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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High purity

Citations 1

"Study And Application Of A Method For The Determination Of Metallic Elements By ICP-AES With Preconcentration On An Active Carbon-silica Gel Microcolumn In A FI System"
Fresenius J. Anal. Chem. 1998 Volume 360, Issue 6 Pages 721-723
Hongnian Ji, Zhenhuan Liao, Junmei Sun, Zucheng Jiang, Hongnian Ji, Zhenhuan Liao, Junmei Sun, Zucheng Jiang

Abstract: Using active carbon-silica gel as adsorbent and sodium diethyldithiocarbamate (NaDDTC) as chelating reagent in a flow injection system, an ICP-AES method was developed for pre-concentration and determination of trace metallic elements in high purity rare earth oxides. The experimental parameters such as pH, flow rate, amt. of adsorbent, length of reaction coil and eluent acidity were optimized. At pH 4.6 Al, Cr, Cu, Fe, Pb, V, Zn could be pre-concentrated, and subsequently determined by ICP-AES. This method can eliminate matrix effects. Its enrichment factors were 8.1-12.6 with detection limits in the ng/mL range and RSD of 2.3-5.0. This method was applied to the analysis of high purity of La2O3, and Eu2O3 with satisfactory results.
Aluminum Chromium Copper Iron Lead Vanadium Zinc Spectrophotometry Activated carbon Silica gel Preconcentration Chelation Diethyldithiocarbamate Optimization