000 8,r=0.999 3,检出限为0.003 mg/L。汞在0~500 ng/L范围内的线性方程为y=400.12x+52.3,r=0.999 9,检出限为6 ng/L。铅、汞测定结果的相对标准偏差分别为0.87%~2.6%,0.65%~2.41%(n=6),加标回收率分别为121%~126%,100%~102%。该方法以单消解方式进行样品前处理,再以该消解液分别进行两种元素含量分析,可提高分析效率,适用于化妆品中金属含量分析。
Abstract:The method of mocrowave digestion-atomic absorption spectrometry was established to determine the content of Pb and Hg in lopstick. Sample was pretreated in microwave digestion device, the content of Pb in lipstick was determined by atomic absorption spectrometry (GFAAS), and the content of Hg was determined by cold atomic absorption spectrometry, respectively. In the range of 0.00-2.50 mg/L, the linear equation for Pb was y=0.022 3x+0.000 8 with the coralation coefficient of 0.999 3, the detection limit of Pb was 0.003 mg/L. In the range of 0-500 ng/L, the linear equation for Hg was y=400.12x+52.3 with the coralation coefficient of 0.999 9, the detection limit of Hg was 6 ng/L. The relative standard deviations were 0.87%-2.6% and 0.65%-2.41% (n=6), and the recoveries were 121%-126% and 100%-102%, respectively. The sample pretreatment was carried out by a single digestion method, and the contents of Pb and Hg were separately determined with the digestion solution, which could improve the analysis efficiency and was suitable for metal content analysis in cosmetics.
关键词:化妆品;口红;石墨炉原子吸收光谱法;铅;汞
Keywords:cosmetics; lipstick; GFAAS; Pb; Hg
本文引用格式:
贾晓琼,邱琳,黄深深.微波消解-原子吸收光谱法测定口红中的铅、汞[J].化学分析计量,2019,28(1):84-87.
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