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 -> iron oxide

Citations 3

"Use Of Flow Injection Flame Atomic Absorption Spectrometry For Slurry Atomization. Determination Of Copper, Manganese, Chromium And Zinc In Iron Oxide Pigments"
Analyst 1991 Volume 116, Issue 5 Pages 517-520
gnacio López García, Francisca Ortiz Sobejano and Manuel Hernández Córdoba

Abstract: Dried samples were ground in a ball mill for 5 min and 0.5 g of the sample was treated with 0.5 g of hexametaphosphate and diluted to 50 mL with water. After stirring for 10 min, the sample was injected into the flow injection manifold for flame AAS detection. Matrix effects were avoided by calibration with use of slurries prepared from previously analyzed iron oxide samples. Excellent agreement was found between the results of the slurry procedure and those obtained by conventional acid-dissolution in the determination of Cu, Mn, Cr and Zn in iron oxide pigments.
Chromium Copper Manganese Zinc Spectrophotometry Automation Slurry Method comparison Interferences

"Flow Injection Sample-to-standard Additions Method Using Atomic Absorption Spectrometry Applicable To Slurries"
Analyst 1991 Volume 116, Issue 8 Pages 831-834
Ignacio López García, Francisca Ortiz Sobejano and Manuel Hernández Cordoba

Abstract: The flow injection sample-to-standard additions method of Israel and Barnes (Ibid., 1989, 114, 843) has been extended and tested on aqueous slurries of iron oxide pigments by using a standard analyte solution as carrier. The equation derived allows the calculation of analyte concentration. in a sample from only the signal from injection of the slurry and that from a standard solution The equation was applied to 0.2% slurries of Zn and 1% slurries of Cu, Mn and Cr. Results agreed well with those obtained by conventional methods.
Chromium Copper Manganese Zinc Spectrophotometry Slurry Method comparison Standard additions calibration

"FIA Cold Vapor AAS Determination Of Traces Of Mercury In Iron Oxides"
Lihua Jianyan, Huaxue Fence 1996 Volume 32, Issue 6 Pages 346-347
Chen, R.H.

Abstract: The sample (1 g) was gently boiled with 32 mL aqua regia (1:1) for 20 min to achieve complete dissolution. After cooling, water was added up to 100 mL. Next, 60 g/l SnCl2 (reducing agent) was pumped into the continuous-flow Hg vapor generator (diagram given); a portion of the sample was injected to react with the reducing agent. The generated Hg vapor was transferred with a carrier gas of N2 at a flow rate of 500 ml/min to the AAS instrument; detection was at 253.7 nm. Calibration graphs were linear from 0.4-6 x 103 mg/kg. Up to 7.4 g/l matrix Fe did not interfere. The method was used in the analysis of reagent- and animal feed- grade Fe2O3; recoveries were 94-100%.
Mercury Sample preparation Spectrophotometry Interferences Volatile generation Volatile generation