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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ASTM D6729 – 14
However, the cooperative study data provided sufficient statistical data for MTBE only. The GC incorporates an Advanced Flow Controller astk enables highly precise flow control, and makes it easy to analyze and identify detailed hydrocarbons. Historical Version s – view previous versions of standard.
Other compounds containing oxygen, sulfur, nitrogen, and so forth, may also be present, and may co-elute with the hydrocarbons.
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. 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.
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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. PONA analyte identification is conducted by matching retention indices with normal hydrocarbon paraffins.
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. Top of This Page. However, chromatograms obtained in PONA analyses have an extremely large number of peaks and their analytes may be mislabeled. We also share adtm about your use of our Website with our group companies, distributors and analytics partners.
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ASTM d Hydrocarbons in spark ignition engine fuels – ValcoBond VB-1 column
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. More Information Accept Cookies. Without accurate and reproducible retention indices, this may result in erroneous PONA ratios. No other s6729 of measurement are included in this standard.
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.
Shimadzu offers DHA analysis conforming to the following astmm Please contact us to check the availability of these products in your country. 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 d6279 lack of identification of all components present.
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 with blended spark-ignition engine fuels.
Historical Version s – view previous versions of standard Translated Version s: Process control and product specification compliance for many individual hydrocarbons may be determined through the use of this test method. Samples containing significant amounts of olefinic or naphthenic for example, virgin naphthasor both, constituents above n -octane may reflect significant errors in PONA type groupings. This page may contain references to qstm that are not available in your country. However, some interfering coelution with the olefins above C 7 is possible, particularly if blending components or their higher boiling cuts aatm as those derived from fluid catalytic cracking FCC are analyzed, and the total olefin content may not be accurate.
Example of a DHA analysis chromatogram.