title: Extraction of urinary organic acids by combined barium salt precipitation-anion exchange.
mesh_terms: D000328:Adult; D000837:Anion Exchange Resins; D001464:Barium; D002264:Carboxylic Acids / Q000652:urine*; D011232:Chemical Precipitation; D002849:Chromatography, Gas; D002852:Chromatography, Ion Exchange; D006801:Humans; D007223:Infant; D010710:Phosphates / Q000652:urine; D013431:Sulfates / Q000652:urine; D014297:Trimethylsilyl Compounds
chemical_list: D000837:Anion Exchange Resins; D002264:Carboxylic Acids; D010710:Phosphates; D013431:Sulfates; D014297:Trimethylsilyl Compounds; D001464:Barium