食品科学 ›› 2009, Vol. 30 ›› Issue (6): 199-202.doi: 10.7506/spkx1002-6630-200906045

• 分析检测 • 上一篇    下一篇

溴酸钾- 天青I 体系催化动力学光度法测定饮料中的痕量甲醛

方 夏,黄余改,李玲玲,曹连云   

  1. 江苏教育学院化学系
  • 收稿日期:2008-03-24 修回日期:2008-06-16 出版日期:2009-03-15 发布日期:2010-12-29
  • 通讯作者: 方夏 E-mail:fxqpliu@163.com

Catalytic Kinetic Spectrophotometric Determination of Trace Formaldehyde in Beverage

FANG Xia,HUANG Yu-gai,LI Ling-ling,CAO Lian-yun   

  1. (Department of Chemistry, Jiangsu Institute of Education, Nanjing 210013, China)
  • Received:2008-03-24 Revised:2008-06-16 Online:2009-03-15 Published:2010-12-29
  • Contact: FANG Xia, E-mail:fxqpliu@163.com

摘要:

在稀盐酸溶液中,甲醛对溴酸钾氧化天青Ⅰ的褪色反应有催化作用,研究其反应动力学条件,建立测定痕量甲醛的动力学光度分析法,该方法的线性范围为0.20~6.00μg/ml,该法用于饮料和河水中痕量甲醛的测定,获得了满意的结果。

关键词: 催化反应, 动力学分光光度法, 甲醛, 天青Ⅰ

Abstract:

A kinetic spectrophotometric method for determination of trace formaldehyde in beverage was proposed based on the catalytic effect of formadehyde on the discoloration reaction of azure I oxidized by potassium bromate in hydrochloric acid. The linear range is 0. 20 to 6.00 μg/ml. The method has been used to determine the formaldehyde in saled carbonated beverage and in pond water from river samples with satisfying results.

Key words: catalytical reaction, kinetic spectrophotometery, formaldehyde, azure Ⅰ

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