Actas de congresos
Split-plot Designs And Normal Probability Graphs For The Optimization Of Chemical Systems
Registro en:
Analytica Chimica Acta. , v. 544, n. 1-2 SPEC. ISS., p. 206 - 212, 2005.
32670
10.1016/j.aca.2005.01.021
2-s2.0-20444436000
Autor
Bortoloti J.A.
Borges C.N.
Bruns R.E.
Institución
Resumen
An approximate procedure based on normal probability graphs for selecting significant parameters of models calculated from the results of split-plot designs is proposed. Its application can result in a substantial reduction in the number of experiments that need to be performed. The method is applied to three split-plot design results for real data reported in the literature: (1) three plasticizer mixture components with different extrusion rates and drying temperatures, (2) three fish pattie ingredients at different cooking and frying temperature and times and (3) Cr(VI) catalytic determinations employing three reagents of varying concentrations and three solvent components of varying proportions. Approximate models determined from the proposed procedure are compared with those determined using complete split-plot ANOVA analyses. The robustness of the procedure is tested for one of the split-plot design results using replication, main-plot error and sub-plot error variance estimates that change according to a 23 factorial design. © 2005 Elsevier B.V. All rights reserved. 544 1-2 SPEC. ISS. 206 212 Cornell, J.A., (1988) J. Qual. Technol., 20, p. 2 Cornell, J.A., (1971) J. Am. Stat. Assoc., 66, p. 42 Montgomery, D.C., (1991) Design and Analysis of Experiments, , Wiley New York Wooding, W.M., (1973) J. Qual. Technol., 5, p. 16 Reis, C., De Andrade, J.C., Bruns, R.E., Moran, R.C.C.P., (1998) Anal. Chim. Acta, 369, p. 269 Bortoloti, J.A., Bruns, R.E., De Andrade, J.C., Vieira, R.K., (2004) Chemom. Intell. Lab. Syst., 70, p. 113 Cornell, J.A., Gorman, J.W., (1984) J. Qual. Technol., 16, p. 20 Box, G.E.P., Hunter, W.G., Hunter, J.S., (1978) Statistics for Experimenters, , Wiley New York Cornell, J.A., (1990) Experiments with Mixtures: Designs, Models and the Analysis of Mixture Data, , 2nd ed. Wiley New York Neto, B.B., Scarminio, I.S., Bruns, R.E., (2002) Como Fazer Experimentos, , 2nd ed. Editora da Unicamp Campinas, SP, Brazil Statistica for Windows, Version 6.0, , Statsoft Inc., Tulsa, OK, USA Box, G., Jones, S., (2000) Qual. Eng., 13, p. 127