Pyridine-free karl fischer reagent useful in determining water

Details Pyridine-free karl fischer reagent useful in determining water Pyridine-free karl fischer reagent useful in determining water

G - Physics

01

N

6/218, 150/7

G01N 31/16 (2006.01) C09K 3/00 (2006.01) G01N 27/42 (2006.01) G01N 33/18 (2006.01)

Patent

CA 1185508

ABSTRACT OF THE DISCLOSURE An essentially pyridine-free Karl Fischer reagent useful in the determination of water is provided herein. It comprises a dissolving agent containing sulfur dioxide and a pyridine substitute in a Karl Fischer solvent, and a titrating agent containing iodine in a Karl Fischer solvent. The pyridine substitute is an alkali metal benzoate, an alkaline earth metal benzoate or ammonia, and the reagent is essentially free of pyridine. These pyridine substitutes have a very good solubility in the reagent solution, react with alcohols virtually without the formation of esters, and have a very high stability in storage.

392546

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