System for detecting transition and rare earth elements in a mat

Details System for detecting transition and rare earth elements in a mat System for detecting transition and rare earth elements in a mat

1989-03-02

1992-06-30

Lacey, David L.

Chemistry: analytical and immunological testing

Metal or metal containing

Organometallic compound determined

436 79, 436 80, 436 81, 436 82, 436 84, 436161, 210656, 210672, 210688, 210674, G01N 3014, G01N 3320

Patent

active

051262720

ABSTRACT:
A method for the detection of trace transition elements and rare earth elements in a sample also containing alkali metals or alkaline earth elements. The sample is flowed through a chelator column which retains the transition elements and rare earth elements. Then a first eluent (e.g. ammonium acetate) is passed through the column to strip the alkali and alkaline earth metals retained on the column. Then a second eluent (e.g. a strong acid) is passed through the chelator column to remove the transition elements in a chelator effluent which flows through an ion exchange resin concentrator to retain only the transition elements and rare earth elements. Then, a chelator complexing agent (e.g. pyridine-2,6 dicarboxylic acid or an oxalate) flows through the concentrator column to remove the transition elements and rare earth elements.

REFERENCES:
Strelow, F. W. E. "Quantitative separation of lanthanides and scandium from barium, strontium and other elements by cation-exchange chromatography in nitric acid", Anal. Chim. Acta., Nov. 1, 1980, pp. 249-254.
Liren, Chen et al. "Ion exchange chromatograph with coulometric detector for the determination of ionic substances", Proc. Sino-West Germ. Symp. Chromatography 1983, pp. 506-513.
Kingston, H. M., Barnes, I. L., Brady, T. J., Champ, M. A., and Rains, T. C., "Separation of Eight Transition Elements in Estuarine and Sea Water with Chelating Resin and Their Determination by Graphite Furnace Atomic Absorption Spectrometry," Anal. Chem., 50, 14 (1978).
Kingston, H. M., and Pella, P. A., "Preconcentration of Trace Metals in Environment and Biological Samples by Cation Exchange Filters for C-Ray Spectrometry," Anal. Chem. 53, 2 (1981).
Gunter Knapp, Jurt Muller, Martin Strunz and Wolfard Wegscheider, "Automation in element Pre-concentration with Chelating Ion Exchangers", Journal of Analytical Atomic Spectrometry, vol. 2, (1987).
Greenberg, R. R., and Kingston, H. M., "Simultaneous Determination of Twelve Trace Elements in Estuarine and Sea Water Using Pre-Irradation Chromatography," J. Radio. Anal. Chem., 71, 147 (1982).
Werefridus W. Van Berkel, Arent W. Overbosch, Gjalt Feenstra and Frans J. M. J. Maessent, "Enrichment of Artificial Sea Water. A Critical Examination of Chelex-100 for Group-wise Analyte Pre-Concentration and Matrix Separation", J. of Ana. Atomic Spectromety, vol. 3, pp. 249-257 (1988).
Ion-Exchange Chromatography (H. F. Walton, Editor, 1976).

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