Indirect simultaneous kinetic determination of semicarbazide and hydrazine in micellar media by H-point standard addition method.
H-point standard addition method (HPSAM) is suggested as a simple and selective method for the determination of semicarbazide and hydrazine. The reduction of Cu(2+) to Cu(+) by semicarbazide and hydrazine in the presence of neocuproine (Nc) and the subsequent complex formation between Cu(+) and Nc produced a sensitive spectrophotometric method for indirect determination of semicarbazide and hydrazine. The difference in the rate of reduction of Cu(2+) with semicarbazide and hydrazine in cationic micellar media is the basis of this method. Semicarbazide can be determined in the range of 0.5-3.75 mug ml(-1) with satisfactory accuracy and precision in the presence of excess hydrazine. The proposed method was successfully applied to the simultaneous determination of semicarbazide (0.5-3.75 mug ml(-1)) and hydrazine (0.5-5 mug ml(-1)) and also to the selective determination of semicarbazide in the presence of hydrazine in several synthetic mixtures containing different concentration ratios of semicarbazide and hydrazine.
Safavi
A
A
Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran.
Abdollahi
H
H
Sedaghatpour
F
F
Hormozi Nezhad
M R
MR