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- W2465836718 abstract "Ten organic acids are extracted from urine. Two extraction methods are used: anion exchange on DEAE-Sephadex columns and organic solvent extraction with five different solvents: diethyl ether, ethyl acetate, isopropyl chloride, light petroleum, and tetrahydrofuran. In order to quantify the extractions, the corresponding 14C-labeled acids are added to standard acid solutions and extraction rates are measured by a liquid scintillation counting system. The results show that: (1) The efficiency of anion exchange is generally good for all tested acids. (2) The extraction efficiency is not identical for the different solvents, one solvent being more efficient for a certain acid than another: tetrahydrofuran, which is generally a good solvent, is too hygroscopic to be usable. Isopropyl chloride and light petroleum are too specific with the most apolar molecules. Ethyl acetate and diethyl ether are similar and usable because of their acceptable solubilisation power as to the most polar molecules, their good solubilisation reproducibility and their readiness of use. (3) The solvent extraction method is not as time-consuming as the anion-exchange method which generally requires lengthy elution and extraction." @default.
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- W2465836718 date "1982-03-12" @default.
- W2465836718 modified "2023-09-26" @default.
- W2465836718 title "[Study of the extraction of organic acids from urine. Preliminary step to their gas chromatographic separation (author's transl)]." @default.
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