ASTM D – Detailed Hydrocarbon Analysis (DHA) ETBE, TAME; Concentration range: to approximately 30 mass %; Methods met: ASTM D Detailed Hydrocarbon Analysis of Spark Ignition Engine Fuels by GC using ASTM D Coen Duvekot. Varian, Inc. Application Note SI 1 of 3. Restek Searchable Chromatogram Library. delim. Olefins on Rtx-DHA ( ASTM D). This chromatogram may contain analytes that are synonyms of .
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PAC-Lab Instruments-ASTM D
Other light liquid hydrocarbon mixtures typically encountered in petroleum refining operations, such as blending stocks naphthas, reformates, alkylates, and so forth may also be analyzed; however, statistical data was obtained only asgm blended spark-ignition engine fuels.
Although benzene, toluene, and several oxygenates are determined, when doubtful as to the analytical results of these components, confirmatory analyses can be obtained by using specific test methods.
Example of a DHA analysis chromatogram. Other compounds containing oxygen, sulfur, nitrogen, and so forth, may also be present, and may co-elute with the hydrocarbons.
If determination of these specific compounds is required, it is recommended that test methods for these specific materials be used, such as Test Methods D and D for oxygenates, and D for sulfur compounds, or equivalent.
The GC incorporates an Advanced Flow Controller that enables highly precise flow control, and makes it easy to analyze and identify detailed hydrocarbons.
However, chromatograms obtained in PONA analyses have an extremely large number of peaks and their analytes may be mislabeled. Top of This Page. Shimadzu offers DHA analysis conforming to the following methods: Historical Version s – view previous versions of standard.
We also share information about your use of our Website with our group companies, distributors and analytics partners. Process control and product specification compliance for many individual hydrocarbons may be determined through the use of this test method.
This page may contain references to products that are not available in your country. Caution should also be exercised when analyzing olefin-free samples using this test method as some of the paraffins may be reported as olefins since analysis is based purely on retention times of the eluting components.
Historical Version s – view previous versions of standard Translated Version s: Samples containing significant amounts of olefinic or naphthenic for example, virgin naphthas d67229, or both, constituents above n -octane may reflect significant errors in PONA type groupings. Link to Active This link will always route to the current Active version 6d729 the standard.
Detailed Hydrocarbon Analysis (DHA) : SHIMADZU (Shimadzu Corporation)
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the d66729 of regulatory limitations prior to use. More Information Accept Cookies.
No other units of measurement are included in this standard. However, some interfering coelution with the olefins above C 7 is possible, particularly if blending components or their higher boiling cuts such as those derived from fluid catalytic cracking FCC are analyzed, and the total olefin content may not be accurate.
Carrier Gas He, Split 1: Click “Accept Cookies” to accept the cookies or click “More Information” to find out more about the cookies used on this website. If this test method is utilized to estimate bulk hydrocarbon group-type composition PONA the user of such data should be cautioned that some error will be encountered due to co-elution and a lack of identification of all components present.
The procedure may be applicable to higher and lower concentrations for the individual components; however, the user must verify the accuracy if the procedure is used for components with concentrations outside the specified ranges.
However, the cooperative study data provided sufficient statistical data for MTBE only. X6729 accurate and reproducible retention indices, this may result in erroneous PONA ratios.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.