ASTM-D4928 2011(Redline)

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D4928-11 Standard Test Method for Water in Crude Oils by Coulometric Karl Fischer Titration (Redline)

Published By	Publication Date	Number of Pages
ASTM	2011	6

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Category: ASTM

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Description

Significance and Use

A knowledge of the water content of crude oil is important in the refining, purchase, sale, or transfer of crude oils.

1. Scope

1.1 This test method covers the determination of water in the range from 0.02 to 5 mass or volume % in crude oils. Mercaptan (RSH) and sulfide (S ⁻ or H ₂ S) as sulfur are known to interfere with this test method, but at levels of less than 500 μ g/g (ppm), the interference from these compounds is insignificant (see Section 5).

1.2 This test method can be used to determine water in the 0.005 to 0.02 mass % range, but the effects of the mercaptan and sulfide interference at these levels has not been determined.

1.3 This test method is intended for use with standard commercially available coulometric Karl Fischer reagent.

1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 7.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D1193 Specification for Reagent Water D4057 Practice for Manual Sampling of Pet

Additional information

Standard Title	D4928-11 Standard Test Method for Water in Crude Oils by Coulometric Karl Fischer Titration (Redline)
Published Code	ASTM
Publication Date	2011
Pages Count	6

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ASTM-D4928 2011(Redline)

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