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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BCR 146

Citations 2

"Analytical Characteristics Of An Inductively Coupled Plasma Mass Spectrometer Coupled With A Thermospray Nebulization System"
J. Anal. At. Spectrom. 1995 Volume 10, Issue 9 Pages 575-581
Hans Vanhoe, Steven Saverwijns, Magali Parent, Luc Moens and Richard Dams

Abstract: The effects of different matrix salts and mineral acids on analyte ion signals in ICP-MS was evaluated using the thermospray (TS) sample introduction system of Vanhoe et al. (Ibid., 1994, 99, 815). The results were compared with two other sample introduction systems, the pneumatic nebulizer coupled with a spray chamber (the conventional arrangement; CA) and the same nebulizer coupled with the desolvating unit employed with the thermospray nebulizer. Studies were effected with a 10 µg/l multi-element solution of Be, Al, Sc, Co, In, Gd, Tl, Th and U in 0.14 M HNO3 containing 1-5000 mg/l of the matrix elements Na, Ca, P and S (ICP-MS operating conditions tabulated). Non-spectroscopic interferences from Na and Ca were more pronounced for the TS system than the CA but were almost the same for P and S. The TS system was used for the analysis of Cd and Pb in three environmental reference materials (Community Bureau of Reference (BCR) Certified Reference Materials 141R Soil- calcareous loam, 144R sewage sludge-domestic and 146R sewage sludge-industrial, following digestion with aqua regia (experimental details given). A sample flow injection system was used to eliminate memory effects. Results obtained with the TS system agreed more closely with certified values than those obtained with the CA system.
Cadmium Lead Mass spectrometry Sample preparation Reference material Method comparison Interferences

"Automatic Flow Injection System For The Determination Of Heavy Metals In Sewage Sludge By Microwave Digestion And Detection By Inductively Coupled Plasma Atomic-emission Spectrometry."
Fresenius J. Anal. Chem. 1996 Volume 355, Issue 2 Pages 112-119
Luis Bordera, Vicente Hernandis and A. Canals

Abstract: An automated dual-channel flow injection manifold was used to determine heavy metal concentrations of 77.7-4059 µg/g in sewage sludge. A suspension of sewage sludge containing 0.5-0.75% of solids in 1.5 M HNO3 was loaded into a digestion coil (3 m x 0.8 mm i.d.) and subjected to microwave radiation at 662 W for 360 s. The digest (~e;6 ml) was inserted into a 1.5 M HNO3 carrier stream (1 ml/min) and propelled to the sequential ICP-AES spectrometer where signals for Zn (213.856 nm), Cu (324.756 nm), Pb (220.353 nm), Cr (283.563 nm), Cd (228.802 nm) and Ni (231.604 nm) were recorded. The method was validated by analyzing a certified reference material (BCR No. 146) and relative errors of -4.8 to +2% were obtained for all elements apart from Ni (-10.4%). The complete analysis took ~e;12 min.
Metals, heavy Zinc Copper Lead Chromium Cadmium Nickel Sample preparation Spectrophotometry Reference material Microwave Online digestion Slurry