工作场所空气中铅及其化合物的氢化物发生-原子荧光光谱测定法  

Determination of lead and its compounds in the air of workplace by hydride generation-AFS

作　　者：何洪亮 

机构地区：[1]天津市西青区疾病预防控制中心,300380

出　　处：《职业与健康》2014年第10期1337-1338,1341,共3页Occupation and Health

摘　　要：目的建立氢化物发生原子荧光光谱法测定空气中铅及其化合物的方法。方法用微孔滤膜采集空气样品,经高氯酸-硝酸（1＋9）加热消解后,以去离子水定容,通过氢化物原子荧光光谱法测定铅及其化合物的含量。结果该方法线性范围为0-160 ng/ml,检出限为0.1 ng/ml,RSD为0.56%-2.17%,相对误差为0.47%-1.30%。结论采用盐酸浓度1%（体积分数）,铁氰化钾浓度0.8%（质量浓度）,氢氧化钠浓度0.36%（质量浓度）,反应液pH值在8、9之间,荧光强度稳定。该法精密度和准确度高。测定标准物质结果在控制限范围内,该方法可以用于测定工作场所空气中铅及其化合物。[Objective]To establish a method for determination of lead and its compounds in the air of workplace by hydride generation-AFS.[Methods]The air samples were collected with microporous membrane,digested by perchloric acid-nitric acid（ 1 ＋ 9） with heating,and constant volume with deionized water,then the lead and its compounds were determined with the hydride generation-AFS.[Results] The linear range of this method was 0-160 ng / ml,thedetection limit was 0. 1 ng / ml,RSD ranged from 0. 56%-2. 17%,relatively error was 0. 47%-1. 30%. [Conclusion] Hydrochloric acid concentration 1%（ volume fraction）, potassium ferricyanide concentration 0. 8%（ mass concentration）,sodium hydroxide concentration 0. 36%（ mass concentration）, pH of waste liquid ranges from 8-9,the fluorescence intensity is steady. The method has high precision and accuracy. The determination results of standard substance are within control limit. This method is suitable for the determination of lead and its compounds in the air of workplace.

关 键 词：氢化物发生-原子荧光光谱法 空气 铅及其化合物 

分 类 号：R115[医药卫生—公共卫生与预防医学]