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Standard Test Method for Analysis of Isopropylbenzene (Cumene) by Gas Chromatography (External Standard)
Automaticky preložený názov:
Štandardná skúšobná metóda pre analýzu isopropylbenzen (cumene) plynovou chromatografiou (External Standard)
NORMA vydaná dňa 1.6.2013
Označenie normy: ASTM D7057-13
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.6.2013
Kód tovaru: NS-37442
Počet strán: 5
Približná hmotnosť: 15 g (0.03 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
alpha-methylstyrene, analysis by gas chromatography, benzene, butylbenzene, cumene, cymene, diisopropylbenzene, ethylbenzene, isopropylbenzene, methyl cumene, nonaromatic hydrocarbons, propylbenzene, toluene, ICS Number Code 71.080.15 (Aromatic hydrocarbons)
Significance and Use | ||||||||||||||||
5.1 This test method is suitable for setting specifications on the materials referenced in 1.2 and for use as an internal quality control tool where isopropylbenzene is produced or is used in a manufacturing process. It may also be used in development or research work involving isopropylbenzene. 5.2 This test method is useful in determining the purity of isopropylbenzene with normal impurities present. If extremely high boiling or unusual impurities are present in the isopropylbenzene, this test method would not necessarily detect them and the purity calculation would be erroneous. 5.3 Cumene hydroperoxide, if present, will yield thermal decomposition products, primarily AP and DMPC as stated in 5.4 The nonaromatic hydrocarbons commonly present from the isopropylbenzene manufacturing process, particularly a non-zeolitic one, will interfere with the determination of xylenes (if present). |
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1. Scope | ||||||||||||||||
1.1 This test method covers the determination of the purity of isopropylbenzene (cumene) by gas chromatography. Calibration of the gas chromatography system is done by the external standard calibration technique. 1.2 This test method has been found applicable to the measurement of impurities such as nonaromatic hydrocarbons, benzene, toluene, ethylbenzene, phenol, cymenes, t-butylbenzene, n-butylbenzene, n-propylbenzene, alpha-methylstyrene, sec-butylbenzene, and diisopropylbenzenes, which are impurities that can be found in isopropylbenzene. The latter impurities can be analyzed over a range of 1 mg/kg to 500 mg/kg by this method (see Table 1). The limit of detection for these impurities is summarized in Table 1 as well. 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 Liquid Cyclic Products Standard Practice for Preparation of
Liquid Blends for Use as Analytical Standards Standard Practice for Installing Fused
Silica Open Tubular Capillary Columns in Gas Chromatographs Standard Terminology of Aromatic
Hydrocarbons and Related Chemicals Standard Practice for Gas Chromatography
Terms and Relationships (Includes all amendments and changes
4/28/2021). Standard Practice for Conducting an
Interlaboratory Study to Determine the Precision of a Test
Method 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). |
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