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1997-01-01Zeitschriftenartikel DOI: 10.1515/cclm.1997.35.4.305
The Direct Determination of Urinary Oxalate by Non-Suppressed Ion Chromatography
Pfeiffer, Katy
Berg, Wolfgang
Bongartz, Daniel
Hesse, Albrecht
In this paper we describe a simple ion Chromatographie method for determination of oxalate in urine. Acidified urine was diluted 1 : 2 with 0.03 mol/1 benzidine hydrochloride in 0.3 mol/1 boric acid to precipitate sulphate. The supernatant was passed through a C18-cartridge and 100 μΐ of eluant were injected into an ion Chromatographie system. Oxalate was measured by nonsuppressed conductivity detection. The detection limit for urinary oxalate was 0.05 mmol/1. The recovery for spiked urine samples was 101.5% with a CV of 4.5%. The within- and between-assay coefficients of variation were less than 4.5% and 2.5%, respectively. We found the results obtained by this method to be statistically equivalent to an enzymatic assay and a different ion-chromatographic method.
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DOI
10.1515/cclm.1997.35.4.305
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https://doi.org/10.1515/cclm.1997.35.4.305
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