ASTM D7191-10
Standard Test Method for Determination of Moisture in Plastics by Relative Humidity Sensor

Standard No.

ASTM D7191-10

Release Date

2010

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D7191-18

Latest

ASTM D7191-18

Scope

This test method is intended for use as a control, acceptance, and assessment test.

Moisture can seriously affect the processability of plastics. It is possible that high moisture content will cause surface imperfections (that is, splay or bubbling) or degradation by hydrolysis. Low moisture (with high temperature) has been known to cause solid phase polymerization.

The physical properties of some plastics are greatly affected by the moisture content.

1.1 This test method covers the quantitative determination of water down to 20 ppm in plastics using a relative humidity sensor.

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

1.3 Specimens tested in this test method can reach or exceed 250°C, use caution when handling them after testing has completed.

1.4 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.

Note 18212;There is no known ISO equivalent to this standard.

ASTM D7191-10 Referenced Document

• ASTM D1193 Standard Specification for Reagent Water
• ASTM D1600 Standard Terminology for Abbreviated Terms Relating to Plastics
• ASTM D6869 Standard Test Method for Coulometric and Volumetric Determination of Moisture in Plastics Using the Karl Fischer Reaction (the Reaction of Iodine with Water)
• ASTM D883 Standard Terminology Relating to Plastics
• ASTM E177 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
• ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

ASTM D7191-10 history

• 2018 ASTM D7191-18 Standard Test Method for Determination of Moisture in Plastics by Relative Humidity Sensor
• 2010 ASTM D7191-10 Standard Test Method for Determination of Moisture in Plastics by Relative Humidity Sensor
• 2005 ASTM D7191-05 Standard Test Method for Determination of Moisture in Plastics by Relative Humidity Sensor