Monatsh Chem (2017) 148:1595–1597 DOI 10.1007/s00706-017-1996-7 SHORT COMMUNICATION Hydrogen sulﬁde detection by poly(methylene blue) modiﬁed highly oriented pyrolytic graphite electrode 1,2 1 2 • • Magda Zla´malova´ Pavel Janda Karel Nesmeˇra´k Received: 26 February 2017 / Accepted: 9 May 2017 / Published online: 4 July 2017 Springer-Verlag Wien 2017 Abstract The electropolymerization of phenothiazine Introduction derivative, methylene blue (MB), on the surface of a basal plane highly oriented pyrolytic graphite (HOPG) was The development of sensitive and accurate methods of studied. Highly oriented pyrolytic graphite electrodes hydrogen sulﬁde determination is still required, as it is a modiﬁed with the polymeric methylene blue (HOPG/pMB) highly toxic compound with negative environmental was prepared by potential cycling in aqueous electrolyte properties. Moreover, hydrogen sulﬁde has been recently solution containing a dissolved monomeric form of MB. entitled as the third gasotransmitter and biologically rele- The electrocatalytic activity of the electrode toward vant signaling molecule of comparable importance as hydrogen sulﬁde was examined. In the presence of carbon monoxide or nitric oxide [1, 2]. Endogenous hydrogen sulﬁde, a new oxidation peak at potential about hydrogen sulﬁde has many physiological functions and ?0.340 V (vs. SCE) has arisen. No current signals corre- shows auspicious therapeutic
Monatshefte für Chemie - Chemical Monthly – Springer Journals
Published: Jul 4, 2017
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