食品科学 ›› 2007, Vol. 28 ›› Issue (4): 252-254.

• 分析检测 • 上一篇    下一篇

催化光度法测定一次性纸杯浸泡液中痕量甲醛

 霍欢, 陈效兰, 陈波, 陈朝艳   

  1. 湘潭大学化学学院; 湛江出入境检验检疫局; 湘潭大学化学学院 湖南 湘潭 411105; 湖南 湘潭 411105; 广东 湛江 524022;
  • 出版日期:2007-04-15 发布日期:2011-12-31

Catalytic Spectrophotometric Determination of Trace Formaldehyde in Disposable Paper Cups

 HUO  Huan, CHEN  Xiao-Lan, CHEN  Bo, CHEN  Chao-Yan   

  1. 1.College of Chemistry,Xiangtan University,Xiangtan 411105,China; 2.Zhanjiang Entry-Exit Inspection and Quarantine Bureau,Zhanjiang 524022,China
  • Online:2007-04-15 Published:2011-12-31

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。

关键词: 甲醛, 催化光度法, 天青A, 一次性纸杯

Abstract: 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 formalde- hyde content.

Key words: formaldehyde, catalytic spectrophotometry, azur A, throw-away paper cups