溴百里香酚蓝-过氧化氢体系催化动力学光度法测定痕量甲醛  

Catalytic kinetic spectrophotometric determination of trace formaldehyde by bromine thyme phenol blue and hydrogen peroxid

作　　者：秦建芳[1] 吴伟丽 弓巧娟[1] 秦英恋 姚陈忠[1] 任丽娜[1] 

机构地区：[1]运城学院应用化学系,山西运城044000 [2]康杰中学,山西运城044000

出　　处：《应用化工》2016年第7期1385-1388,共4页Applied Chemical Industry

基　　金：国家自然科学基金(21576230);山西省普通本科高校教育教学改革研究重点项目(J2014103);山西省化学特色建设专业;运城学院产学研合作研究项目(CY-2015015)

摘　　要：基于在盐酸介质中,甲醛对过氧化氢氧化溴百里香酚蓝的褪色反应有明显的促进作用,建立了测定粉丝中痕量甲醛的新方法。在最优条件下,甲醛含量在0.4~1.6μg/m L内与体系的吸光度呈良好的线性关系,检出限为0.29μg/m L。通过11次平行测定0.4μg/m L甲醛标准溶液,得到相对标准偏差（RSD）为2.56%,加标回收率为99.6%~103.1%。该法灵敏度高,选择性好,方便快捷。In acid medium,formaldehyde had obvious promoting effect for the oxidation fading reaction between bromine thyme phenol blue and hydrogen peroxide. A new catalytic-kinetic spectrophotometric method was established for the determination of trace formaldehyde. The affecting factors were inspected.Under the optimal conditions,the formaldehyde concentration had a good linear relationship within a range of 0. 4 ~ 1. 6 μg / m L. The detection limit was 0. 29 μg / m L,and the relative standard deviation（ RSD） was2. 56% for determining formaldehyde standard solution（ n = 11）. This method was suitable for the detection of trace formaldehyde in vermicelli. The spike recoveries were 99. 6% ~ 103. 1%. The method had high sensitivity and selectivity.

关 键 词：催化动力学光度法 甲醛 溴百里香酚蓝 过氧化氢 粉丝 

分 类 号：TQ420.7[化学工程] O657.3[理学—分析化学]