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 |
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Authors: | Hongnian Ji Zhenhuan Liao Junmei Sun Zucheng Jiang Hongnian Ji Zhenhuan Liao Junmei Sun and Zucheng Jiang |
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Institution: | (1) Department of Chemistry, Wuhan University, Wuhan 430072, P.R. China, CN |
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Abstract: | Using active carbon-silica gel as adsorbent and sodium diethyldithiocarbamate (NaDDTC) as chelating reagent in a flow injection
system, an ICP-AES method has been developed for preconcentration and determination of trace metallic elements in high purity
rare earth oxides. The experimental parameters such as pH, flow rate, amount of adsorbent, length of reaction coil and eluent
acidity were optimized. At pH 4.6 Al,Cr,Cu,Fe,Pb,V,Zn could be preconcentrated, 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.
Received: 24 April 1997 / Revised: 22 September 1997 / Accepted: 7 October 1997 |
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