离子色谱法同时测定空气中HF、HCl、H3PO4和H2SO4的研究

目的探讨一次采样同时测定工作场所空气中氟化氢、氯化氢、磷酸和硫酸的方法。方法以碳酸钠-碳酸氢钠溶液作淋洗液和样品吸收液,用多孔玻板吸收管采样,经色谱柱分离,电导检测器-离子色谱仪检测,保留时间定性,峰高或峰面积定量。结果方法采样效率大于95%,相对标准偏差（RSD）为1.9%～5.6%,加标回收率为95.1%～102.3%,该法与化学法比较,差异无统计学意义。结论该法操作简便,灵敏度高,精密度好,一次88采样能同时分析出工作场所空气中氟化氢、氯化氢、磷酸和硫酸。

Study on Determination of HF,HCl,H3 PO4 and H2 SO4 in Air Simultaneously by Ion Chromatographic

[ Objective] To develop a method for the determination of HF, HCI, H3PO4 and H2 SO4 in the air of workplace simultaneously. [ Methods] A mixed solution of Na2CO3 and NaHCO3 were used as eluent and absorbing solution for the air sample. The samples were collected with multi-hole absorbing tubes, then separated in column after filtering and detected with conductivity detec- tor, qualitatively controlled by elution time and quantitatively controlled by peak height or peak area. [ Results] The efficiency of samples collecting was 〉95% , the relative standard deviation （ RSD） was 1.9% -5.6% and the rate of recovery was 95.1% 102.3%. There was no significant difference between this method and chemical method. [ Conclusion] This method is simple, sensitive and precise. It is adapt to collecting and detecting simultaneously for HF, HC1, H2PO4 and H2SO4 in workplace air.