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建立了离子色谱-电感耦合等离子体质谱法(IC-ICP-MS)快速测定皮革及皮革制品中Cr(VI)的分析方法。样品经磷酸氢二钾缓冲溶液浸泡提取Cr(VI),离子色谱分离后,再进行电感耦合等离子体质谱法测定。优化了质谱及色谱条件,确定选择硝酸铵为流动相,其浓度为75 mmol/L,p H=8.0。方法的线性方程为y=273187 x-60.14,相关系数大于0.999,方法的定量下限为0.002 mg/kg。在0.005、0.02和0.05μg加标水平下,加标回收率为96.2%~103.6%,相对标准偏差为2.8%~4.6%,该方法简单、准确、灵敏度高,可用于皮革及皮革制品中Cr(VI)测定。
A method for the rapid determination of Cr (VI) in leather and leather products by ion chromatography-inductively coupled plasma mass spectrometry (IC-ICP-MS) was established. The samples were soaked in dipotassium hydrogen phosphate buffer solution to extract Cr (VI), and then separated by ion chromatography, then determined by inductively coupled plasma mass spectrometry. The conditions of mass spectrometry and chromatography were optimized and ammonium nitrate was selected as the mobile phase at a concentration of 75 mmol / L and p H = 8.0. The linear equation of the method is y = 273187 x-60.14, the correlation coefficient is greater than 0.999, and the lower limit of quantification is 0.002 mg / kg. The recoveries of spiked samples ranged from 96.2% to 103.6% at 0.005, 0.02 and 0.05 μg spiked levels with relative standard deviations of 2.8% -4.6%. The method is simple, accurate and sensitive. It can be used in leather and leather products (VI).