Study on the electrochemiluminescent behavior of menadione sodium bisulfite in presence of luminol

Zhenyu Lin; Jinhua Chen; Guonan Chen

doi:10.1016/j.talanta.2007.03.038

Study on the electrochemiluminescent behavior of menadione sodium bisulfite in presence of luminol

Talanta. 2007 Jul 31;72(5):1681-6. doi: 10.1016/j.talanta.2007.03.038. Epub 2007 Mar 25.

Authors

Zhenyu Lin¹, Jinhua Chen, Guonan Chen

Affiliation

¹ Ministry of Education Key Laboratory of Analysis and Detection Technology for Food Safety, Fuzhou University, China.

PMID: 19071816
DOI: 10.1016/j.talanta.2007.03.038

Abstract

Menadione sodium bisulfite (MSB) is a stable water-soluble derivative of Vitamin K(3), which is found to be able to enhance the ECL of luminol at potential of 0.88 V in phosphate buffer solution. The conditions for the enhanced ECL, such as the selection of the type of buffer solution, applied potential mode, scanning rate, the effect of pH and concentration of luminol have been investigated in detail in this paper. Under the optimum conditions, the enhanced ECL intensity is linear with the concentration of MSB over a wide range, the detection limit for MSB is 3.0x10(-7)mol/L. The proposed method has been applied to determine the MSB in the commercial injection samples. A possible mechanism for the enhanced ECL of luminol by MSB has also been proposed.