一种配制低浓度甲醛标准气体的新方法  

A new method of generating low concentration of standard formaldehyde

作　　者：刘国云[1] 于慧芳[2] 郝永建[1] 张锐[2] 

机构地区：[1]中国人民解放军96615部队 [2]北京市疾病预防控制中心环境卫生所

出　　处：《中国卫生检验杂志》2012年第1期35-36,共2页Chinese Journal of Health Laboratory Technology

摘　　要：目的:建立一种配制低浓度甲醛标准气体的方法。方法:配制1+1甲醛溶液,置于D-10扩散管中,配合应用PD-1B-2标准气体发生装置,在一定条件下发生恒定低浓度范围甲醛气体,应用酚试剂法进行测定。结果:相同条件下发生的甲醛气体经酚试剂法测定,气体浓度基本一致。结论:该方法发生的甲醛气体经化学法定值后可以作为标准气体使用,且操作简便,样品试剂低廉,实验成本低。Objective： To establish a method of generating low concentration of standard formaldehyde. Methods： 1 ＋ 1 formalin solution was made up and added into D - 10 diffusion tube, low concentration of constant formaldehyde was produced within given condition by calibration gas generation system with the D - 10 diffusion tube. The formaldehyde was tested by MBTH spectrophotometric method. Results： Different batches of formaldehyde produced in the same condition was determined by MBTH spectrophotometric method and the gas concentrations were much the same. Conclusion： Formaldehyde produced with this method can be used as standard gas after it was determined by chemical methods. This method is easy and cheap.

关 键 词：甲醛 标准气体 酚试剂法 

分 类 号：R122.2[医药卫生—环境卫生学]