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Determination of oxalate, sulfate and nitrate in honey and honeydew by ion-chromatography
M J del Nozal1, J L Bernal, J C Diego
1Analytical Chemistry Department, Faculty of Sciences, University of Valladolid, Spain.
Abstract:
An ion chromatographic method for determining the anions oxalate, sulfate and nitrate in honey and honeydew samples is described. To prevent matrix interference and to isolate the anions a clean-up step using solid-phase extraction on anionic cartridges and eluting with a 0.01 M chromate solution is recommended. The anions are separated on an anionic column with a mobile phase of borate-gluconate buffer and using conductimetric detection. The method is applied to the analysis of samples from different botanical origin.
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