title: The determination of oxalate in urine and urinary calculi by a new ion-chromatographic technique.
abstract: A new method is described for the measurement of oxalate in urine and urinary calculi using medium pressure ion-chromatography. The technique is simple, requires minimal sample preparation and only 20 min analysis time. The minimum detection limit for oxalate is 0.5 mumol/l in the diluted sample as applied to the analyser. The intra-run coefficient of variation for the chromatography stage alone is 3.8%. The overall intra-run and inter-run coefficients of variation, including the sampling and dilution of urine, are 6.5 and 8.3% respectively. The method compares well with an established colorimetric technique for the analysis of oxalate both in urine and in urinary calculi.
mesh_terms: D002852:Chromatography, Ion Exchange; D003124:Colorimetry; D006801:Humans; D010070:Oxalates / Q000652:urine*; D019815:Oxalic Acid; D014545:Urinary Calculi / Q000652:urine*
chemical_list: D010070:Oxalates; D019815:Oxalic Acid