光度法测定水中溴化十六烷基三甲铵  

PHOTOMETRIC DETERMINATION OF CTMAB WITH THE REAGENT 2-HYDROXY-5-SULFOPHENYLAZO-BENZYLIDENEHYDRAZINO- 2′-CARBOXYBENZENE (HSPABHCB)

作　　者：迟燕华[1] 庄稼[1] 白进伟[1] 

机构地区：[1]西南科技大学材料科学与工程系,绵阳621002

出　　处：《理化检验（化学分册）》2004年第4期198-199,共2页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：研究采用光度法,在pH5.0的缓冲溶液中,2 羟基 5 磺苯偶氮苯亚甲基肼基 2′ 羟基苯(R)与溴化十六烷基三甲铵(CTMAB)相互作用,当向R中加入CTMAB,立即生成红色配合物,其最大吸收峰为540和570nm;摩尔吸光系数ε=2.2×104L·mol-1·cm-1。由此建立了高灵敏度的吸光光度法测定水中微量的CTMAB。试验了该体系的酸度、温度、时间、浓度等最佳反应条件。在0.005×10-5～2.2×10-5mol·L-1浓度范围内呈良好的线性关系。检出限为1μg·ml-1。In a B-R buffer solution of pH 5.0, and upon the addition of CTMAB solution to the solution of the reagent 2-hydroxy-5-sulfophenylazo benylidene hydrazino-2′-carboxybenzene, a red coloration was observed at the wave lengths of 540nm and 570nm. The molar absorptivity (ε) was found to be 2.2×10~4L·mol^(-1)·cm^(-1). Linear relationship was found between the absorbance of the red color and the concentration of CTMAB in the range of 0 005×10^(-5)～2.2×10^(-5)mol·L^(-1). Its detection limit was 1μg·ml^(-1). The proposed method has been satisfactorily used in the determination of CTMAB in water. Recoveries obtained were in the range from 92% to 104%.(

关 键 词：水分析 溴化十六烷基三甲铵 表面活性剂 光度法 2-羟基-5-磺苯偶氮苯亚甲基肼基-2’-羟基苯 

分 类 号：O661.1[理学—分析化学] O657.3[理学—化学]