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Standard Test Method for Colorimetric Determination of p-tert-Butylcatechol In Styrene Monomer or AMS (α–Methylstyrene) by Spectrophotometry
Automaticky preložený názov:
Štandardná skúšobná metóda pre stanovenie kolorimetrickom p-terc-butylkatechol vo styrénu monoméru alebo AMS (a alpha; & ndash; metylstyrén) spektrofotometricky
NORMA vydaná dňa 1.6.2013
Označenie normy: ASTM D4590-13
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.6.2013
Kód tovaru: NS-27823
Počet strán: 3
Približná hmotnosť: 9 g (0.02 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
alpha-methylstyrene, AMS, para-tertiary butyl catechol, PTBC, styrene, inhibitor content, styrene, TBC content, TBC in styrene, ICS Number Code 71.080.60 (Alcohols. Ethers), 17.180.20 (Colours and measurement of light)
Significance and Use | ||||||||||||
5.1 This test method is suitable for determining the quantity of TBC inhibitor, both for the protection against polymerization while in transit and storage, and for internal quality control. |
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1. Scope | ||||||||||||
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. 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 and health practices and determine
the applicability of regulatory limitations prior to use.
Standard Guide for Quality Control and
Quality Assurance Procedures for Aromatic Hydrocarbons and Related
Materials (Includes all amendments and changes 10/20/2020). Standard Practice for Sampling and
Handling Liquid Cyclic Products Standard Specification for Reagent
Water Standard Practice for Using Significant
Digits in Test Data to Determine Conformance with
Specifications Standard Practice for Conducting an
Interlaboratory Study to Determine the Precision of a Test
Method Standard Terminology of Aromatic
Hydrocarbons and Related Chemicals |
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