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ASTM E1064-12

Historical Revision

Standard Test Method for Water in Organic Liquids by Coulometric Karl Fischer Titration

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1.1 This test method covers the determination of water from 0 to 2.0 % mass in most liquid organic chemicals, with Karl Fischer reagent, using an automated coulometric titration procedure. Use of this test method is not applicable for liquefied gas products such as Liquid Petroleum Gas (LPG), Butane, Propane, Liquid Natural Gas (LNG), etc.

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

1.3 Review the current material safety data sheets (MSDS) for detailed information concerning toxicity, first-aid procedures, handling, and safety precautions.

1.4 This standard does not purport to address all of the safety problems, 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. Specific precautionary statements are given in Section 8.

The coulometric technique is especially suited for determining low concentrations of water in organic liquids that would yield small titers by the Karl Fischer volumetric procedure. The precision and accuracy of the coulometric technique decreases for concentrations of water much greater than 2.0 % because of the difficulty in measuring the small size of sample required. The test method assumes 100 % efficiency of coulombs in iodine production. Provision is made for verifying this efficiency. (See Table 1 and Note 6.)

TABLE 1 Sample Size Estimation

Expected Water ContentSample Size, mL
0 to 500 mg/kg5
500 to 1000 mg/kg2
1000 to 2000 mg/kg1
0.2 to 0.5 % mass0.5
0.5 to 2.0 % mass0.1

SDO ASTM: ASTM International
Document Number E1064
Publication Date April 1, 2012
Language en - English
Page Count 5
Revision Level 12
Supercedes
Committee E15.01
Publish Date Document Id Type View
Jan. 1, 2024 E1064-24 Revision
July 15, 2023 E1064-23 Revision
April 1, 2016 E1064-16 Revision
April 1, 2012 E1064-12 Revision
April 1, 2008 E1064-08 Revision
Oct. 1, 2005 E1064-05 Revision
Oct. 1, 2004 E1064-04A Revision
March 1, 2004 E1064-04 Revision
April 10, 2000 E1064-00 Revision