Electrodeposition and stripping process by long optical pathlength potential-step transmission chronoabsorptometry.
Based on the transmittance-averaged rather than absorbance-averaged model of long optical pathlength transmission spectroelectrochemistry, a reasonable theoretical model for potential-step electrodeposition and stripping process has been developed. It can accurately predict the stripping-chronoabsorptometric waveform with a peak absorbance with respect to the time rather than that with no peak but only a theoretical maximum absorbance at the initial stage of the stripping process. Cu(II) in NH(3) . H(2)ONH(4)Cl supporting electrolyte is utilized to verify the theory. With this anodic stripping spectroelectrochemical method, a detection limit of ca 0.01mM without stirring or ca 0.002mM under stirring during deposition can be achieved. An application in the analysis of copper in practical samples is presented.
Xie
Q
Q
Department of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P.R. China.
Cheng
X
X
Wei
W
W
Nie
L
L
Yao
S
S