TITLE

Speciation analysis of mercury in water samples by cold vapor atomic absorption spectrometry after preconcentration with dithizone immobilized on microcrystalline naphthalene

AUTHOR(S)
Haji Shabani, Ali Mohammad; Dadfarnia, Shayessteh; Nasirizadeh, Navid
PUB. DATE
March 2004
SOURCE
Analytical & Bioanalytical Chemistry;Mar2004, Vol. 378 Issue 5, p1388
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Trace amounts of inorganic mercury (Hg2+) and methylmercury cations (MeHg2+) were adsorbed quantitatively from acidic aqueous solution onto a column packed with immobilized dithizone on microcrystalline naphthalene. The trapped mercury was eluted with 10 ml of 7 mol L-1 hydrochloric acid solution. The Hg2+ was then directly reduced with tin (II) chloride, and volatilized mercury was determined by cold vapor atomic absorption spectrometry (CVAAS). Total mercury (Hgt) was determined after decomposition of MeHg+ into Hg2+. Hg2+ and MeHg+ cations were completely recovered from the water with a preconcentration factor of 200. The relative standard deviation obtained for eight replicate determinations at a concentration of 0.3 μg L-1 was 1.8%. The procedure was applied to analysis of water samples, and the accuracy was assessed via recovery experiment.
ACCESSION #
15124883

 

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