Download or read book Quantitative Determination of Saturates Olefins and Aromatics in Hydrocarbon Distillate Products Using High Performance Liquid Chromatography with Dielectric Constant Detection HPLC DC written by Paul C. Hayes (Jr.) and published by . This book was released on 1986 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: A dielectric constant (DC) detector for high-performance liquid chromatography (HPLC) is the basis of a rapid and accurate hydrocarbon group-type analysis. This novel method can determine saturates, olefins, and total aromatics in hydrocarbon liquids with distillation endpoints of at least 400 deg C. The HPLC separation is achieved using a single, 5-micron olefin-selective column, a backflush valve, and Freon 123 as the mobile phase. The DC detector ensures a genuine uniformity of response (less than 2.5% RSD) for each hydrocarbon group type, independent of the carbon number distribution of the sample. Unity response factors are sufficient. On the basis of complex solutions of hydrocarbon standards, the accuracy for each structural group type is within one percent absolute. The chromatographic limit of detection is less than 0.5 volume percent (800 ng) for the last eluting hydrocarbon group, i.e., the backflushed olefins.
Download or read book Technical Reports Awareness Circular TRAC written by and published by . This book was released on 1987-07 with total page 766 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 1986 Abstracts written by and published by . This book was released on 1986 with total page 1064 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1987 with total page 1168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Performance Liquid Chromatographic Hydrocarbon Group type Analyses of Mid distillates Employing Fuel derived Fractions as Standards written by and published by . This book was released on 1983 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Application of High Performance Liquid Chromatography to the Analysis of Petroleum Materials Part 2 Quantitative Hydrocarbon Type Analysis written by George E. Fodor and published by . This book was released on 1975 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantitative hydrocarbon type analysis of middle distillate petroleum products, with emphasis on straight-run (olefin-free) diesel fuels has been accomplished by high performance liquid chromatography using silica gel absorbents.
Download or read book Group Type Hydrocarbon Standards for High Performance Liquid Chromatographic Analysis of Middistillate Fuels written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-20 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new high-performance liquid chromatographic (HPLC) method for group-type analysis of middistillate fuels is described. It uses a refractive index detector and standards that are prepared by reacting a portion of the fuel sample with sulfuric acid. A complete analysis of a middistillate fuel for saturates and aromatics (including the preparation of the standard) requires about 15 min if standards for several fuels are prepared simultaneously. From model fuel studies, the method was found to be accurate to within 0.4 vol% saturates or aromatics, and provides a precision of + or - 0.4 vol%. Olefin determinations require an additional 15 min of analysis time. However, this determination is needed only for those fuels displaying a significant olefin response at 200 nm (obtained routinely during the saturated/aromatics analysis procedure). The olefin determination uses the responses of the olefins and the corresponding saturates, as well as the average value of their refractive index sensitivity ratios (1.1). Studied indicated that, although the relative error in the olefins result could reach 10 percent by using this average sensitivity ratio, it was 5 percent for the fuels used in this study. Olefin concentrations as low as 0.1 vol% have been determined using this method. Otterson, D. A. and Seng, G. T. Glenn Research Center NASA-TP-2317, E-1931, NAS 1.60:2317
Download or read book Petroleum products Determination of aromatic hydrocarbon types in middle distillates High performance liquid chromatography method with refractive index detection written by and published by . This book was released on 2006 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Petroleum Products Determination of Aromatic Hydrocarbon Types in Middle Distillates High Performance Liquid Chromatography Method with Refractive Index Detection written by British Standards Institute Staff and published by . This book was released on 1916-02-29 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Petroleum, Petroleum technology, Petroleum products, Chemical analysis and testing, Determination of content, Aromatic hydrocarbons, Distillation methods of analysis, Liquid chromatography, Refractive index, Aromatic compounds, Diesel fuels, Contaminants
Download or read book Standard Test Method for Determination of Total Aromatics and Total Saturates in Lube Basestocks by High Performance Liquid Chromatography HPLC with Refractive Index Detection written by and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Methods of Test for Petroleum and Its Products Petroleum Products Determination of Aromatic Hydrocarbon in Middle Distillates High Performance Liquid Chromatography Method with Refractive Index Detection written by British Standards Institute Staff and published by . This book was released on 2000-08 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Petroleum, Petroleum technology, Petroleum products, Chemical analysis and testing, Determination of content, Aromatic hydrocarbons, Distillation methods of analysis, Liquid chromatography, Refractive index, Aromatic compounds, Diesel fuels, Contaminants
Download or read book Government Reports Annual Index written by and published by . This book was released on 1987 with total page 1256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Download or read book Government Reports Annual Index Keyword A L written by and published by . This book was released on 1987 with total page 1260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Standard Test Method for Determination of Aromatic Hydrocarbon Types in Middle Distillates High Performance Liquid Chromatography Method with Refractive Index Detection written by and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Application of High Performance Liquid Chromatography to the Analysis of Petroleum Materials Part 1 Qualitative Hydrocarbon type Analysis written by George E. Fodor and published by . This book was released on 1975 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: A preliminary study is presented for a method for the hydrocarbon type analysis of petroleum, its products and related substances by liquid chromatography. Elution volumes of normal-, iso-, and cyclo-paraffins, mono- and diolefins, aromatic hydrocarbons and vic-dibromo alkanes were determined by high performance liquid chromatography on 10 micrometer and 37-75 micrometer silica gel.
Download or read book BS EN 12916 Petroleum Products Determination of Aromatic Hydrocarbon Types in Middle Distillates High Performance Liquid Chromatography Method with Refractive Index Detection written by British Standards Institution and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sample Preparation of Cooking Oils for Determination of Polycyclic Aromatic Hydrocarbons by High Performance Liquid Chromatography written by Thongsuk Payanan and published by . This book was released on 2009 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two sample preparation techniques, low-temperature cleanup and sweep co-distillation, which are simple, fast, inexpensive and using small amount of organic solvent have been developed for the determination of 16 polycyclic aromatic hydrocarbons (PAHs) in refined and used cooking oil samples by high-performance liquid chromatography with fluorescence detection (HPLC-FLD). For low-temperature cleanup method, freezing time, extraction solvent, number of extraction and SPE cleanup affected the extraction efficiency. Optimum extraction was achieved when using a mixture of acetonitrile and acetone (80:20, v/v) as extraction solvent, freezing between -18 oC to -25 oC for 24 hours twice and cleanup with alumina N SPE cartridge. This method was effectively determined all 16 PAHs. The recoveries were 45.88 - 118.47%. Limit of detections (LODs) and limit of quantitations (LOQs) were 0.13 to 3.13 ng/g and 0.25 to 6.25 ng/g, respectively. In sweep co-distillation method, distillation temperature and time had an effect on the extraction efficiency. Optimum extraction was attained when distillated at 235 oC for 60 minutes. However, this method was quantitatively analyzed only 8 PAHs. The recoveries were 47.48 - 119.47%. LODs and LOQs values were about two times higher than low-temperature cleanup method. Finally, both methods were successfully tested for determination of PAHs in reference materials of olive oil (RM FAPAS T0631) and real cooking oil samples.
