University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

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Classification: Oil -> heavy

Citations 2

"Determination Of Trace Elements In Heavy Oil Samples By Graphite Furnace And Cold Vapor Atomic Absorption Spectrometry After Acid Digestion"
Anal. Chim. Acta 1995 Volume 311, Issue 1 Pages 85-91
Minna Turunen*, Sirpa Peräniemi, Markku Ahlgrén and Henrik Westerholm

Abstract: A procedure was developed to determine the concentrations of trace elements (As, Cd, Co, Cr, Cu, Hg, Mn, Ni, Pb and V) in heavy oil samples. The wet digestion (HNO3-H2SO4) method developed for the sample preparation was both repeatable and quantitative and allowed element determinations by graphite furnace atomic absorption spectrometry (GFAAS) or cold vapor atomic absorption spectrometry (CVAAS) from the same sample solution. The detection limits were low, and low concentrations of analyte could be determined accurately. V and Ni were determined also by inductively coupled plasma atomic emission spectrometry (ICP-AES), in samples merely diluted with xylene (1:10), the 1CP-AES results were in good agreement with the GFAAS results.
Mercury Spectrophotometry Spectrophotometry Sample preparation

"Determination Of Lead In Heavy Oil By Flow Injection Flame Atomic Absorption Spectrometry"
J. Chin. Chem. Soc. 1988 Volume 35, Issue 6 Pages 399-403
Hwang, Jon-Mau

Abstract: A simple on-line flow injection analysis pre- concentration technique has been developed. The flow injection system consisted of a 4-channel peristaltic pump, two 6-way rotary injection valves containing a microcolumn of Chelex-100 resin, and a flame atomic absorption spectrometer, allowing the determination of lead at a concentration as low as ppb. The degree of pre-concentration depended on the injected sample volume. Lead contained in NBS 1634b and other heavy oil samples was determined using the system. Samples were ashed directly in a furnace at 550°C for two hours, dissolved with perchloric acid and then injected into the system. The sampling frequency also depended on the injected sample volume.
Lead Ion exchange Spectrophotometry Preconcentration