快速测定微量甲醛的新方法——光度测定法研究  

A new spectrophotometric method for instant determination of trace formaldehyde

作　　者：陈辉东[1] 赵志辉 郑修文[1] 杨明敏[1] 

机构地区：[1]南京农业大学理学院,江苏南京210095 [2]上海市饲料质量监督检验站,上海201106

出　　处：《南京农业大学学报》2003年第1期82-84,共3页Journal of Nanjing Agricultural University

基　　金：上海市科委"肉制品安全检测方法研究"项目

摘　　要：在FeCl3 HCl存在条件下 ,甲醛与蛋白胨能产生紫色 ,可以定量测定微量甲醛。测定范围 0 1～ 1 0mg·L-1,回收率 95 0 8%～ 10 3 5 % ,相对标准差为 1 19% (n =6 )。与乙酰丙酮法相比 ,用该法测定水发虾仁中甲醛含量 ,全程只需 10min ,具有简单、快速、灵敏度高、使用试剂少等优点 。A new method is studied for the determination of trace formaldehyde in food based on its reaction with peptone in the medium of FeCl 3 and HCl solution to form strongly a purple compound.It′s absorption is proportional to formaldehyde concentration in the range of 0 11 0 mg·L -1 .The recoveries are 95 08%103 5%.The relative standard deviation is 1 19% ( n =6).In contrast with national standard method,the new method is more sensitive and convenience,requiring less reagent,and it takes only 10 minutes for the whole determination process.This method is good for formaldehyde determination in site,and has been used to determine formaldehyde in shelled shrimps

关 键 词：微量甲醛 光度测定法 蛋白胨 防腐剂 

分 类 号：TS202.3[轻工技术与工程—食品科学] O657.3[轻工技术与工程—食品科学与工程]