Spectrophotometric determination of some metal ions using 3,4 - dihydroxy benzaldehyde - 1 - (3-chloro - 2 - quinoxalinyl) hydrazone and 3,4 - dihydroxy benzaldehyde thio semi carbazone in micellar media
Potable water quality in the vicinity of Champavathi river, Vizianagaram district, Andhra Pradesh
