Precise Fluor ometric Micro determination of Selenium in Agricultural Materials

Abstract

A precise, accurate, and comparatively rapid fluorometric method for the determination of selenium in the nanogram range is described and results are presented for Youden's uniformity and ruggedness tests. The sample is digested in a nitric-sulfuricperchloric acid mixture, potential interferences are masked with disodium EDTA, and selenium is complexed with freshly-prepared 2,3-diaminonaphthalene solution and estimated fluorometrically after extraction into cyclohexane. On the basis of its performance, collaborative study of the method is recommended