Statistical modeling of mixtures: a tutorial experiment using anodic stripping voltammetry

Química Nova

May, Gyda Marie¹  Coscione, Aline Renée¹  Andrade, João Carlos de¹  Universidade Estadual de Campinas, Campinas¹ 

关键词: experimental design of mixtures;    voltammetry;    nickel.;   

DOI  :  10.1590/S0100-40422005000600029

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

This work illustrates the modeling procedure for a solvent mixture using the simplex- centroid approach. The selected experiment was the optimization of the peak current observed in the direct determination of nickel by anodic stripping voltammetry (ASV) in a solvent mixture composed of N,N-dimethylformamide, ethanol and water. The text is presented in a tutorial way, showing in detail the several steps which must be followed in such a process. Since not all possible mixtures lead to a measurable instrumental response, pseudocomponents had to be used to rescale the experimental design. This also allows to show how to apply this tool, usually troublesome for non-specialists in mixture modeling procedures.

【 授权许可】

Unknown