表面活性剂增敏光度法测定水样中的微量铁  

Determination of Micro Fe(Ⅱ)in the Water Sample by Surface Active Agent Increasing Sensitivity Spectrophotometry

作　　者：梁国柱[1] 

机构地区：[1]南通职业大学化学工程系,江苏南通226007

出　　处：《南通职业大学学报》2005年第2期29-31,共3页Journal of Nantong Vocational University

摘　　要：在HAc-NaAc缓冲溶液(pH=5)存在下,以邻二氮菲(phen)作显色剂,表面活性剂曲拉通X-100对Fe(Ⅱ)与邻二氮菲的显色反应具有增敏作用,形成的Fe(Ⅱ)-phen-Triton三元络合物呈红色,络合物的最大吸收波长为510 m,表观摩尔吸光系数为1.2×105 L·mol-1·cm-1,铁含量在0.5～12μg/mL范围内符合比尔定律,用于水样中微量铁的测定,回收率在97.1%～98.0%之间.In the HAc-NaAc buffer solution(pH=5),the color reaction Fe(Ⅱ)with Phenathroline(Phen)in Triton is sensitized,the stationary ternary complex Fe(Ⅱ)-Phen-Triton is Red,the maxiˉmum absorption of the complex is at510nm,and the apparent molor absorptivity of the complex is1.2×10 5 L.·mol -1 .cm -1 .Beer's law is obeyed for Fe(Ⅱ)in the range of0.5～12mg/ml,and the linear regression equation is A=0.437c(mg/l)+0.036.This method can be applied to deterˉmine Micro Fe(Ⅱ)in the water sample.The percentage of recovery ranges from97.1%to98%.

关 键 词：分光光度法 邻二氮菲 铁 表面活性剂 曲拉通X-100 

分 类 号：O652[理学—分析化学]