These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.
Pubmed for Handhelds
PUBMED FOR HANDHELDS
Search MEDLINE/PubMed
Title: Catalytic hydrogen evolution in the presence of methylthiohydantoin-glycine and cobalt(II) ion: a study by cathodic stripping voltammetry at a hanging mercury drop electrode. Author: Bănică FG, Spătaru N. Journal: Talanta; 1999 Feb; 48(2):491-4. PubMed ID: 18967489. Abstract: The carbon-sulfur bond in methylthiohydantoin-glycine (MTH-Gly) is broken during the deposition on the mercury electrode at potentials around -0.1 V versus SCE, giving mercury sulfide which is detected by the characteristic cathodic peak at -0.7 V. If cobalt (II) is also present, the product of the deposition step is a mixture of mercury and cobalt sulfides. During the cathodic scan, the last one is reduced to a transient Co(0) species that catalyses the reduction of hydrogen ion to the hydrogen molecule by a mechanism alike to that emphasized for the Co(II)-sulfide ion system (F.G. Bănică, N. Spătaru, T. Spătaru, Electroanalysis 9 (1997) 1341). This electrode process induces a cathodic peak at -1.4 V that enables the determination of MTH-Gly down to 10(-7) M in the borax buffer at pH 8.5. The possible extension of this method to other classes of organic sulfur compounds is briefly discussed.[Abstract] [Full Text] [Related] [New Search]