离子色谱法测定空气中氟化氢氯化氢和硫酸

摘要

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0mg/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％.%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 efficiency >92% ; 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/T, to 4. 00 mg/ for sulphuric acid; detection limits 0.003 mg/m 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%.