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  

Catalytic Kinetic Spectrophotometric Determination of Trace Formaldehyde in Beverage

作　　者：方夏[1] 黄余改[1] 李玲玲[1] 曹连云[1] 

机构地区：[1]江苏教育学院化学系,江苏南京210013

出　　处：《食品科学》2009年第6期199-202,共4页Food Science

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。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.

关 键 词：催化反应 动力学分光光度法 甲醛 天青Ⅰ 

分 类 号：TS275[轻工技术与工程—农产品加工及贮藏工程]