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

Quimica nova

May, Gyda Marie¹  Coscione, Aline Renée¹  Andrade, João Carlos de¹ 

[1] Universidade Estadual de Campinas, Campinas

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

【 授权许可】

CC BY