title: Determination of oxalic acid in biological matrices by liquid chromatography with amperometric detection.
abstract: Oxalic acid was separated from interfering compounds with a solvent-generated ion-exchange chromatographic system, and detected with a copper electrode amperometric detector. The lower limit of detection in standard solutions was 5 ng. Complex samples, such as vegetable extracts and urine, could be analysed with a minimum of sample preparation.
mesh_terms: D002593:Cetrimonium Compounds; D055598:Chemical Phenomena; D002621:Chemistry; D002852:Chromatography, Ion Exchange / Q000379:methods; D002853:Chromatography, Liquid / Q000379:methods; D004566:Electrodes; D006801:Humans; D007202:Indicators and Reagents; D008293:Malates / Q000032:analysis; D008314:Malonates / Q000032:analysis; D010070:Oxalates / Q000032:analysis* / Q000652:urine; D019815:Oxalic Acid; D010649:Phenylalanine / Q000032:analysis; D013644:Tartrates / Q000032:analysis; D014675:Vegetables / Q000032:analysis
chemical_list: D002593:Cetrimonium Compounds; D007202:Indicators and Reagents; D008293:Malates; D008314:Malonates; D010070:Oxalates; D013644:Tartrates; D010649:Phenylalanine; C030298:malic acid; D019815:Oxalic Acid; C030290:malonic acid; C029768:tartaric acid