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ASTM D4017-22

Current Revision

Standard Test Method for Water in Paints and Paint Materials by Karl Fischer Method

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1.1 This test method is applicable to all paints and paint materials, including resins, monomers, and solvents, with the exception of aldehydes and certain active metals, metal oxides, and metal hydroxides. While the evaluation was limited to pigmented products containing amounts of water in the 30 % to 70 % range, there is reason to believe that higher and lower concentrations can be determined by this test method.

1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific hazard statements are given in Section 7.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


4.1 Control of water content is often important in controlling the performance of paint and paint ingredients, and it is critical in controlling volatile organic compound (VOC) content.

4.2 Paint materials are often insoluble in common Karl Fischer solvents such as methanol. Pyridine has been found to be a nearly universal solvent for these materials; however, the Karl Fischer reaction is too slow in that solvent at room temperature. To speed it up, 1-ethylpiperidine is added at 5 % as a buffer, or “catalyst.”

4.3 For nonpyridine-based reagents, a number of different solvent systems are available to increase solubility and to minimize interferences from ketones and aldehydes.

SDO ASTM: ASTM International
Document Number D4017
Publication Date Dec. 1, 2022
Language en - English
Page Count 8
Revision Level 22
Supercedes
Committee D01.21
Publish Date Document Id Type View
Dec. 1, 2022 D4017-22 Revision
Jan. 10, 2002 D4017-96A Revision
Jan. 10, 2002 D4017-02 Revision
Not Available D4017-90 Revision
Not Available D4017-81R87E01 Revision
June 1, 2015 D4017-02R15 Reaffirmation
Feb. 1, 2008 D4017-02R08E01 Reaffirmation