... & Krishna Nand Singh* Department of Applied Chemistry, Institute of Technology, Banaras Hindu University, Varanasi 221005, India Received 21 ... 582 INDIAN J CHEM, SEC ... 7 Fridovich I, Science, 201, 1978, 875 8 Sawyer DT & Robert (Jr) JL, J Electroanal Chern, 12, 1966, 90 9 ...