System for detecting transition and rare earth elements in a...

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

C - Chemistry, Metallurgy

22

B

53/162, 150/19,

C22B 3/02 (2006.01) C22B 3/44 (2006.01) G01N 1/34 (2006.01) G01N 31/22 (2006.01) G01N 33/18 (2006.01) G01N 33/20 (2006.01) G01N 1/40 (2006.01)

Patent

CA 2011295

61051-2372 ABSTRACT OF THE DISCLOSURE In many environmental and biological samples there are present large amounts of alkali metal and alkaline earth metal, as compared to the amounts of transition elements and rare earth elements. With these samples conventional ion exchange concentration methods are not selective enough for determination of trace and ultra-trace amounts of transition elements and rare earth elements. The invention provides a method and apparatus for detecting selected trace transition elements or rare earth elements in samples containing alkali metals or alkaline earth metals. The sample is passed through chelator means under conditions which retain all the trace element but only part of the alkali. Remaining alkali is stripped by means of a first eluant while trace elements are retained. Thereafter the trace elements are stripped with a second eluant, concentrated, stripped from the concentator by means of a third eluant and passed to a detector.

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