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In this short communication the author relates some preliminary studies about the application of 2,2' - dipyridy ketoxime, as reagent for a spectrophotometric determination of cobalt. Problems that appear in the application of the HOLLAND & BOZOC (1968) technics for plant analysis, were discussed.

A 2,2' - dipiridil cetoxima, como reagente para determinação espectrofotométrica do cobalto