Preface

The book " Macro to Nano Spectroscopy" has been written to fulfill a need for an upto-date text on spectroscopy. It has vast of applications, including study of Macro to Nanomaterial, remote sensing in terrestrial and planetary atmospheres, fundamental laboratory spectroscopic studies, industrial process monitoring, and pollution regulatory studies. The importance of spectroscopy in the physical and chemical processes going on in planets, stars, comets and the interstellar medium has continued to grow as a result of the use of satellites and the building of radio telescopes for the microwave and millimeter wave regions.

This book has wide variety of topics in spectroscopy including spectrophotometric apparatus and techniques. Topics covered absorption, emissions, scattering, causes of non-linearity, monochromators, detectors, photocells, photomultipliers, differential spectrophotometry, spectrophotometric titration, single beam, dual and multi wave length spectrophotometry, and diode array spectrophotometers.

The emphasis of this book serve both theorist and experimentalist. The authors present the models and concepts needed by theorists to understand the spectroscopic language spoken by molecules as translated by experimentalists and the tools and terminology needed by experimentalists to communicate with both molecules and theorists.

We (INTECH Publisher and Editor) owe our gratitude to the experts who gave much of their time and expertise in determining the scientic merit of the articles submitted to this special book.

Coppin State University professors Dr. Moses Wekesa, Dr. Hany F. Sobhi and Dr. Mintesnot Jiru helped greatly with the review of some chapters of this book and I would like to thank them very much for their critical work.

> **Jamal Uddin**  Associate Professor of Natural Sciences Director of Nanotech Center Coppin State University, Baltimore, Maryland, USA

**Section 1** 

**Atomic Absorption Spectroscopy** 
