ASTM E203 PDF

A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense. Scope 1.

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Want this as a site license? Changes from the previous issue A redline edition is available for this document, with all changes visible. Ask Document Center Inc. Scope 1. This test method is designed for use with automatic titration systems capable of determining the KF titration end point potentiometrically; however, a manual titration method for determining the end point visually is included as Appendix X1. Samples that are gaseous at room temperature are not covered see Appendix X4. This test method covers the use of both pyridine and pyridine-free KF reagents for determining water by the volumetric titration.

Determination of water using KF coulometric titration is not discussed. By proper choice of the sample size, KF reagent concentration and apparatus, this test method is suitable for measurement of water over a wide concentration range, that is, parts per million to pure water.

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 warnings are given in 3. Significance and Use 4. Further discussion of interferences is included in Section 5 and Appendix X2.

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When using pyridine-free reagents, commercially available buffer solutions can be added to the sample prior to titration. With formic acid, it may be necessary to use methanol-free solvents and titrants 1. Formaldehyde polymers contain water as methylol groups. This combined water is not titrated. Addition of an excess of NaOCH3 in methanol permits release and titration of this combined water, after approximate neutralization of excess base with acetic acid see Note 9.

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ASTM E203-Volumetric Determination of Water.pdf

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ASTM E203 - 16

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