Preconcentration and separation of total mercury in environmental samples using chemically modified chloromethylated polystyrene-PAN (ion-exchanger) and its determination by cold vapour atomic absorption spectrometry

Autor:	R. R. Lashein, Magda A. Akl, M. A. H. Hafez, Ibrahim M.M. Kenawy
Rok vydání:	2001
Předmět:	Chromatography Ion exchange Analytical chemistry Infrared spectroscopy chemistry.chemical_element Analytical Chemistry law.invention Mercury (element) Partition coefficient Column chromatography chemistry law Titration Atomic absorption spectroscopy Thermal analysis
Zdroj:	Talanta. 53:749-760
ISSN:	0039-9140
Popis:	The use of chemically modified chloromethylated polystyrene-PAN, CMPS-PAN (ion-exchanger) for the preconcentration and separation of total mercury after digestion in preparation for determination by cold vapour atomic absorption spectrometry (CVAAS) was described. The effects on the percentage of recovered mercury by mass change of ion-exchanger, stirring time, pH of the solution samples and eluent concentration were studied. The distribution coefficient K(d) is 10(6.6) ml g(-1). The interfering effects of some foreign ions were described. The metal complex formed between CMPS-PAN ion-exchanger and mercury was characterized by IR spectroscopy, pH-metric titration and thermal analysis. The method is simple and rapidly applicable for the determination of total mercury (ng ml(-1)) in natural water, milk and urine.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9eef53245877b1fe4be9962a163c535b https://doi.org/10.1016/s0039-9140(00)00524-5 Zobrazit plný text záznamu Full Text from ScienceDirect