Potrebujeme váš súhlas na využitie jednotlivých dát, aby sa vám okrem iného mohli ukazovať informácie týkajúce sa vašich záujmov. Súhlas udelíte kliknutím na tlačidlo „OK“.
Standard Test Method for Analysis of Phenol by Capillary Gas Chromatography
Automaticky preložený názov:
Štandardná skúšobná metóda pre analýzu fenolu kapilárnej plynovej chromatografie
NORMA vydaná dňa 1.6.2012
Označenie normy: ASTM D6142-12
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.6.2012
Kód tovaru: NS-33982
Počet strán: 5
Približná hmotnosť: 15 g (0.03 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
2-methylbenzofuran, acetone, acetophenone, &alpha,-methylstyrene, cumene, gas chromatography, hydroxyacetone, mesityl oxide, phenol, sec-butyl alcohol, ICS Number Code 71.040.50 (Physicochemical methods of analysis)
Significance and Use | ||||||||||||||||
5.1 This test method is suitable for setting specifications on phenol and for use as an internal quality control tool where phenol is produced or is used in a manufacturing process. It may also be used in development or research work involving phenol. It is generally applied to determining those commonly occurring impurities such as mesityl oxide, cumene, hydroxyacetone, acetone, alpha-methylstyrene, 2-methylbenzofuran, and acetophenone. 5.2 Purity is commonly reported by subtracting the determined expected impurities from 100.00. However, a gas chromatographic analysis cannot determine absolute purity if water is present or unknown components are contained within the material being examined. |
||||||||||||||||
1. Scope | ||||||||||||||||
1.1 This test method covers the determination of known impurities in phenol by gas chromatography (GC). It is generally meant for the analysis of phenol of 99.9 % or greater purity. 1.2 This test method has been found applicable over impurity concentrations of 15 to 70 mg/kg. Users of this method believe it is linear over a wider range. 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.
Standard Practice for Sampling and
Handling Phenol, Cresols, and Cresylic Acid Standard Practice for Installing Fused
Silica Open Tubular Capillary Columns in Gas Chromatographs Standard Practice for Conducting an
Interlaboratory Study to Determine the Precision of a Test
Method Standard Practice for Gas Chromatography
Terms and Relationships (Includes all amendments and changes
4/28/2021). Standard Practice for Using Significant
Digits in Test Data to Determine Conformance with
Specifications Standard Guide for Quality Control and
Quality Assurance Procedures for Aromatic Hydrocarbons and Related
Materials (Includes all amendments and changes 10/20/2020). Standard Terminology of Aromatic
Hydrocarbons and Related Chemicals Standard Practice for Preparation of
Liquid Blends for Use as Analytical Standards |
Historická
15.8.2008
Historická
1.4.2009
Historická
1.5.2008
Historická
1.4.2014
Historická
15.4.2009
Historická
1.2.2013
Chcete mať istotu, že používate len platné technické normy?
Ponúkame Vám riešenie, ktoré Vám zaistí mesačný prehľad o aktuálnosti noriem, ktoré používate.
Chcete vedieť viac informácií ? Pozrite sa na túto stránku.
Posledná aktualizácia: 2024-11-22 (Počet položiek: 2 206 568)
© Copyright 2024 NORMSERVIS s.r.o.