Karl-Fischer reagent and procedure for the determination of water using it

US4550083A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Wolfgang Fischer · Meerbusch, DE
• Georg Seitz · Darmstadt, DE
• Karl-Dieter Krenn · Pfungstadt, DE

Key dates

• Filing date: Feb 14, 1983
• Grant date: Oct 29, 1985
• Expiry date: Feb 14, 2003

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N31/168
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A Karl Fischer reagent useful in the determination of water, comprises sulfur dioxide, iodine and a salt which is a system compatible addition compound of a nitrogen-containing organic base having a pK.sub.b <10 with a weak aromatic carboxylic acid having a pK.sub.a >2.