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Improved method for elimination of the interference from nitrate ions on oxalic acid in RP-HPLC by solid-phase extraction with nanosized LaPO4

Citation

Xu, M and Wei, W and Wang, Y and Wang, X and Cui, J and Wei, Z, Improved method for elimination of the interference from nitrate ions on oxalic acid in RP-HPLC by solid-phase extraction with nanosized LaPO4, Journal of Liquid Chromatography and Related Technologies, 35, (14) pp. 1958-1972. ISSN 1082-6076 (2012) [Refereed Article]

Copyright Statement

Copyright 2012 Taylor and Francis

Official URL: http://www.tandfonline.com/toc/ljlc20/35/14

DOI: doi:10.1080/10826076.2011.627614

Abstract

An improved method using nanosized LaPO4 as solid-phase extractor for avoiding the interference from nitrate ions on oxalic acid in RP-HPLC was developed. Nanosized LaPO4 possessed lower solubility and higher adsorption ability for oxalic acid than previous adsorbent. Oxalic acid could be adsorbed selectively by nanosized LaPO4 rather than nitrate, formic acid, malic acid, lactic acid, or citric acid, so the interference from nitrate ions was eliminated, and then the oxalic acid was determined by RP-HPLC at the optimum chromatographic conditions after the solid-phase extraction procedure. The accuracy of the method was confirmed with an average recovery ranging between 97.7% and 107.3%, the relative standard deviations (RSD) were less than 3.0%. This method improved the previous work and was successfully applied to determine the oxalic acid in xylem saps of tomato.

Item Details

Item Type:Refereed Article
Keywords:interference elimination, nanosized LaPO4, oxalic acid, RP-HPLC, solid-phase extraction, xylem sap
Research Division:Chemical Sciences
Research Group:Analytical Chemistry
Research Field:Separation Science
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
Author:Wei, Z (Professor Zhenggui Wei)
ID Code:91134
Year Published:2012
Web of Science® Times Cited:1
Deposited By:Austn Centre for Research in Separation Science
Deposited On:2014-05-09
Last Modified:2017-11-29
Downloads:0

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