ASTM-D7675 2011

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D7675-11 Standard Test Method for Test Method for the Determination of Total Hydrocarbons in Hydrogen by FID Based Total Hydrocarbon (THC) Analyzer

Published By	Publication Date	Number of Pages
ASTM	2011	5

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Category: ASTM

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Description

ASTM D7675-11

Historical Standard: Standard Test Method for Test Method for the Determination of Total Hydrocarbons in Hydrogen by FID Based Total Hydrocarbon (THC) Analyzer

ASTM D7675

Scope

1.1 This test method describes a procedure for total hydrocarbons (THC) measurement in hydrogen intended as a fuel for fuel cells on a C1 Basis. Total Hydrocarbons on a C1 basis is an analytical technique where total carbon is determined and all of the hydrocarbons are assumed to have the same response as Methane. Sensitivity from 0.1 part per million (ppm, µmole/mole) up to 1000 parts per million (ppm, µmole/mole) concentration are achievable. Higher concentrations can be analyzed using appropriate dilution techniques. This test method can be applied to other gaseous samples requiring analysis of trace constituents provided an assessment of potential interferences has been accomplished.

1.2 This test method is a FID based hydrocarbon analysis method without the use of separation columns, therefore, this method does not provide speciation of individual hydrocarbons. Varieties of instruments are manufactured and can be used for this method.

1.2.1 This method provides a measure of total hydrocarbons “as methane”, because all hydrocarbon species are quantified the same as methane response, which is the sole species used for calibration. Therefore C2 and above hydrocarbons are quantified relative to the number of carbon atoms present in the molecule.

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

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.

Keywords

flame ionization detector (FID); PEM fuel cells; total carbon analysis (TCA); total hydrocarbon (THC); ultra high purity (UHP) hydrogen; zero grade air

ICS Code

ICS Number Code 27.075 (Hydrogen technologies)

DOI: 10.1520/D7675-11

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology
2	Summary of Test Method Significance and Use Apparatus Reagents and Materials
3	Preparation of Apparatus Calibration and Standardization Procedure FIG. 1
4	Calculation Report Precision and Bias Keywords

Additional information

Standard Title	D7675-11 Standard Test Method for Test Method for the Determination of Total Hydrocarbons in Hydrogen by FID Based Total Hydrocarbon (THC) Analyzer
Published Code	ASTM
Publication Date	2011
Pages Count	5