A branch of chemistry that deals with the development and use of techniques for chemical measurement. These techniques are used in analysing the chemical composition of substances. Chemical analysis may be qualitative or quantitative. Qualitative analysis involves attempting to identify what materials are present in a sample. Answering the question: "What is it?". Quantitative analysis involves determining how much of a material is present in a sample. Answering the question: "How much is present?".
Modern analytical methods make it possible to identify hundreds of components in a single sample and to detect specific substances present in less than one part per million.
American Organization of Analytical Chemists International
AOAC INTERNATIONAL is a 120 year-old not-for-profit scientific association committed to worldwide confidence in analytical results. In fact, "worldwide confidence in analytical results" is AOAC's vision.
An AOAC community is a group of analytical scientists in a specific area who share AOAC's vision of worldwide confidence in analytical results and who are brought together by a leader or "champion" to do together what they cannot do alone. Representatives of a community include scientific experts from various government agencies, industry, trade associations, international organizations, and academia.
Analytical Chemistry Basics
The goal of this on-line course is to provide the user with an introduction to some of the fundamental concepts and methods of analytical chemistry. The topics are arranged in the order in which they are typically presented in an undergraduate analytical chemistry course. Many of the reference documents that you will read contain links to remedial material and related topics.
Basic Liquid Chromatography
Textbook on High Performance Liquid Chromatography (HPLC). A real hypertextbook on the web. Great for anyone wanting to learn the basics of LC techniques.
Interactive Computer Models for Analytical Chemistry Instruction
Interactive computer models and simulations of common analytical instruments and techniques are provided by Tom O'Haver, Department of Chemistry and Biochemistry, University of Maryland at College Park. They cover: spectroscopy instrumentation and methodology, molecular spectrometry, atomic spectrometry, and classical and electrochemical methods.
NMRShiftDB is a web database for organic structures and their nuclear magnetic resonance (nmr) spectra. It allows for spectrum prediction (currently only for carbon) as well as for searching spectra, structures and other properties. Last not least, it features peer-reviewed submission of datasets by its users. The implemented search algorithms can scan the database for example for the following items: substance name, formula, structure, substructures, chemical shifts, and a Hit List of best matches is generated.
Spectra Online is a fee - based spectral database service for the chemical research community. The spectra in the database are comprised of collections of public domain and other data generously submitted by various institutions and individuals. The database spans many different classes of compounds including drugs, common chemicals, polymers, petroleum products among others. It includes spectral data from many different instrument types such as FT-IR, UV-Vis, NIR, Raman, MS, NMR (13C, 1H and others), XRD and more.
The Spectroscopy Net
The Spectroscopy Net was created by Dr. Richard Payling in 1999. Its purpose is to promote knowledge about spectroscopic methods for chemical analysis and about spectroscopy in general.
It has been designed for both people looking for general information and specialists in the field. The Spectroscopy Net therefore contains an educational part with general information on spectroscopy and spectro-chemical methods for analysis, and detailed information of commonly used techniques as well as results of recent development.
What is Mass Spectrometry?
This website is from the American Society for Mass Spectrometry. It covers subjects such as uses of mass spectrometry, history of mass spectrometry, what a mass spectrometer is an example of a mass spectrum, how the analyzer and detector work and elemental mass spectroscopy.
See also: Tetrahedron Letters - procedures for the synthesis of organic compounds.