# Practical Data Analysis in Chemistry

The majority of modern instruments are computerised and provide incredible amounts of data. Methods that take advantage of the flood of data are now available; importantly they do not emulate 'graph paper analyses' on the computer. Modern computational methods are able to give us insights into data, but analysis or data fitting in chemistry requires the quantitative understanding of chemical processes. The results of this analysis allows the modelling and prediction of processes under new conditions, therefore saving on extensive experimentation. Practical Data Analysis in Chemistry exemplifies every aspect of theory applicable to data analysis using a short program in a Matlab or Excel spreadsheet, enabling the reader to study the programs, play with them and observe what happens. Suitable data are generated for each example in short routines, this ensuring a clear understanding of the data structure. Chapter 2 includes a brief introduction to matrix algebra and its implementation in Matlab and Excel while Chapter 3 covers the theory required for the modelling of chemical processes. This is followed by an introduction to linear and non-linear least-squares fitting, each demonstrated with typical applications. Finally Chapter 5 comprises a collection of several methods for model-free data analyses.

Audience
For post-graduate students, research and industrial chemists with sufficient interest in data analysis to warrant the development of their own software

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Published: July 2007

Imprint: Elsevier

ISBN: 978-0-444-53054-7

## Contents

• 1. Introduction 2. Matrix Algebra 2.1 Matrices, Vectors, Scalars
2.2 Solving Systems of Linear Equations 3. Physical/Chemical Models 3.1 Beer-Lambert's Law
3.2 Chromatography / Gaussian Curves
3.3 Titrations, Equilibria, the Law of Mass Action
3.4 Kinetics, Mechanisms, Rate Laws 4. Model-based Analyses 4.1 Background to Least-Squares Methods
4.2 Linear Regression
4.3 Non-Linear Regression
4.4 General Optimisation 5. Model-Free Analyses 5.1 Factor Analysis, FA
5.2 Target Factor Analyses
5.3 Evolving Factor Analyses
5.4 Alternating Least-Squares
5.5 Resolving Factor Analysis, RFA
5.6 Principle Component Regression and Partial Least Squares, PCR and PLS