催化光度法测定一次性纸杯浸泡液中痕量甲醛  

Catalytic Spectrophotometric Determination of Trace Formaldehyde in Disposable Paper Cups

作　　者：霍欢[1] 陈效兰[1] 陈波 陈朝艳[1] 

机构地区：[1]湘潭大学化学学院,湖南湘潭411105 [2]湛江出入境检验检疫局,广东湛江524022

出　　处：《食品科学》2007年第4期252-254,共3页Food Science

基　　金：湖南省教育厅基金项目(05C082)

摘　　要：基于在一定温度和硫酸介质中,痕量甲醛对溴酸钾氧化天青A有较强的催化作用,建立了测定痕量甲醛的新的催化光度法。方法的线性范围为0．045～0．56mg/L,检出限为0．019mg/L。对0．11mg/L的甲醛标准溶液11次测定的相对标准偏差为0．38%。用于一次性纸杯浸泡液中甲醛含量的检测,发现纸杯浸泡液中甲醛含量较少,可以安全使用。Based on the catalytic effects of trace formaldehyde on the reaction between potassium bromate and oxidized azur A, a new catalytic spectrophotometric method has been developed in this paper. The detection limit is 0.019 mg/L with linear range of 0.045-0.56 mg/L. The RSD （relative standard deviation） is 0.38%. This method has been applied for the detection of trace formaldehyde in disposable paper cups. The results showed that the paper cups can be used safely, with little formaldehyde content.

关 键 词：甲醛 催化光度法 天青A 一次性纸杯 

分 类 号：O657.32[理学—分析化学]