固体吸附管采样-离子色谱法检测空气中二氧化氮含量

摘要

Nitrogen dioxide in air was collected by molecular sieve solid adsorption tube, and then determined by ion chromatography. The results showed that the detection limit was 0.007 mg/m3 and the lower limit was 0.028 mg/m3 when the sampling volume was 48 L. The desorption efficiency is between 92.41％ and 99.97％, and the penetration capacity is more than 471.0 ug. It can be seen that solid adsorption tube sampling-ion chromatography can better realize the determination of nitrogen dioxide in air.%采用分子筛固体吸附管采集空气中的二氧化氮样品, 再借助离子色谱法来进行测定.结果表明, 当采样体积为48L时, 方法检出限为0.007mg/m3, 测定下限为0.028mg/m3.解吸效率在92.41％～99.97％之间, 穿透容量>471.0μg, 可见固体吸附管采样—离子色谱法可较好的实现对空气中二氧化氮的测定.