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US4647542A Karl Fischer reagent and method for determining water by means of this reagent 失效
卡尔费休试剂和通过该试剂测定水的方法

Karl Fischer reagent and method for determining water by means of this
reagent
摘要:
A new Karl Fischer reagent contains as a pyridine substitute at least one compound of the general formula ##STR1## in which R.sup.1 and R.sup.2, which can be identical or different, =hydrogen or alkyl having 1-6 C atoms,R.sup.3 =alkyl having 1-6 C atoms,X=alkali metal ion or one equivalent of an alkaline earth metal ion,n=0 or a number from 1 to 4 andm=a number from 1 to 4.
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