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ASTM D3401

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

Description:

Significance and Use

4.1 High water concentrations can have a detrimental effect on many uses of halogenated solvents.

4.1.1 Water can cause corrosion and spotting when solvents are used for metal cleaning.

4.1.2 Water can reduce the shelf life of aerosol formulations.

4.1.3 Water can inhibit desired reactions when solvents are used in formulations.

Scope

1.1 These test methods describe the use of the Karl Fischer (KF) titration for determination of water in halogenated organic solvents and mixtures thereof. Water concentrations from 2 ppm to 1000 ppm can be determined in these solvents. Two test methods are covered as follows:

1.1.1 Test Method A, Water Determination Using a Coulometric KF Titrator—The coulometric test method is known for its high degree of sensitivity (typically <10 μg H2O) and should be the test method of choice if water concentrations are typically below 50 ppm or if only small amounts of sample are available for water determinations. This test method requires the use of equipment specifically designed for coulometric titrations.

1.1.2 Test Method B, Water Determination Using a Volumetric KF Titrator—The volumetric test method is a more traditional approach to KF water determinations. Although titrators are specifically designed for KF volumetric determinations, many automatic titrators on the market can be adapted to perform KF titrations.

1.2 Either of these test methods can be used to determine typical water concentrations (15 ppm to 500 ppm) found in halogenated solvents.

1.3 These test methods recommend the use of commercially available Karl Fischer titrators and reagents.

Related Test Methods

ASTM D4950

ASTM D495

ASTM D4951

ASTM D4950

ASTM D495

ASTM D4948

ASTM D4946

ASTM D4943

ASTM D4940

ASTM D4935

ASTM D4929

ASTM D4928

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