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本文较系统地研究了离子色谱法对SeO_3~(2-).CrO_4~(2-)的分析实验条件,选择紫外检测器(波长254nm)以7.5mmolNa_2CO_3和2.0mmolNaoH为双组分淋洗液,在此条件下,对SeO_3~(2-)5ppm,CrO_4~(2-)10ppm混合标准液进行分析,标准偏差、变异系数均在仪器允许范围内,且线性关系较好,检出限Seo_3~(2-)0.031ppmCrO_4~(2-)为0.074ppm以标准加入法测得回收率为Seo_3~(2-).98%.CrO_4~(2-)101%.
In this paper, the analytical conditions of SeO_3 ~ (2 -). CrO_4 ~ (2-) ion chromatography were systematically studied. The UV detector (wavelength 254nm) was selected to be 7.5mmolNa_2CO_3 and 2.0mmolNaoH as two- Under these conditions, the standard deviation of the SeO_3 ~ (2-) 5ppm, CrO_4 ~ (2-) 10ppm mixed standard solution are within the allowable range of the instrument, and the linearity is good. The detection limits of Seo_3 ~ (2-) The 0.031ppm 0.031ppmCrO_4 ~ (2-) is 0.074ppm The recovery rate is Seo_3 ~ (2 -). 98% .CrO_4 ~ (2-) 101% measured by standard addition method.