环糊精敏化光度法测定废水中痕量汞(Ⅱ)  

Photosensitive Spectrophotometric Determination of Trace Mercury(Ⅱ) Based on Cadion 1B in the Presence of β-cyclodextrin

作　　者：吕鉴泉[1] 金焰[1] 徐凌云[1] 

机构地区：[1]湖北师范学院生化分析技术湖北省重点实验室,湖北黄石435002

出　　处：《分析科学学报》2006年第6期713-715,共3页Journal of Analytical Science

摘　　要：利用汞（Ⅱ）在伊环糊精存在下与镉试剂1B的显色反应，提出了测量痕量汞的新方法。在pH10的硼砂缓冲溶液、0．01％Triton X-100和0．001mol／Lβ环-糊精（β-CD）的存在下，镉试剂1B汞-（Ⅱ）在波长495nm处有最大吸收，其吸光度与0～2μg/10mL范围内的Hg（Ⅱ）呈线性关系，表观摩尔吸光系数为6．75×10^5L·mol^-1·cm^-1。本法灵敏度高、选择性较好，可用于废水中痕量汞的测定。A photosensitive spectrophotometry for the determination of trace mercury （ Ⅱ ） with Cadion 1B in the presence of β-cyclodextrin has been developed. Hg（ Ⅱ ） reacts quickly with Cadion 1B in the presence of suitable amounts of β-cyclodextrin at room temperature. The maximum absorbance appears at 495 nm. Beer＇s law is obeyed in the range of 0-0. 2 μg/mL with absorption coefficient of 6.75×10^5L·mol^-1·cm^-1. The method is highly selective and free from interference of common ions after cxtraction separation. The method has been successfully used to determine trace mercury （ Ⅱ） in wastewater.

关 键 词：敏化光度法 镉试剂 汞 环糊精 废水 

分 类 号：O657.32[理学—分析化学]