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REVISTA DE CHIMIE
Cite as: Rev. Chim.
https://doi.org/10.37358/Rev.Chim.1949

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Revista de Chimie (Rev. Chim.), Year 2007, Volume 58, Issue 1,





Rapid Separation and Determination of Organic Acids in Bauxite
by RP-HPLC after Solid-Phase Extraction

Abstract:

A rapid revised phase-high performance liquid chromatographic (RP-HPLC) method for the determination of organic acids in bauxite was reported. Oxalic, malonic, acetic, succinic, glutaric and adipic acid were separated and quantified in 10 min. First time repeatability, reproducibility and recoveries were determined out for these acids in bauxite. The organic acids were removed from bauxite by using a solid-phase extraction procedure with anion-exchange cartridges. The chromatographic separation was achieved with only one Kromasil RP-C18 column thermo stated at 25 °C. Organic acids were detected with a UV-vis detector (215 nm). The precision results showed that the relative standard deviations of the repeatability and reproducibility were [2.13% and [3.24%, respectively. The method accuracy was confirmed with an average recovery ranging between 89.2 and 114.7%. Under optimum conditions, the detection limits ranged from 0.042 to 10.36 mg/L. Keywords: organic acid, determination, bauxite, RP-HPLC

Issue: 2007, Volume 58, Issue 1
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