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采用离子色谱电导检测法测定皮革制品中Cr(Ⅵ),选用Metrohm 861型离子色谱仪,Metrosep A Supp5-150型阴离子分析柱,12.8 mmol/L Na2CO3+4.0 mmol/L NaHCO3淋洗液.在10~100μg/L范围内,Cr(Ⅵ)的浓度与色谱峰面积呈线性关系,线性方程为C×100=2893.72×A+200.136,相关系数为0.999 0,最低检测浓度为4μg/L,低、中、高三个浓度的精密度分别为1.60%、1.05%、0.65%,样品加标回收率分别为91.5%、93.6%和92.3%,本方法可用于皮革中Cr(Ⅵ)的测定.
Determination of Cr (Ⅵ) in leather products by ion chromatography with conductivity detection method, using Metrohm 861 ion chromatography, Metrosep A Supp5-150 anion analysis column, 12.8 mmol / L Na2CO3 + 4.0 mmol / L NaHCO3 eluent at 10 The linear equation was C × 100 = 2893.72 × A + 200.136, the correlation coefficient was 0.999 0, the lowest detection concentration was 4μg / L, the concentration of Cr (Ⅵ) The precision of the three concentrations was 1.60%, 1.05% and 0.65% respectively. The spiked recoveries were 91.5%, 93.6% and 92.3% respectively. The method can be used for the determination of Cr (Ⅵ) in leather.