全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

Determination of vitamin B6 (pyridoxine) in pharmaceutical preparations by cyclic voltammetry at a copper(II) hexacyanoferrate(III) modified carbon paste electrode

DOI: 10.1590/S0103-50532003000200021

Keywords: modified carbon paste electrode, copper(ii) hexacyanoferrate(iii), voltammetric determination, pharmaceutical preparations.

Full-Text   Cite this paper   Add to My Lib

Abstract:

a copper(ii) hexacyanoferrate(iii) (cuhcf) modified carbon paste electrode was used for the electroanalytical determination of pyridoxine (vitamin b6) in pharmaceutical preparations, using cyclic voltammetry. diverse parameters were investigated for the optimization of the sensor response, such as composition of the electrode, electrolytic solution, effect of ph, scan rate of potential and interferences. the optimum conditions were found at an electrode composition of 20% cuhcf, 55% graphite and 25% mineral oil (m/m) in an acetate buffer (ph 5.5) containing 0.05 mol l-1 of nacl. the range of determination of pyridoxine was from 1.2 x 10-6 to 6.9 x 10-4 mol l-1. the procedure was successfully applied to the determination of vitamin b6 in formulation preparations. the cuhcf modified carbon paste electrode gave results comparable to those obtained using spectrophotometry.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133