ASTM-D2597 2010

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D2597-10 Standard Test Method for Analysis of Demethanized Hydrocarbon Liquid Mixtures Containing Nitrogen and Carbon Dioxide by Gas Chromatography

Published By	Publication Date	Number of Pages
ASTM	2010	11

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Description

1.1 This test method covers the analysis of demethanized liquid hydrocarbon streams containing nitrogen/air and carbon dioxide, and purity products, such as an ethane/propane mix that fall within the compositional ranges listed in Table 1. This test method is limited to mixtures containing less than 5 mol % of heptanes and heavier fractions.

1.2 The heptanes and heavier fractions, when present in the sample, are analyzed by either ( 1 ) reverse flow of carrier gas after n -hexane and peak grouping or ( 2 ) precut column to elute heptanes and heavier first as a single peak. For purity mixes without heptanes and heavier, no reverse of carrier flow is required. ( Caution In the case of samples with a relatively large C ₆₊ or C ₇₊ fraction and where precise results are important, it is desirable to determine the molecular weight (or other pertinent physical properties) of these fractions. Since this test method makes no provision for determining physical properties, the physical properties needed can be determined by an extended analysis or agreed to by the contracting parties.)

1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

Note 1Annex A2 states values in manometric units, which are to be regarded as the standard in that section. Approximate SI units (from conversion) are given in parentheses.

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.

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PDF Pages	PDF Title
1	Scope Referenced Documents Summary of Test Method
2	Significance and Use Apparatus TABLE 1 FIG. 1
3	Calibration FIG. 2 FIG. 3
4	Procedure FIG. 4 FIG. 5
5	TABLE 2
6	Sample Analysis Calculation FIG. 6 FIG. 7
7	Report Precision and Bias Keywords TABLE 3
8	A1. FIDELITY OF SELECTED REFERENCE STANDARDS A1.1 A1.2 A1.3 FIG. A1.1 TABLE A1.1
9	A2. DETERMINATION OF RESPONSE FACTORS A2.1 Linearity Check A2.2 Calibration Procedure FIG. A2.1
10	A3. HAZARD STATEMENTS A3.1 Flammable Liquefied Gases A3.2 Compressed Gases (Helium, Nitrogen) FIG. A2.2

Additional information

Standard Title	D2597-10 Standard Test Method for Analysis of Demethanized Hydrocarbon Liquid Mixtures Containing Nitrogen and Carbon Dioxide by Gas Chromatography
Published Code	ASTM
Publication Date	2010
Pages Count	11

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ASTM-D2597 2010

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