变色酸分光光度测定塑料中甲醛和六亚甲基四胺在食品模拟物中的迁移量的改进方法  

Developed test method of migration of formaldehyde and hexamethylenetetramine from platics into food simulants by spectrophotometry with chromotropic acid

作　　者：陈少鸿[1] 刘在美[1] 朱晓艳[1] 陈建国[1] 

机构地区：[1]宁波出入境检验检疫局,宁波315012

出　　处：《食品科技》2009年第4期259-261,共3页Food Science and Technology

摘　　要：考察了变色酸与甲醛的显色反应和六亚甲基四胺(HMTA)转化成甲醛的反应条件的影响并进行优化,改进了变色酸分光光度测定塑料中甲醛和HMTA(以甲醛计)在乙酸溶液中的迁移量的方法,其校准曲线线性范围(0～15)mg/L,检出限0.17mg/L,HMTA对甲醛的转化率为(99.5～100)%。由8家实验室对水平为10.3mg/L(含HMTA)和7.28mg/L(不含HMTA)的样品进行协同实验,其重复性限r分别为0.434和0.159mg/L,再现性限R分别为2.487和1.707mg/L。The conditions in the color reaction of chromotropic acid with formaldehyde and conversion of hexamethylenetetramine（HMTA） to formaldehyde were studied and optimized. A spectrophotometry with chromotropic acid has been developed for the determination of migration of formaldehyde and HMTA （as formaldehyde）in acetic acid solution. The linear range of calibration curve is 0-15 mg/L, and the detection limit of the method is 0,17 mg/L. The conversion rate of HMTA to formaldehyde is （99.5-100）%. A collaborative trial was caryyed out by eight laboratories with samples having level of 10.3 mg/L （containing HMTA） and of 7.28 mg/L （without HMTA）. The repeadility limit are 0.434 and 0.159 mg/L, and the reproducibility limit are 2.487 and 1.707 mg/L, respectively.

关 键 词：甲醛 六亚甲基四胺 变色酸 分光光度法 迁移 

分 类 号：O657.32[理学—分析化学] TS207.5[理学—化学]