A new and simple procedure for the trace determination of mercury using differential pulse polarography and application to a salt lake sample

Autor:	ŞENDİL, OLCAY, Caliskan, A. Cengiz, Somer, Guler
Rok vydání:	2015
Předmět:	General Chemistry The procedure is simple: to a known amount of sulfite in the polarographic cell (HAc pH 6 or 7) is added an unknown Hg(II) sample. The Hg(II) concentration is calculated simply from the decrease in the sulfite peak after reaction with Hg(II). The limit
Zdroj:	Volume: 39, Issue: 3 639-647 Turkish Journal of Chemistry
ISSN:	1303-6130 1300-0527
DOI:	10.3906/kim-1412-19
Popis:	A new and simple differential pulse polarographic procedure was established for the trace determination of mercury(II). An indirect method had to be used since no polarographic peak can be observed for its direct determination. According to their standard potentials, the reaction between SO$_{3}^{2-}$ and Hg(II) was suitable. The peak height of sulfite at about -0.70 V (pH 6, 7) was sharp, high, and very reproducible, enabling the accurate determination of low concentrations of Hg(II). It was found that sulfite concentration had to be 3 times larger than mercury at pH 6, in order to have a quantitative reaction.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4dae3bb645a7c2a5d4063e57f3640651 https://doi.org/10.3906/kim-1412-19 Zobrazit plný text záznamu Plný text ve formátu PDF