Separation of picogram quantities of Cr(iii) and Cr(vi) species in aqueous solutions and determination by graphite furnace atomic absorption spectrometry

Autor:	Jonna Jokiniemi, Markku Ahlgrén, Sirpa Peräniemi, Sanna Latva
Rok vydání:	2003
Předmět:	Detection limit Chromium Aqueous solution Adsorption Activated charcoal chemistry Analytical chemistry chemistry.chemical_element Graphite furnace atomic absorption Mass spectrometry Spectroscopy Analytical Chemistry
Zdroj:	J. Anal. At. Spectrom.. 18:84-86
ISSN:	1364-5544 0267-9477
DOI:	10.1039/b207941k
Popis:	A procedure was developed for the separation and independent determination of picogram quantities of Cr(III) and Cr(VI) in aqueous solution. Cr(VI) was adsorbed onto iron-loaded activated charcoal (FeC*), while Cr(III) was left in the filtrate and was measured directly by graphite furnace atomic absorption spectrometry (GFAAS). The Cr(VI) adsorbed on FeC* was released with 2.0 M HCl before measurement by GFAAS. The detection limits were 7.0 pg for total Cr, 1.9 pg for Cr(III) and 6.8 pg for Cr(VI). The recoveries were 98 ± 4 for total Cr, for Cr(III) 97 ± 3 and for Cr(VI) 101 ± 7. The procedure was tested with the Ground Water and Waste Pollution Control Check Standard WP-15 spiked with Cr(VI) and with samples from the plating industry.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0967c3aecfd2ae7316b12b088565c2c1 https://doi.org/10.1039/b207941k Zobrazit plný text záznamu