全新卡尔·费休电解液的研制

Research of New Karl Fischer Reagents Electrolysis Solution

本文对原卡尔·费休试剂进行了改进.以无毒无味的咪唑代替了原试剂中的吡啶,并以乙醇代替了试剂中的甲醇,制成了无毒无味的卡氏试剂.对由卡尔·费休试剂组成的电解液进行了改进,用碘化物代替碘,解决了试剂长期储存的问题.

The use of Kar Fischer method in the determination of water in organic materi- als is the most useful and accurate up to now.But in the Karl Fischer reagents,pyridine, methanol and other organic reagents are volatilizable,strong foul smell,toxicity and the store stablity is not good.So this paper make some improvement about it.A kind of amine which is no smell and little toxicity is selected to relpace pyridine.An organic solvent containing active hydrogen containing iodine ions being able to produce iodine at anode and solve in the electrolysis soution,is selected to take the place of iodine.The electrolysis solvent used in coulometry contains methanol and chloroform,we replaced them with ethanol and an organic solvent.