摘要
吊白块在使用过程中可分解甲醛和二氧化硫,先用亚硫酸品红分光光度法测定样品中甲醛含量,再用盐酸副玫瑰苯胺法测定二氧化硫的含量,通过计算两者质量比是否接近1:2.1判断吊白块的存在。建立了样品快速处理方法,并对方法的线性、精密度和回收率进行了评价,可用于实际样品的分析。
Sodium formaldehyde sulfoxylate can break down into formaldehyde and sulfur dioxide in process of using. First, the contents of the formaldehyde in food were determined by fuchsine-sulphurousacid spectrophotometry and the sulphur dioxide samples were determined by pararosaniline hydrochloride method. Then the mass ratio of the formaldehyde to the sulphur dioxide was calculated, If the mass ratio is near 1：2.1, sodium formaldehyde sulfoxylate exists in samples. The fast sample preparation method was developed. The linearity, precision and recovery of the method were evaluated. The experimental results proved it may be applied to determine actual samples.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2008年第9期455-457,共3页
Food Science
关键词
食物
吊白块
甲醛
亚硫酸盐
分光光度法
food
sodium formaldehyde sulfoxylate
formaldehyde： sulfite
spectrophotometry
