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 Determination of Trace Thiophene in Refined Benzene by Gas Chromatography
Automaticky preložený názov:
Štandardná skúšobná metóda pre stanovenie stopových thiofenového rafinovanom Benzén plynovou chromatografiou
NORMA vydaná dňa 1.2.2014
Označenie normy: ASTM D4735-09(2014)
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.2.2014
Kód tovaru: NS-28362
Počet strán: 6
Približná hmotnosť: 18 g (0.04 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
benzene, capillary column, flame photometric detector, gas chromatography, pulsed flame photometric detector, split/splitless injector, thiophene, ICS Number Code 71.080.15 (Aromatic hydrocarbons)
Significance and Use | ||||||||||||||||||||||||||||||
4.1 This test method is suitable for setting specifications on benzene and for use as an internal quality control tool where benzene is either produced or used in a manufacturing process. 4.2 This test method was found applicable for determining thiophene in refined benzene conforming to the specifications described in Specification D2359 and may be applicable toward other grades of benzene if the user has taken the necessary precautions as described in the text. 4.3 This test method was developed as an alternative technique to Test Method D1685. |
||||||||||||||||||||||||||||||
1. Scope | ||||||||||||||||||||||||||||||
1.1 This test method covers the determination of thiophene in refined benzene in the range from 0.80 to 1.80 mg/kg for the Flame Photometric Detector (FPD), and from 0.14 to 2.61 mg/kg for the Pulsed Flame Photometric Detector (PFPD). For the PFPD, the minimum level of quantitation (LOQ) is 0.14 mg/kg and the minimum level of detection (LOD) is 0.04 mg/kg, as described in ASTM Research Report RR:D16-1038.2 The range of the test method may be extended by modifying the sample injection volume, split ratios, calibration range, or sample dilution with thiophene-free solvent. 1.2 This test method has been found applicable to benzene characteristic of the type described in Specifications D2359 and D4734 and may be applicable to other types or grades of benzene only after the user has demonstrated that the procedure can completely resolve thiophene from the other organic contaminants contained in the sample. 1.3 The following applies to all specified limits in this test method: for purposes of determining conformance to applicable specification using 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. 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 Using Significant
Digits in Test Data to Determine Conformance with
Specifications Standard Specification for Reagent
Water Standard Practice for Packed Column Gas
Chromatography Standard Practice for Gas Chromatography
Terms and Relationships (Includes all amendments and changes
4/28/2021). 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 Conducting an
Interlaboratory Study to Determine the Precision of a Test
Method Standard Practice for Using Flame
Photometric Detectors in Gas Chromatography (Includes all
amendments and changes 5/5/2021). Standard Practice for Installing Fused
Silica Open Tubular Capillary Columns in Gas Chromatographs Standard Specification for Refined
Benzene-535 Standard Practice for Sampling and
Handling Liquid Cyclic Products Standard Practice for Manual Sampling of
Petroleum and Petroleum Products Standard Practice for Automatic Sampling
of Petroleum and Petroleum Products (Includes all amendments and
changes 3/24/2023). Standard Practice for Preparation of
Liquid Blends for Use as Analytical Standards Standard Specification for Refined
Benzene-545 Standard Practice for Use of the Terms
Precision and Bias in ASTM Test Methods |
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.