ASTM D2268 Standard Test Method for Analysis of High-Purity n-Heptane and Isooctane by Capillary Gas Chromatography
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ASTM International
Standard Test Method for Analysis of High-Purity n-Heptane and Isooctane by Capillary Gas Chromatography
N D2268
Annotation
This test method covers and provides for the analysis of high-purity (greater than 99.5 % by volume) n -heptane and isooctane (2,2,4-trimethylpentane), which are used as primary reference standards in determining the octane number of a fuel. Individual compounds present in concentrations of less than 0.01 % can be detected. Columns specified by this test method may not allow separation of all impurities in reference fuels.
The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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.
Автоматический перевод:
Метод Стандартной пробы для Анализа Высокочистого n-гептана и Изооктана Капиллярной Газовой хроматографией
Этот метод тестирования покрывает и предусматривает анализ высокой чистоты (больше, чем 99.5% по объему) n - гептан и (2,2,4-trimethylpentane) изооктан, которые используются в качестве основных эталонов в определении октанового числа топлива. Отдельное настоящее составных объектов в концентрациях меньше чем 0.01% может быть обнаружено. Столбцы, указанные этим методом тестирования, не могут позволить разделение всех примесей в ссылочном топливе.



