Optimisation of the background electrolyte for the determination of anions by capillary electrophoresis: application to sweet whey

نویسندگان

  • Murielle Rabiller-Baudry
  • Bernard Chaufer
  • Romain Jeantet
چکیده

In capillary electrophoresis, the background electrolyte (BGE) composition is the key parameter for achieving the quantification of ions. This study is focused on the optimization of a BGE for anion separation (buffer, UV sensor, electroosmotic flow modifier and pH), and its application to whey anions. The quantification of chloride, sulfate, citrate and phosphate, was achieved with a relative standard deviation of about 1% for chloride and about 5---6% for the other anions, and compared to conventional one-by-one anion titration methods. © InralElsevier, Paris. capillary electrophoresis 1whey 1 anion 1 background electrolyte Résumé Optimisation de l'électrolyte support pour le dosage des anions par électrophorèse capillaire: application au lactosérum doux. En électrophorèse capillaire, la composition de l'électrolyte support (BGE) est le paramètre clef pour quantifier les ions. Le but de cette étude est l'optimisation d'un BGE permettant l'analyse des anions (tampon, détection en UV-inverse, modificateur de flux électroosmotique et pH) et son application au dosage des anions du lactosérum. Le dosage quantitatif des chlorure, sulfate, citrate et phosphate est réalisé avec une répétabilité correcte (écart type relatif 1 % pour le chlorure et entre 5 % et 6 % pour les autres anions). La comparaison de l'électrophorèse capillaire et de méthodes de dosage des anions un par un par des techniques usuelles est également présentée. © InralElsevier, Paris. électrophorèse capillaire 1 lactosérum 1 anion 1 électrolyte support * Correspondence and reprints.

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تاریخ انتشار 2016