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Description of ASTM-D2121 2007ASTM D2121 - 07Standard Test Methods for Polymer Content of Styrene Monomer and AMS (alpha-Methylstyrene)Active Standard ASTM D2121 | Developed by Subcommittee: D16.07 Book of Standards Volume: 06.04
Translated Standard: Russian ASTM D2121Significance and Use This test method can be used for determining polymer concentrations in styrene monomer or AMS. This test method will not detect dimers and trimers. This test method can be used for plant control and for specification analysis. 1. Scope 1.1 These test methods cover the determination of the polymer content of styrene monomer and AMS (-Methylstyrene). It should be noted, however, that dimers and trimers are not measured by these test methods. 1.2 Test Method A which is based on the use of a spectrophotometer or photometer, is intended for the quantitative determination of the polymer content of styrene monomer or 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 Test Method B is a rapid visual procedure that is intended for the approximate evaluation of polymer to a maximum concentration of 1.0 weight %. Samples having a polymer content of 1.0 weight % or greater should be suitably diluted prior to measurement. 1.4 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 E 29. 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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 Standards D2827 Specification for Styrene Monomer D3437 Practice for Sampling and Handling Liquid Cyclic Products D6809 Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons and Related Materials E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications Keywords methylstyrene; AMS; polymer; polymer content; styrene; styrene monomer; ICS Code ICS Number Code 71.080.15 (Aromatic hydrocarbons) DOI: 10.1520/D2121-07 ASTM International is a member of CrossRef. ASTM D2121The following editions for this book are also available...This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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