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, alphamethylstyrene, 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 quantitation averages
3.8 mg/kg while the limit of detection for these impurities averages
1.1 mg/kg based on the data in Table 1.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 9.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ASTM D7057-23 Referenced Document
ASTM D3437 Standard Practice for Sampling and Handling Liquid Cyclic Products
ASTM D4307 Standard Practice for Preparation of Liquid Blends for Use as Analytical Standards
ASTM D4790 Standard Terminology of Aromatic Hydrocarbons and Related Chemicals
ASTM D6809 Standard Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons and Related Materials
ASTM E1510 Standard Practice for Installing Fused Silica Open Tubular Capillary Columns in Gas Chromatographs
ASTM E29 Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
ASTM E355 Standard Practice for Gas Chromatography Terms and Relationships*, 2024-04-22 Update
ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM D7057-23 history
2023ASTM D7057-23 Standard Test Method for Analysis of Isopropylbenzene (Cumene) by Gas Chromatography (External Standard)
2018ASTM D7057-18 Standard Test Method for Analysis of Isopropylbenzene (Cumene) by Gas Chromatography (External Standard)
2013ASTM D7057-13 Standard Test Method for Analysis of Isopropylbenzene (Cumene) by Gas Chromatography (External Standard)
2009ASTM D7057-09 Standard Test Method for Analysis of Isopropylbenzene (Cumene) by Gas Chromatography (External Standard)
2004ASTM D7057-04 Standard Test Method for Analysis of Isopropylbenzene (Cumene) by Gas Chromatography (External Standard)