ASTM D4590 - 18 - Standard Test Method for Colorimetric Determination of p-tert-Butylcatechol In Styrene Monomer or AMS ($1X–Methylstyrene) by Spectrophotometry

ASTM D4590 - 18

Standard Test Method for Colorimetric Determination of p-tert-Butylcatechol In Styrene Monomer or AMS ($1X–Methylstyrene) by Spectrophotometry

Status : Current   Published : June 2018

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1.1 This test method is applicable to the determination of residual 4-tertiary-butylcatechol (TBC) in styrene monomer or AMS in the 1 to 100 mg/kg range. Any other compound producing color at 490 nm when contacted with aqueous sodium hydroxide solution will interfere. It may be compensated for by including it in the preparation of the standard solutions, if its identity and concentration in the sample are known.

1.2 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. The limit of detection is 0.2 mg/kg while the limit of quantitation is 0.8 mg/kg based on the ILS data in Table 1.

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

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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific statements on hazards, see Section 8.

1.5  This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.




Standard NumberASTM D4590 - 18
TitleStandard Test Method for Colorimetric Determination of p-tert-Butylcatechol In Styrene Monomer or AMS ($1X–Methylstyrene) by Spectrophotometry
StatusCurrent
Publication Date01 June 2018
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
Descriptors Alpha-methylstyrene, AMS, para-tertiary butyl catechol, PTBC, styrene, inhibitor content, styrene, TBC content, TBC in styrene
ICS71.080.60
PublisherASTM
FormatA4
DeliveryYes
Pages4
File Size75 KB
Price£36.00


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