Spectrophotometric determination of micro quantities of zinc in rocks

Geochimica et Cosmochimica Acta
By: , and 



A chemical method is presented for the determination of microgram amounts of zinc in rocks. Zinc is absorbed on anion-exchange resin from 1.2 M hydrochloric acid and eluted with 0.01 M hydrochloric acid. A diethyldithiocarbamate separation removes traces of interfering elements from the eluate. The zinc-diethyldithiocarbamate complex is extracted into chloroform at pH 8.5 and reextracted from other elements in the chloroform solution with 0.16 M hydrochloric acid and finally determined spectrophotometrically as the zincon complex at 621 mμ.

The coefficient of variation of the method determined from replicate determinations of zinc on 75 selected samples of basalt, ranging in zinc content from 0.004 to 0.018 per cent, was found to be 6.3 per cent and essentially constant in the range of zinc content studied. This method of analysis has been used extensively for a study of zinc in basalts reported by Rader, Swadley, Huffman and Lipp (companion paper, 1963).

Publication type Article
Publication Subtype Journal Article
Title Spectrophotometric determination of micro quantities of zinc in rocks
Series title Geochimica et Cosmochimica Acta
DOI 10.1016/0016-7037(63)90023-1
Volume 27
Issue 3
Year Published 1963
Language English
Publisher Elsevier
Description 7 p.
First page 209
Last page 215
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