Determination of nitrates, nitrites and oxalates in food products by capillary electrophoresis with pH-dependent electroosmotic flow reversal

被引：107

作者：

Merusi, Cristiana ^{[1
]}

Corradini, Claudio ^{[1
]}

Cavazza, Antonella ^{[1
]}

Borromei, Chiara ^{[1
]}

Salvadeo, Paola ^{[1
]}

机构：

[1] Dipartimento Chim Gen & Inorgan, I-43100 Parma, Italy

来源：

FOOD CHEMISTRY | 2010年 / 120卷 / 02期

关键词：

Nitrate; Nitrite; Oxalate; Capillary electrophoresis; Electroosmotic flow reversal; Table sugar; Dietary fibres; ZONE-ELECTROPHORESIS; VEGETABLES; SPINACH; STORAGE; ANIONS;

D O I：

10.1016/j.foodchem.2009.10.035

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

This paper describes an innovative and rapid capillary electrophoretic method for the simultaneous analysis of nitrates. nitrites and oxalates, which are anions of food interest. The novelty of our method is based on reversing the electroosmotic flow without using any buffer additive nor performing a capillary coating, but simply employing a buffer at low pH values. The analytical conditions have been optimised and the proposed method has been fully validated following the EURACHEM guidelines. The method has been successfully applied to the analysis of different vegetable samples: furthermore nitrates' content has been evaluated for the first time in table sugars and dietary fibres. A comparison of our results with those obtained by a common HPLC method has also been carried out. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：615 / 620

页数：6

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