1. 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 amperometrically; 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 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.

1.3 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.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D789 Test Methods for Determination of Solution Viscosities of Polyamide (PA)

D803 Test Methods for Testing Tall Oil

D890 Test Method for Water in Liquid Naval Stores

D1123 Test Methods for Water in Engine Coolant Concentrate by the Karl Fischer Reagent Method

D1152 Specification for Methanol (Methyl Alcohol)

D1193 Specification for Reagent Water

D1348 Test Methods for Moisture in Cellulose

D1364 Test Method for Water in Volatile Solvents (Karl Fischer Reagent Titration Method)

D1533 Test Method for Water in Insulating Liquids by Coulometric Karl Fischer Titration

D1568 Test Methods for Sampling and Chemical Analysis of Alkylbenzene Sulfonates

D1631 Test Method for Water in Phenol and Related Materials by the Iodine Reagent Method

D2072 Test Method for Water in Fatty Nitrogen Compounds

D2575 Methods of Testing Polymerized Fatty Acids

D3277 Test Methods for Moisture Content of Oil-Impregnated Cellulosic Insulation

D3401 Test Methods for Water in Halogenated Organic Solvents and Their Admixtures

D4017 Test Method for Water in Paints and Paint Materials by Karl Fischer Method

D4377 Test Method for Water in Crude Oils by Potentiometric Karl Fischer Titration

D4672 Test Method for Polyurethane Raw Materials: Determination of Water Content of Polyols

D4928 Test Method for Water in Crude Oils by Coulometric Karl Fischer Titration

D5460 Test Method for Rubber Compounding Materials--Water in Rubber Additives

D5530 Test Method for Total Moisture of Hazardous Waste Fuel by Karl Fischer Titrimetry

D6304 Test Method for Determination of Water in Petroleum Products, Lubricating Oils, and Additives by Coulometric Karl Fischer Titration

E180 Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals

E1064 Test Method for Water in Organic Liquids by Coulometric Karl Fischer Titration

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/E0203-96

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