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- W1972311012 abstract "Indoles can be desalted and fractionated by adsorption on the neutral poly-styrene resin Porapak Q® and eluted with distilled water and aqueous alcohols. A procedure for the rapid extraction of 5-hydroxyindoleacetic acid from urine is described. The adsorption coefficients of indole, indole-3-acetic acid, 5-hydroxyindole-3-acetic acid, tryptamine, serotonine, tryptophan and 5-hydroxytryptophan have been determined in 0.1 N HCl (I), 5 mM glycine buffer of pH 9 (II), 1 M NaCl-5 mM glycine buffer of pH 9 (III), and 0.1 N sodium hydroxide (IV). Adsorption was found to depend on pH and salt concentration. Acids are most strongly adsorbed in I, bases in IV, and hydroxyindolic acids run through in IV, allowing their isolation from other indoles." @default.
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- W1972311012 date "1971-01-01" @default.
- W1972311012 modified "2023-09-25" @default.
- W1972311012 title "Simple extraction of indole derivatives from aqueous solution by adsorption on neutral polystyrene resin" @default.
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- W1972311012 doi "https://doi.org/10.1016/s0021-9673(00)92387-2" @default.
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