This paper describes fundamentals and applications of multivariate statistical techniques for
the optimization of chromatographic systems. The surface response methodologies: central …

This manuscript aims to show the basic concepts and practical application of Principal
Component Analysis (PCA) as a tutorial, using Matlab or Octave computing environment for …

Background This study evaluated the effect of the solvent on the extraction of antioxidant
compounds from black mulberry (Morus nigra), blackberry (Rubus ulmifolius) and strawberry …

A software for multivariate analysis was developed in order to provide a free computational
tool with user-friendly graphical interface for researchers, professors and students with …

Xanthenes form to an important class of dyes which are widely used. Most of them present
three acid–base groups: two phenolic sites and one carboxylic site. Therefore, the pKa …

In general, chemical problems are composed by complex systems. There are several chemi‐
-cal processes that can be described by different mathematical functions (linear, quadratic …

This tutorial intends to show to the readers a step-by-step guide to perform a factorial design
in their experiments. The examples used here cover most of doubts and questions related to …

RESUMO O cerne do presente trabalho consistiu em aplicar ferramentas de análise
exploratória multivariada objetivando avaliar o número de estações de monitoramento de …

Phenolic compounds have a strong influence on the quality and authenticity of grapes, and
they have been the main objective of several studies due to its importance on the structure …

The assessment of soil quality improvement provided by biochars is complex and rarely
examined. In this work, soil quality indices (SQIs) were produced to evaluate coffee industry …