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API STD 521: Guide for Pressure-relieving and Depressuring Systems – Edition 6

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682

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ISO 760:1978

ISO 760:1978 Determination of water – Karl Fischer method (General method)

CDN $124.00

SKU: 91509cf40825 Category:

Description

Two methods of titration depending on whether the end point is detected visually or electrometrically are specified. The visual method is only applicable to colourless solutions but can be used when no electrometric apparatus is available. The electrometric method, whether by direct titration or back-titration, is the more accurate one and for this reason recommended. The principle of the test consists in reaction of any water present in a test portion with a solution of iodine and sulphur dioxide in a pyridine/methanol mixture (Karl Fischer reagent), previously standardized by titration with an exactly known mass of water.

Edition

1

Published Date

1978-12-01

Status

PUBLISHED

Pages

12

Language Detail Icon

English

Format Secure Icon

Secure PDF

Abstract

Two methods of titration depending on whether the end point is detected visually or electrometrically are specified. The visual method is only applicable to colourless solutions but can be used when no electrometric apparatus is available. The electrometric method, whether by direct titration or back-titration, is the more accurate one and for this reason recommended. The principle of the test consists in reaction of any water present in a test portion with a solution of iodine and sulphur dioxide in a pyridine/methanol mixture (Karl Fischer reagent), previously standardized by titration with an exactly known mass of water.

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