AHMT分光光度法测定废水中微量甲醛  

Determination of Microscale Formaldehyde in Wastewater by AHMT Spectrophotometry

作　　者：谢玉艳[1] 

机构地区：[1]广西现代职业技术学院资源工程系,广西河池547000

出　　处：《化工技术与开发》2013年第11期49-51,共3页Technology & Development of Chemical Industry

基　　金：广西2012年特色专业及课程一体化建设项目(GXTSZY302)

摘　　要：甲醛与4-氨基-3-联氨-5-巯基-1,2,4-三氮杂茂（简称AHMT）溶液在碱性条件下缩合，然后经高碘酸钾氧化成6-巯基-5-三氮杂茂（4,3-b）-S-四氮杂苯紫红色化合物，其颜色的深浅与甲醛含量成正比。方法的最大吸收波长为554nm，甲醛含量在0-12μg·10mL-1范围内具有良好的线性关系，相关系数为0.9959，用于测定有机实验废水中微量甲醛的含量，相对标准偏差为3.45%，加标回收率在95.4%-110.5%之间。Formaldehyde comdersed with 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole （hereinafter referred to as AHMT） in alkaline solution condition, and then oxidized by potassium periodate to 6-mercapto-5-triazole （4,3-b）-S-tetrazine purplish red compounds, the color depth was proportional to the content of formaldehyde. The maximum absorption wavelength was at 554 nm. Formaldehyde content in 0-12μg/10mL range had a good linear relationship, the correlation coefficient was 0.9959. The method was used to determine the content of trace formaldehyde in the organic experiment wastewater, the relative standard deviation was 3.45%（n=5）, the recovery of standard addition was 95.4%-110.5%.

关 键 词：分光光度法 AHMT 测定 废水 甲醛 

分 类 号：O657.32[理学—分析化学]