滤膜中锡样品原子吸收测定法前处理方法改进研究  

Improvement of sample pretreatment for measurement of airborne tin and its compounds by use of AAS

作　　者：郭晓婧[1] 郭嘉明[1] 梁嘉斌[1] 陈纠[1] 刘移民[1,2] 

机构地区：[1]广州市职业病防治院,广东广州510620 [2]中山大学公共卫生学院,广东广州510080

出　　处：《职业卫生与应急救援》2015年第4期238-239,256,共3页Occupational Health and Emergency Rescue

基　　金：广东省"十二五"医学重点专科(编号:粤卫函[2012]20号);广州市医学重点学科建设项目(编号:穗卫科[2013]21号);广州市职业环境与健康效应实验室建设项目(编号:2014SY000020);广州市民生科技重大项目(编号:2014Y2-00067)

摘　　要：目的对《工作场所空气有毒物质测定锡及其化合物》(GBZ/T 160.22-2004)所使用的前处理方法进行调整改进,建立简便、准确的试验方法。方法参照GBZ/T 160.22-2004方法,测定、计算滤膜中锡的质量;取1.0 m L浓盐酸(优级纯)和采样后的滤膜置于具塞比色管中,置50℃水浴中消解滤膜,测定、计算滤膜中锡的质量。对两种试验方法进行对比。结果改进前,滤膜样品锡的回收率在50.0%以下,改进后回收率均在99.0%以上。结论经调整改良后的前处理方法操作简便,回收率高,同时能减少对试验人员的伤害和酸污染的形成。Objective To seek improvements of the sample pretreatment of current method GBZ/T 160.22-2004 for determination of tin and its compounds in the air of workplace so as to establish a method of higher efficiency and accuracy. Methods The tin content on the filter membranes was determined respectively by the current method GBZ/T 160.22-2004 as well as the improved method with new sample pretreatment procedures. Filter membrane was digested in a covered-tube within 1.0 m L concentrated hydrochloric acid in water bath of approximate 50 ℃. Results The recovery rate of the current method GBZ/T 160.22-2004 was below 50.0% while that of the improved one was over 99.0%. Conclusion The improved method with new sample pretreatment procedure is more convenient for operation and receives higher recovery,Furthermore,this new pretreatment procedure reduces the harm both to lab operators and to the environment.

关 键 词：锡 滤膜 前处理 原子吸收分光光度法 浓盐酸 

分 类 号：O657.31[理学—分析化学]