碳酸根对离子色谱法测固定污染源氯化氢影响探讨

Discussion on the Influence of Carbonate on the Determination of Hydrogen Chloride in Stationary Pollution Source By Ion Chromatography

探讨了离子色谱仪在配套使用AS15柱测定固定污染源废气中氯化氢时,在有无二氧化碳捕获柱的情况下,碳酸根对氯化物检出限、精密度及准确度的影响。结果表明:在没有捕获柱时,氯化物检出限为0.63 mg/m^(3),相对标准偏差为12.5%,实际样品加标回收率为135%;而在有二氧化碳捕获柱时,氯化物的检出限为0.19 mg/m^(3),相对标准偏差为3.51%,实际样品加标回收率为104%。进而得出,离子色谱法使用AS15柱测定废气中氯化氢时,碳酸根的影响巨大,是保证实验准确性、客观性必须消除的干扰。

This paper discusses the influence of carbonate on the detection limit,precision and accuracy of chloride when using AS15 column to determine hydrogen chloride in waste gas by ion chromatography with or without carbon dioxide capture column.Without a capture column,the detection limit of chloride is 0.63 mg/m^(3);the relative standard deviation is 12.5%,and the recovery rate of the actual sample is 135%.With carbon dioxide capture column,the detection limit of chloride is 0.19 mg/m^(3);the relative standard deviation is 3.51%,and the recovery rate of the actual sample is 104%.Therefore,when using AS15 column to determine hydrogen chloride in waste gas by ion chromatography,the influence of carbonate is huge,which is the interference that must be eliminated to ensure the accuracy and objectivity of the experiment.