I. M. Issa, A. El-samahy, R. M. Issa
Jul 1, 1972
Citations
0
Influential Citations
7
Citations
Journal
Electrochimica Acta
Abstract
Abstract The polarographic behaviour of dichloro-, dibromo- and di-iodofluorescein has been studied in buffer solutions (pH 4–12) at the dme. The reduction of dichloro- and dibromo-derivatives involves the uptake of two electrons whereby the furane ring is reduced. At low pH (⩽7) a small wave appears, which is attributed to the partial reduction of the pyrone ring. In the case of diiodofluorescein, four electrons are consumed, corresponding to the reduction of both furane and pyrone rings at all pHs. The nature of the reduction waves is discussed.