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
出处
《南京农业大学学报》
CAS
CSCD
北大核心
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
