Pulse polarography of nitrosated GPC fractions of humic acids.
A pulse polarographic method for the analysis of humic acids fractionated by gel permeation chromatography is described. It is concluded that the pulse polarography of the nitroso-derivatives, already reported as an analytical method for the determination of humic acids, really gives responses due to the presence of iron in the samples. Atomic-absorption measurements confirm this conclusion quite unambiguously.
Lippolis
M T
MT
Istituto Chimico G. Ciamician, Università di Bologna, Via Selmi 2, Bologna 40126, Italy.
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