食品中甲醛合次硫酸氢钠的现场快速定性检测  

On-site rapid qualitative detection of sodium formaldehyde sulfoxylate in food

作　　者：崔杰 云环 刘鑫 Cui Jie;Yun Huan;Liu Xin(Beijing Customs Tian Shui Yuan Office Aera,Beijing 100026,China)

机构地区：[1]北京海关甜水园办公区,北京100026

出　　处：《分析仪器》2018年第6期41-45,共5页Analytical Instrumentation

摘　　要：采用盐酸副玫瑰苯胺分光光度法,对可能添加甲醛合次硫酸氢钠(吊白块)的食品,如腐竹、粉丝和竹笋进行甲醛合次硫酸氢钠的现场快速定性检测。方法原理为甲醛合次硫酸氢钠水溶液在酸性条件下分解出等物质的量的甲醛与二氧化硫,甲醛再与二氧化硫结合成羟甲基磺酸,再与盐酸副玫瑰苯胺反应。避免了传统方法单一检测甲醛合次硫酸氢钠分解出的甲醛或二氧化硫造成的假阳性率高的问题。该检测方法简单、快捷,能够满足现场快检的需要,检出限为5mg/kg。In this paper, the pararosaniline hydrochloric spectrophotometry was adopted for on site rapid qualitative detection of sodium formaldehyde sulfoxylate（rongalite）. The problem of high false posi rive rate caused by single analysis of formaldehyde or sulfur dioxide decomposed from sodium formaldehyde sulfoxylate was avoided by using the method. The detection limit was 5 mg/kg. The method is simple and fast, can meet the need of on site rapid detection.

关 键 词：甲醛合次硫酸氢钠 吊白块 食品 定性 快速检测 

分 类 号：TS207.3[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]