ASTM D5135 – Standard Test Method for Analysis of Styrene by Capillary Gas Chromatography
Description:
Significance and Use
5.1 This test method is designed to obtain styrene purity on the basis of impurities normally present in styrene and may be used for final product inspections and process control.
5.2 This test method will detect the impurities shown in Table 1, non-aromatic hydrocarbons containing ten carbons or less, and others where specific impurity standards are available. Absolute purity cannot be determined if unknown impurities are present.
Scope
1.1 This test method covers the determination of the impurities typically found in styrene and uses those values to determine the purity of styrene by difference by gas chromatography. Typical impurities in commercial styrene are found in Table 1.
1.2 This test method is applicable to impurity concentrations up to 1 %.
1.2.1 The limit of detection is 0.0003 mass % and the limit of quantitation is 0.0010 mass %.
1.2.2 LOD and LOQ were calculated using data from ILS results for n-propylbenzene in Table 3.
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.
ASTM D5134