Author/Authors :
Sreedhar، Neelam Yugandhar نويسنده Department of Chemistry, Electroanalytical lab, S.V.University, Tirupati, A.P., India , , Prasad، Puthalapattu Reddy نويسنده Department of Chemistry, Electroanalytical lab, S.V.University, Tirupati, A.P., India , , Reddy، Sarvareddy Rajasekar نويسنده Department of Chemistry, Electroanalytical lab, S.V.University, Tirupati, A.P., India ,
Abstract :
Abstract- A differential pulse anodic stripping voltammetric method was based on the
18 accumulation of Mo(VI) complex with phenylpiperazine dithiocarbamate on a hanging
19 mercury drop electrode, followed by measurement of the current of the adsorbed
20 complex. The effects of various parameters, such as reagent concentration, effect of pH
21 of the medium, the accumulation potential, the accumulation time and the scan rate were
22 investigated. Under the optimum conditions, a linear calibration graph was obtained in
23 the concentration range of 0.01 to100 ?g/mL with a correlation coefficient of 0.9994
24 and detection limit of 0.009 ?g/mL. The effects of interference ions have been studied
25 and it was found that the method is free from interferences of some common
26 cations. The proposed method was applied for the determination of Mo(VI) in natural
27 water and various food samples and the results showed good agreement with reported
28 methods and the recoveries were in the range of 99.92 to 99.99 and 99.20 to 102.0 %
29 respectively. The relative standard deviation for eight successive replicate analyses of
30 Mo(VI) were 2.3% and 1.2%.
