离子色谱法测定空气中氟化氢氯化氢和硫酸

以多孔玻板吸收管采样,采用离子色谱法同时测定作业场所空气中的氟化氢、氯化氢和硫酸,采样效率>92%。氟化氢在0 mg/L～2.00 mg/L、氯化氢在0 mg/L～2.50 mg/L、硫酸在0 mg/L～4.00 mg/L范围内线性良好,检出限分别为0.003 mg/m3、0.02 mg/m3、0.023 mg/m3(按采样体积60 L计),标准溶液平行测定的RSD≤8.0%,两个质量浓度水平加标的平均回收率为92.6%～106%。

Determination for Hydrogen Fluoride, Chlorine Hydride and Sulphuric Acid in the Air by Ion Chromatography

The hydrogen fluoride,chlorine hydride and sulphuric acid in the air were determined by sampling of multi-hole absorbing tubes and testing of ion chromatography.The results showed the sampling efficiency92%;good linearity ranged from 0 mg/L to 2.00 mg/L for hydrogen fluoride,from 0 mg/L to 2.50 mg/L for chlorine hydride,from 0 mg/L to 4.00 mg/ for sulphuric acid;detection limits 0.003 mg/m3 for hydrogen fluoride,0.02 mg/m3 for chlorine hydride and 0.023 mg/m3 for sulphuric acid（air sampling volume 60 L）;RSD of standard solution duplicates≤8.0%;average spiked recoveries of two concentration levels from 92.6% to 106%.