The voltammetric determination of Mo in seawater after adsorptive accumulation of the Eriochrome Blue Black R complex

Autor:	J. A. Page, S. N. Willie, S. S. Berman, G. W. VanLoon
Rok vydání:	1987
Předmět:	Detection limit Chemistry Organic Chemistry Analytical chemistry chemistry.chemical_element General Chemistry Reference electrode Catalysis Mercury (element) Adsorption Molybdenum Linear sweep voltammetry Seawater Voltammetry
Zdroj:	Canadian Journal of Chemistry. 65:957-960
ISSN:	1480-3291 0008-4042
DOI:	10.1139/v87-162
Popis:	A method for direct determination of molybdenum in seawater has been developed, and uses linear sweep voltammetry after adsorptive accumulation of the Erichrome Blue Black R (EBBR) complex on a static mercury drop electrode. To an acidified (pH 1.6) seawater (SW) sample, 6.0 × 10−6 M EBBR is added and preconcentration by adsorption is carried out for 30 s at a potential of −0.05 V vs. the Ag/AgCl/SW reference electrode. The potential is then scanned in the negative direction, giving a current peak for the reduction of the Mo—EBBR complex at −0.17 V. Under these conditions the limit of detection is 0.50 ng/mL. Experimental results for Mo in seawater using this technique agree well with certified values for two reference seawater samples (NASS-1, CASS-1).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::23b4ecdd874345740aa0394d0bec68df https://doi.org/10.1139/v87-162 Zobrazit plný text záznamu