Chelating Ion Exchange Resins and X-Ray Fluorescence
1973; International Centre for Diffraction Data; Volume: 17; Linguagem: Inglês
10.1154/s0376030800005358
ISSN2631-3626
Autores Tópico(s)Radioactive element chemistry and processing
ResumoAbstract Functional groups which form chelate compounds with metal ions have long been of analytical usefulness. Such compounds have served as titrants, precipitating reagents, extractants, and as ionogenic groups on ion exchange resins. These ion exchange resins often have high distribution coefficients which enable the quantitative extraction of metal ions from solution in a single batch treatment with the resin. This report describes the application of chelating resins to sampling and determination of certain trace metals using x-ray fluorescence. Two commercial resins will be discussed. Chelex- 100 (Bio Rad) is a resin containing iminodiacetic acid functional groups and has chelation chemistry quite similar to EDTA. NMRR (Srafion) is a resin containing a functional site selective for gold, platinum metals, mercuric ions and methyl mercury.
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