Iron (III) porphyrin bearing 2,6-di-tert-butylphenol pendants deposited onto gold electrodes for amperometric determination of l-histidineстатья

Статья опубликована в высокорейтинговом журнале

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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.

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[1] Iron (iii) porphyrin bearing 2,6-di-tert-butylphenol pendants deposited onto gold electrodes for amperometric determination of l-histidine / K. Kurzątkowska, D. Shpakovsky, J. Radecki et al. // Talanta. — 2009. — Vol. 78, no. 1. — P. 126–131. A sensitive amperometric sensor for determination of l-histidine was developed using gold electrode modified with Fe(III)-porphyrin bearing three 2,6-di-tert-butylphenol groups and one palmitoyl chain. Two methods of electrode modification were applied: direct chemisorption and embedment into dodecanethiol monolayer. Both types of electrodes were used for detection of l-histidine using Osteryoung square-wave voltammetry. The sensitivity of sensors presented towards l-histidine depends on the method of electrode modification. The detection limits observed for the electrodes incorporating with Fe(III)-porphyrin host by embedment and chemisorption were in 1 and 100 nM ranges, respectively. In addition, the determination of l-histidine with electrode modified by embedment technique was more precise, in comparison to that obtained by the direct chemisorption. Applicability of gold electrodes modified with Fe(III)-porphyrin for the direct electrochemical determination of l-histidine was demonstrated using the artificial matrix mimicking human serum. [ DOI ]

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