Astm D 3988 – 85 (Reapproved 1999) pdf free download

Standard Test Method for
Vanadium in Paint Driers by EDTA Method1

This standard is issued under the fixed designation D 3988; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval

1. Scope

1.1 This test method covers the titrimetric determination of
vanadium in liquid vanadium driers and utilizes the disodium
salt of ethylenediaminetetraacetic acid dihydrate (EDTA).

1.2 This test method is limited to the determination of the
vanadium content of a liquid vanadium drier that does not
contain other drier elements. This test method is not applicable
to drier blends.

1.3 All cations that can be titrated with EDTA in alkaline
media interfere and must not be present in the sample.

1.4 This test method has been tested for concentrations of 3
and 4 % vanadium, but there is no reason to believe that it is
not suitable for higher or lower vanadium concentrations
provided specimen size is adjusted proportionately.

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.

2. Referenced Documents

2.1 ASTM Standards:
D 600 Specification for Liquid Paint Driers2
D 1193 Specification for Reagent Water3
E 180 Practice for Determining the Precision of ASTM
Methods for Analysis and Testing of Industrial Chemicals4
E 300 Practice for Sampling Industrial Chemicals4

3. Summary of Test Method

3.1 The amount of vanadium drier used in oxidizing-type
coatings significantly affect their drying properties. The vanadium drier is acidified and heated to make the vanadium
available for chelation with EDTA. It is then chelated, and the pH
adjusted, and the excess titrated with zinc chloride solution,
using Eriochrome Black T as the indicator.

4. Significance and Use

4.1 This test method may be used to confirm the stated

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