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Sample preparation and heavy metal determination by atomic spectrometry /

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dc.contributor.author Xiao, Jing. en_US
dc.date.accessioned 2009-06-29T14:36:53Z
dc.date.available 2009-06-29T14:36:53Z
dc.date.issued 2004-06-29T14:36:53Z
dc.identifier.uri http://hdl.handle.net/10464/1649
dc.description.abstract Microwave digestions of mercury in Standards Reference Material (SRM) coal samples with nitric acid and hydrogen peroxide in quartz vessels were compared with Teflon® vessel digestion by using flow injection cold vapor atomic absorption spectrometry. Teflon® vessels gave poor reproducibiUty and tended to deliver high values, while the digestion results from quartz vessel show good agreement with certificate values and better standard deviations. Trace level elements (Ag, Ba, Cd, Cr, Co, Cu, Fe, Mg, Mn, Mo, Pb, Sn, Ti, V and Zn) in used oil and residual oil samples were determined by inductively coupled plasma-optical emission spectrometry. Different microwave digestion programs were developed for each sample and most of the results are in good agreement with certified values. The disagreement with values for Ag was due to the precipitation of Ag in sample; while Sn, V and Zn values had good recoveries from the spike test, which suggests that these certified values might need to be reconsidered. Gold, silver, copper, cadmium, cobalt, nickel and zinc were determined by continuous hydride generation inductively coupled plasma-optical emission spectrometry. The performance of two sample introduction systems: MSIS™ and gas-liquid separator were compared. Under the respective optimum conditions, MSIS^"^ showed better sensitivity and lower detection limits for Ag, Cd, Cu, Co and similar values for Au, Ni and Zn to those for the gas-liquid separator. en_US
dc.language.iso eng en_US
dc.publisher Brock University en_US
dc.subject Heavy metals. en_US
dc.subject Atomic spectroscopy. en_US
dc.subject Mineralogy, Determinative. en_US
dc.title Sample preparation and heavy metal determination by atomic spectrometry / en_US
dc.type Electronic Thesis or Dissertation en_US
dc.degree.name M.Sc. Chemistry en_US
dc.degree.level Masters en_US
dc.contributor.department Department of Chemistry en_US
dc.degree.discipline Faculty of Mathematics and Science en_US


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