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Standard Test Method for Analysis of Toluene by Capillary Column Gas Chromatography (Withdrawn 2018)
Automaticky preložený názov:
Štandardná skúšobná metóda pre analýzu toluénu pomocou kapilárnej plynovej chromatografie
NORMA vydaná dňa 15.3.2012
Označenie normy: ASTM D6526-12
Poznámka: NEPLATNÁ
Dátum vydania normy: 15.3.2012
Kód tovaru: NS-35496
Počet strán: 5
Približná hmotnosť: 15 g (0.03 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
benzene, gas chromatography, impurities, toluene purity, 1,4-dioxane, Capillary gas chromatography, Chemical analysis--paints/related coatings/materials, 1,4-Dioxane, Gas chromatography (GC)--paints/related coatings/materials, Impurities--organic compounds, Toluene, Toluene purity, ICS Number Code 71.040.50 (Physicochemical methods of analysis), 71.080.15 (Aromatic hydrocarbons)
Significance and Use | ||||||||||||||||||
This test method is suitable for determining the concentrations of known impurities in refined toluene and for use as an integral quality control tool where toluene is produced or used in manufacturing. Toluene purity is reported, but a chromatographic analysis cannot determine absolute purity if unknown or undetected components are present in the sample. |
||||||||||||||||||
1. Scope | ||||||||||||||||||
1.1 This test method covers the determination of hydrocarbon impurities typically found in, and the purity of, samples containing 98 wt % and greater toluene. This test method is applicable to impurity concentrations in the range of 0.0005 to 1.6 wt %. 1.2 Monocyclic aromatic hydrocarbons containing 6 through 8 carbon atoms, cumene, 1,4–dioxane, and nonaromatic aliphatic hydrocarbons containing up to 12 carbon atoms can be detected by this test method. The nonaromatic compounds are determined as a composite. 1.3 The following applies to all specified limits in this test method: for purposes of determining conformance with this test method, an observed value or a calculated value shall be rounded off “to the nearest unit” in the last right-hand digit used in expressing the specification limit, 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 9. |
||||||||||||||||||
2. Referenced Documents | ||||||||||||||||||
|
Posledná aktualizácia: 2024-11-01 (Počet položiek: 2 208 817)
© Copyright 2024 NORMSERVIS s.r.o.