光度法测定有机溶剂中微量水  

Determination of micro amount of water in organic solvents by spectrophotmetry

作　　者：黄薇[1] 

机构地区：[1]山东枣庄师范专科学校化学系,山东枣庄277160

出　　处：《化学研究与应用》2004年第3期425-426,共2页Chemical Research and Application

摘　　要：The reaction between 7,7,8,8-tetracyanoquinodimethane(TCNQ)and water in organic solvents was studied.TCNQ and water complex has strong molar absorptivity at 744nm and 840nm.The linear range is 0～7.0%(V/V)or 0～8.0%(V/V)for the determination of water in methanol,ethanol,n-propyl alcohol,2-propanol.The results for ethanol were in agreement with standard results. The recoveries of water in n-propyl alcohol and 2-propanol were 96.6%～101% and 98%～102%,respectively.This is a simple,sensitive and reproducible method for determining water in organic solvents.The reaction between 7,7,8,8-tetracyanoquinodimethane(TCNQ)and water in organic solvents was studied.TCNQ and water complex has strong molar absorptivity at 744nm and 840nm.The linear range is 0～7.0%(V/V)or 0～8.0%(V/V)for the determination of water in methanol,ethanol,n-propyl alcohol,2-propanol.The results for ethanol were in agreement with standard results. The recoveries of water in n-propyl alcohol and 2-propanol were 96.6%～101% and 98%～102%,respectively.This is a simple,sensitive and reproducible method for determining water in organic solvents.

关 键 词：有机溶剂 微量分析 水 7 7 8 8-四氰基对二次甲基苯醌 光度法 

分 类 号：O661.1[理学—分析化学] O657.3[理学—化学]