居住区大气中挥发酚类化合物的流动注射测定法研究

Flow injection analysis method for hygienic examination of volatile phenol compounds in the air of residential area

目的建立居住区空气中挥发酚类化合物的流动注射测定方法。方法用多孔玻板吸收管以0.1mol/L的氢氧化钠溶液作为吸收液对大气中挥发酚类化合物进行采样,以流动注射分析仪对吸收液进行分析,样品溶液在线蒸馏后在氧化剂存在下,与4-氨基安替比林反应,于510nm处进行比色分析。结果本方法在0～1500μg/L范围内呈线性关系;样品在4℃冰箱中至少可保存7天;方法重现性好,不同浓度的相对标准偏差为0.84%～1.0%,方法加标回收率为100.3%～103.3%,方法检出限为0.0003mg/m3,方法线性范围为0.0009～0.25mg/m3,采样效率为96.1%～97.2%。结论该方法各项性能指标均能达到空气中酚类化合物测定需求。

Objective To establish a flow injection analysis for hygienic examination of volatile phenol compounds in the air of residential area.Method Volatile phenol compounds in the air was sampled by a fritted glass bubbler with 10ml 0.1 mol/L sodium hydroxide inside and analyzed by a flow injection analyzer.The samples were reacted with 4-aminoantipyrine after online distillation in the presence of potassium ferricyanide.Results There was a linear relationship in the range of 0-1500μg/L.The samples could be stored in a 4℃ refrigerator at least for 7 days.This method showed a high reproducibility with relative standard deviations of 0.84%-1.0%.The recoveries of standard addition of the method were 100.3%-103.3%.The detection limit was 0.0003mg/m3 and the linear range was 0.0009-0.25mg/m3.The absorption efficiencies were 96.1%-97.2%.Conclusion This method meets the requirements for the analysis of volatile phenol compounds in the air of residential area.