ASTM D 4928 Standard Test Methods for Water in Crude Oils by Coulometric Karl Fischer Titration
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ASTM D 4928 Document Information:
Title
Standard Test Methods for Water in Crude Oils by Coulometric Karl Fischer Titration
ASTM International
Publication Date:
Sep 10, 2000
Scope:
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 µg/g (ppm), the
interference from these compounds
is insignificant (see Section 5).
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.
This test method is intended for use with standard commercially
available coulometric Karl Fischer
reagent.
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.
Keywords:
- coulometric
- crude oils
- homogenization
- Karl Fischer
- shear mixer
- titration
- water
- water in crude oils
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