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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Inorganic compound

Classification: Inorganic compound -> aluminum oxide

Citations 2

"Comparative Analysis Of Aluminum Oxide Powders By Inductively Coupled Plasma-mass Spectrometry With Low And High Mass Resolution"
J. Anal. At. Spectrom. 1996 Volume 11, Issue 9 Pages 797-803
Norbert Jakubowski, Wolfgang Tittes, Dagmar Pollmann, Dietmar Stuewer and José A. C. Broekaert

Abstract: ICP-MS with low and moderate mass resolution was applied to the determination of trace elements (B, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Zr, Ba, La and Ce) in two different pare Al2O3 powders after decomposition. Four different sets of measurements were performed: (1) with quadrupole instrument in standard operation; (2) with the same instrument including an online matrix trace separation step; (3) with a double-focusing magnetic field instrument operated at;low resolution (R=300); and (4) with the same instrument operated with moderate resolution (R=3000). Generally, the quantitative results obtained with the four different techniques are in good agreement. Application of the double-focusing instrument with moderate mass resolution permitted the determination of spectrally interfering elements such as V, Cr, Mn, Fe and Ga in Al2O3 in the 0.04-10 µg g-1 range far above the detection limit. For all four applied techniques, blank values arising from the reagents and instrumentation were a major limitation for a number of elements, and the lowest detection limits were obtained in each instance for elements that do not suffer from limitations due to blank values.
Trace elements Boron Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Zirconium Barium Lanthanum Cerium Mass spectrometry Interferences Method comparison

"Flow Injection Spectrophotometric Determination Of Silicon Dioxide In Aluminum Oxide"
Fenxi Shiyanshi 1995 Volume 14, Issue 5 Pages 37-39
Zhang, Z.J.;Chen, Q.Y.;Ren, F.L.;Xu, J.H.

Abstract: A 5 mL portion of alkaline Al2O3 solution was 50-fold diluted and the pH was adjusted to 3-4. Portions (120 µL) of the solution were injected into a stream of 8% ammonium molybdate (3.65 ml/min) in a FIA system and mixed in a reactor (170 cm x 0.8 mm i.d.) at 50°C. The mixed solution was merged with a stream of mixed acid [25 g oxalic acid in 500 mL H2SO4 (1:19)] at 4.2 ml/min in a reaction tube (70 cm x 0.8 mm i.d.) and then with a stream of 8% ascorbic acid (2.1 ml/min) in a reactor (50 cm x 0.8 mm i.d.) and detection of the colored product formed at 760 nm (ε = 20000). Beer's law was obeyed up to 20 µg/ml SiO2 and the detection limit was 0.322 µg/ml. Recoveries were 98.5-101.2%. Interferences from P(V), As(V) and Fe(III) were masked with oxalic acid. Sampling frequency was 120 runs per h.
Silicon dioxide Spectrophotometry Heated reaction Interferences