Sensitivity Enhancement of Differential Pulse Polarographic Technique by Simplex Optimization Method
Buabarn Poonperm, Waret Veerasai* and Prapin Wilairat* Author for corresponding; e-mail address: -
Volume: Vol.27 No.2 (DECEMBER 2000)
Opinion
DOI:
Received: 31 August 1998, Revised: -, Accepted: 29 October 1998, Published: -
Citation: Poonperm B., Veerasai W. and Wilairat P., Sensitivity Enhancement of Differential Pulse Polarographic Technique by Simplex Optimization Method, Chiang Mai Journal of Science, 2000; 27(2): 71-81.
Abstract
Simplex optimization method is used for optimization of the polarographic signal (Ip). This signal is very sensitive to a set of adjustable transient parameters of polarographic technique, such as tmeas, tpulse and tstep, which are defined as simplex parameters. The procedure for simplex optimization is illustrated by employing a triangular diagram of the normalized t-parameters. By this optimization method, the differential pulse polarographic current of a mixture of dioxovanadium (V)(VO2+) and oxovanadium (IV) (VO2+) cations in sulfuric acid was enhanced about 3 times, while maintaining good linearity of the calibration curve.