吖啶橙分光光度法测定水中痕量二氧化氯  

Spectrophotometric Determination of Trace Chlorine Dioxide in Water Using Acridine Orange

作　　者：梁爱惠[1] 蒋治良[1] 

机构地区：[1]桂林工学院材料与化学工程系,广西桂林541004

出　　处：《桂林工学院学报》2007年第1期125-127,共3页Journal of Guilin University of Technology

基　　金：广西自然科学基金资助项目(桂科青0575042)

摘　　要：在pH=10．5的NH4Cl—NH，缓冲溶液中，吖啶橙在275与490nm波长处有2个吸收峰．当加入ClO2后，2个吸收峰均降低，在490nm波长处的吸光度降低值与ClO2浓度在0．080—5．0μg／mL范围成良好线性关系，ClO2检出限（3σ）为0．04μg／mL．据此建立了一种灵敏、简便、快速、准确、选择性测定痕量ClO2含量的分光光度法，用于水样分析，结果满意．In pH 10. 5 NH4Cl-NH3 buffer solutions, there are two absorption peaks at 275 and 490 nm for acridine orange. When chlorine dioxide is added, the two peaks decreased sharply,showing that the decreased absorbance value at 490 nm is linear to chlorine dioxide concentration in the range of 0. 080 - 5.0 μg/mL. The detection limit（3σ） is 0. 04μg/mL ClO2. A new spectrophotometric method is proposed for the determination of ClO2 in sample water,with the advantages of high sensitivity, selectivity, simplicity, rapidity and accuracy.

关 键 词：二氧化氯 吖啶橙 分光光度法 

分 类 号：O657.3[理学—分析化学]