Fractionation of polar organic constituents in environmental samples using the lipophilic dextran gels Sephadex LH-20 and Sephasorb HP Ultrafine: Application to a weathered Ekofisk crude oil (Record no. 41307)
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| fixed length control field | 02079nam a2200193Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | MX-MdCICY |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20250625124652.0 |
| 040 ## - CATALOGING SOURCE | |
| Transcribing agency | CICY |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) | |
| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) | B-6970 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 250602s9999 xx |||||s2 |||| ||und|d |
| 245 10 - TITLE STATEMENT | |
| Title | Fractionation of polar organic constituents in environmental samples using the lipophilic dextran gels Sephadex LH-20 and Sephasorb HP Ultrafine: Application to a weathered Ekofisk crude oil |
| 490 0# - SERIES STATEMENT | |
| Volume/sequential designation | Journal of Chromatography A, 214(1), p.83-93, 1981 |
| 520 3# - SUMMARY, ETC. | |
| Summary, etc. | A method has been developed for the enrichment and fractionation of trace amounts of polar organic constituents in environmental samples. The procedure involves two steps using the lipophilic gel filtration gels Sephadex LH-20 and Sephasorb HP Ultrafine in two different modes: (1)separation and isolation of alcohols, phenols, hydroperoxides, acids and highly polar components as a result of retardation of compounds containing hydroxyl groups on Sephadex LH-20 using stepwise gradients of chloroform, methanol and tetrahydrofuran as the mobile phase; (2)liphophilic-hydrophilic partitioning using Sephasorb HP Ultrafine swollen in methanol-water and eluted with stepwise gradients of n-hexane and benzene, which separates non-hydroxyl-containing constituents. The method leads to essentially quantitative recoveries of the different compounds, and is sufficiently rapid and convenient for use in routine analysis. Minimal degradation of the sample components occurs as this is a pure chromatographic procedure on highly inert gel matrices with no catalytic activity, avoiding the acid/alkali extractions and chromatography on more labile gel matrices that often accompany other procedures and usually alter the sample to some extent. The application of the method to a weathered Ekofisk crude oil is described |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Barth, T |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Tjessem, K. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Aaberg, A. |
| 856 40 - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="https://drive.google.com/file/d/1Z8crGnDnYvyPU3Lrvi7UZrE5Gc5vbHam/view?usp=drivesdk">https://drive.google.com/file/d/1Z8crGnDnYvyPU3Lrvi7UZrE5Gc5vbHam/view?usp=drivesdk</a> |
| Public note | Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Clasificación local |
| Koha item type | Documentos solicitados |
| Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Collection | Home library | Current library | Shelving location | Date acquired | Total checkouts | Full call number | Date last seen | Price effective from | Koha item type |
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| Clasificación local | Ref1 | CICY | CICY | Documento préstamo interbibliotecario | 25.06.2025 | B-6970 | 25.06.2025 | 25.06.2025 | Documentos solicitados |