论文部分内容阅读
副玫瑰苯胺法测定食品中亚硫酸盐的改进王守娟赵憬一、原理食品中二氧化硫与甲醛缓冲溶液反应后，生成稳定的羟基甲基磺酸与盐酸副玫瑰苯胺作用生成紫红色化合物，与标准系列比较定量。二、仪器与试剂分光光度计。邻苯二甲酸氢钾－甲醛溶液：称取２．０４ｇ邻苯二甲酸氢钾...
Vice Rose aniline method for the determination of sulfite in food Wang Shoujuan Zhao Jingyi Principle The reaction of sulfur dioxide and formaldehyde buffer solution in food to produce stable hydroxymethyl sulfonic acid and pararosaniline hydrochloride produces purple compound with standard series More quantitative. Second, instruments and reagents spectrophotometer. Potassium hydrogen phthalate - formaldehyde solution: Weigh 2.04g potassium hydrogen phthalate ...