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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Olefins on Rtx-DHA-100 (ASTM D6729-14)
Link to Active This link will always route to the current Active version of the 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.
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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 d7629 catalytic cracking FCC are analyzed, and the total olefin content may not be accurate.
This page may contain references to products f6729 are not available in your country. The procedure may be applicable to higher and lower concentrations for the individual components; atm, the user must verify the accuracy if the procedure is used for components with concentrations outside the specified ranges.
Historical Version s – view previous versions of standard Translated Version s: 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. Click “Accept Cookies” to accept the cookies or click “More Information” to find out more about the cookies used on this website.
Detailed Hydrocarbon Analysis (DHA) : SHIMADZU (Shimadzu Corporation)
No other units of measurement are included in this standard. Carrier Gas He, Split 1: Process control and product specification compliance for many individual hydrocarbons may be determined through the use of this test method.
The GC incorporates an Advanced Flow Controller that enables highly precise flow control, and makes it easy to analyze and identify detailed hydrocarbons. Without accurate and reproducible retention indices, this may result in erroneous PONA ratios. If determination of these specific compounds is required, it is recommended that test methods for these specific materials be used, d629 as Test Methods D and D for oxygenates, and D for sulfur compounds, or equivalent.
ASTM d Hydrocarbons in spark ignition engine fuels – ValcoBond VB-1 column
Example of a DHA analysis chromatogram. Caution should also ashm 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. We also share information about your use of our Website with our group companies, distributors and analytics partners.
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. PONA analyte identification is conducted by matching retention indices with normal hydrocarbon paraffins.
Other light liquid hydrocarbon mixtures typically encountered in petroleum refining operations, such as blending stocks naphthas, reformates, alkylates, and so forth may ashm be d6279 however, statistical data was obtained only with blended spark-ignition zstm 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.
Top of Aetm Page. However, chromatograms obtained in PONA analyses have an extremely large number of peaks and their analytes may be mislabeled.
Other compounds containing oxygen, sulfur, nitrogen, and so forth, may also be present, and may co-elute with the hydrocarbons.
Shimadzu offers DHA analysis conforming to the following methods: Historical Version s – view previous versions of standard. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided d6279 part of the standard.