Fluorimetric determination of selenium in some marine materials after digestion with nitric and perchloric acids and co-precipitation of selenium with lanthanum hydroxide.


A modified spectrofluorimetric method for the determination of selenium in some marine tissues is described. Selenium is isolated from potentially interfering elements by co-precipitation, then a piazselenol is formed between selenium and 2.3-diaminonaphthalene at pH 1.0 and extracted into cyclohexane. The selenium is determined fluorometrically (lambda(ex… (More)


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