摘要
在H2SO4介质中,甲醛对溴酸钾氧化铬天青S的褪色反应有催化作用,据此建立了催化光度法测定甲醛的新方法。该方法的线性范围为0.12～1.01 mg/L,检出限为0.012 mg/L。该方法用于腐竹、木耳和八渡笋等水发食品中甲醛的测定,测定结果的相对标准偏差RSD均小于5%(n=7),回收率为96.2%～103.8%,可满足食品中甲醛的测定要求。
A new catalytic spectrophotometry on determination of formaldehyde has been developed, which was based on the catalytic effect of formaldehyde on the discoloring oxidation reaction between potassium bromate and chromazurol S in H2SO4 medium. The linear range of determination was 0.12-1.01 mg/L and the detection limit was 0.012 mg/L. This method has been applied to determine formaldehyde in water-soaked foodstuffs such as dried beaneurd stick, black fungus, bamboo shoot and RSD was less than 5%（n=7）, recovery was between 96.2%-103.8%. This method can satisfy the requirements of determinating formaldehyde in food.
出处
《广东农业科学》
CAS
CSCD
北大核心
2013年第20期116-118,共3页
Guangdong Agricultural Sciences
基金
广州大学-百色学院合作科研项目(GBK2010009)
百色学院校级大学生创新创业训练计划项目(2013CX54)
关键词
催化光度法
铬天青S
甲醛
溴酸钾
catalytic spectrophotometry
chromazurol S
formaldehyde
potassium bromate
作者简介
作者简介：刘细祥（1983-），男，硕士，讲师，E-mail：liuxixiang2008@qq．com
