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采用了单柱离子色谱法测定ＭｎＯ＿２产品中无机阴离子杂质；提出了消除干扰的可行途径，将ｌａ（ＯＨ）＿３加入后能同时消除进样峰的干扰和溶剂峰的出现。选用１．７５ｍｍｏｌ／Ｌ邻苯二甲酸－１．７５ｍｍｏｌ／Ｌ三羟甲基氨基甲烷为混合淋洗剂测定Ｆ￣－、Ｃｌ￣－、和，其标准加入回收率为９５％～１０５／；ＲＳＤ（ｎ＝７）为２．４７％～８．０８％。
Single column ion chromatography was used to determine inorganic anion impurities in MnO 2 product. A feasible way to eliminate the interference was proposed. Adding la (OH) 3 can eliminate the interference of peak and the appearance of solvent peak simultaneously. Select 1.75mmol / L phthalic acid -1.75mmol / L tricyclic hydroxymethyl aminomethane as a mixed eluent measured F ~ -, Cl ~ -, and its standard addition was 95% ~ 105 /; RSD (n = 7) was 2.47% ~ 8.08%.