ASTM D7977-14 PDF

Scope: 4.1 This test method can be used for determining polymer concentrations in AMS monomer.

4.2 This test method will not detect dimers and trimers.

4.3 This test method can be used for plant control and for specification analysis.

1.1 This test method covers the determination of the polymer content of AMS (α-Methystyrene). Dimers and trimers are not measured by these test methods.

1.2 This test method has been found applicable to determining the polymer content of AMS in concentrations up to 15 mg/kg. Samples containing more than 15 mg/kg of polymer must be suitably diluted before measurement.

1.3 In determining the conformance of the test results using this method to applicable specifications, results shall be rounded off in accordance with the rounding-off method of Practice E29.

1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5 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. For specific hazard statements, see Section 8.

ASTM D7977-14 Referenced Document

ASTM D3437 Standard Practice for Sampling and Handling Liquid Cyclic Products
ASTM D6367 Standard Specification for AMS (alpha-Methylstyrene)
ASTM D6809 Standard Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons and Related Materials
ASTM E29 Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

2023 ASTM D7977-23 Standard Test Methods for Polymer Content of AMS (α-Methylstyrene)
2019 ASTM D7977-19 Standard Test Methods for Polymer Content of AMS (α-Methylstyrene)
2014 ASTM D7977-14 Standard Test Methods for Polymer Content of AMS (α-Methylstyrene)