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ASTM D6526-03e1
Standard Test Method for Analysis of Toluene by Capillary Column Gas Chromatography
6 стр.
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Разработчик:
Зарубежные/ASTM
ICS:
71.080.15 Aromatic hydrocarbons / Ароматические углеводороды71.040.50 Physicochemical. Including spectrophotometric and chromatographic analysis / Физико-химические методы анализа. Включая спектрофотометрический и хроматографический анализы
Сборник (ASTM):
06.04 Paint—Solvents; Aromatic; Industrial, Specialty and Related Chemicals / Красители – Растворители; Ароматические углеводороды
Тематика:
Chemicals: Paint & Coatings
Описание
Значение и использование

This test method is suitable for determining the concentrations of known impurities in refined toluene and for use as an integral quality control tool where toluene is produced or used in manufacturing.

Toluene purity is reported, but a chromatographic analysis cannot determine absolute purity if unknown or undetected components are present in the sample.

Область применения

1.1 This test method covers the determination of hydrocarbon impurities typically found in, and the purity of, samples containing 98 wt % and greater toluene. This test method is applicable to impurity concentrations in the range of 0.0005 to 1.6 wt %.

1.2 Monocyclic aromatic hydrocarbons containing 6 through 8 carbon atoms, cumene, 1,4-dioxane, and nonaromatic aliphatic hydrocarbons containing up to 12 carbon atoms can be detected by this test method. The nonaromatic compounds are determined as a composite.

1.3 The following applies to all specified limits in this test method: for purposes of determining conformance with 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 E 29.

1.4 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. For specific hazard statements, see Section 9.

Ключевые слова:
benzene; gas chromatography; impurities; 1,4-dioxane; toluene purity