ASTM-E203 2008

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E203-08 Standard Test Method for Water Using Volumetric Karl Fischer Titration

Published By	Publication Date	Number of Pages
ASTM	2008	10

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Categories: 71.040.40 - Chemical analysis, ASTM

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Description

ASTM E203-08

Historical Standard: Standard Test Method for Water Using Volumetric Karl Fischer Titration

ASTM E203

Scope

1.1 This test method is intended as a general guide for the application of the volumetric Karl Fischer (KF) titration for determining free water and water of hydration in most solid or liquid organic and inorganic compounds. 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.

1.2 The values stated in SI units are to be regarded as standard.

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 and health practices and determine the applicability of regulatory limitations prior to use. Specific warnings are given in 3.1 and 7.3.3.

1.4 Review the current Material Safety Data Sheets (MSDS) for detailed information concerning toxicity, first aid procedures, and safety precautions for chemicals used in this test procedure.

Keywords

free water; Karl Fischer reagent; pyridine-free; volumetric; water; water of hydration; Karl Fischer reagent method–water content; Liquids–laboratory applications; Organic compounds–water; Solid phase materials; Water content–chemicals

ICS Code

ICS Number Code 71.040.40 (Chemical analysis)

DOI: 10.1520/E0203-08

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents
2	Summary of Test Method Significance and Use Interferences
3	Apparatus Reagents
4	Drying of Solvents End Point Detection Procedure for Soluble Materials, Either Liquid or Solid TABLE 1
5	Standardization of Karl Fischer Reagent Procedure for Insoluble Solids Report Precision and Bias
6	Keywords X1. SUGGESTED APPARATUS FOR KARL FISCHER METHOD X1.1 X1.2
7	X1.3 X1.4 X1.5 X1.6 X1.7 X1.8 X1.9 X1.10 X1.11 FIG. X1.1
8	X2. INTERFERING COMPOUNDS THAT REACT STOICHIOMETRICALLY WITH KF REAGENT, THEREBY ENABLING FREE WATER TO BE CALCULATED AFTER APPLYING CORRECTION X2.1 X2.2 TABLE X2.1
9	X3. OTHER ASTM KARL FISCHER REAGENT WATER METHODS X4. DETERMINATION OF WATER IN GASES X4.1 X4.2 X4.3 REFERENCES

Additional information

Standard Title	E203-08 Standard Test Method for Water Using Volumetric Karl Fischer Titration
Published Code	ASTM
Publication Date	2008
Pages Count	10
ICS Codes	71.040.40 - Chemical analysis