Analytical and applied chemistry: A compilation

Analytical chemistry and chemical processes and applied chemistry are presented. The reporting source is given for the dissemination of information

Countercurrent chromatography in analytical chemistry (IUPAC technical report)

© 2009 IUPACCountercurrent chromatography (CCC) is a generic term covering all forms of liquid-liquid chromatography that use a support-free liquid stationary phase held in place by a simple centrifugal or complex centrifugal force field. Biphasic liquid systems are used with one liquid phase being the stationary phase and the other being the mobile phase. Although initiated almost 30 years ago, CCC lacked reliable columns. This is changing now, and the newly designed centrifuges appearing on the market make excellent CCC columns. This review focuses on the advantages of a liquid stationary phase and addresses the chromatographic theory of CCC. The main difference with classical liquid chromatography (LC) is the variable volume of the stationary phase. There are mainly two different ways to obtain a liquid stationary phase using centrifugal forces, the hydrostatic way and the hydrodynamic way. These two kinds of CCC columns are described and compared. The reported applications of CCC in analytical chemistry and comparison with other separation and enrichment methods show that the technique can be successfully used in the analysis of plants and other natural products, for the separation of biochemicals and pharmaceuticals, for the separation of alkaloids from medical herbs, in food analysis, etc. On the basis of the studies of the last two decades, recommendations are also given for the application of CCC in trace inorganic analysis and in radioanalytical chemistry

Analytical Chemistry

Exam paper for the first semester (Department of Applied Physics and Engineering Mathematics, National Diploma: Analytical Chemistry

Modern Analytical Chemistry

251-25

Analytical Chemistry 2.0

1. Introduction to Analytical Chemistry2. Basic Tools of Analytical Chemistry3. The Vocabulary of Analytical Chemistry4. Evaluating Analytical Data5. Standardizing Analytical Methods6. Equilibrium Chemistry7. Obtaining and Preparing Samples for Analysis8. Gravimetric Methods9. Titrimetric Methods10. Spectrophotometric Methods11. Electrochemical Methods12. Chromatographic and Electrophoretic Methods13. Kinetic Methods14. Developing a Standard Method15. Quality AssuranceAnalytical chemistry is more than a collection of analytical methods and an understanding of equilibrium chemistry; it is an approach to solving chemical problems. Although equilibrium chemistry and analytical methods are important, their coverage should not come at the expense of other equally important topics. The introductory course in analytical chemistry is the ideal place in the undergraduate chemistry curriculum for exploring topics such as experimental design, sampling, calibration strategies, standardization, optimization, statistics, and the validation of experimental results. Analytical methods come and go, but best practices for designing and validating analytical methods are universal. Because chemistry is an experimental science it is essential that all chemistry students understand the importance of making good measurements

Els Fonaments canviants de la química analítica

The features of the physico-chemical background of analytical chemistry, as it was viewed during the first half of this century, is first described. The impact of the massive introduction of instrumentation and separation techniques is discussed, and the start of a change of analytical chemistry in the direction to become a science of measurement is signaled. The "third revolution" is defined as derived not only from automation of instruments, procedures and laboratories and from computerization, but also from the use of chemometrics, and from the increasing importance of the socio-chemical problems in which analytical scientists are involved. Chemometrics and physical chemistry now build up the unifying background of analytical chemistry, which was so much diversified by instrumentation into almost independent subdisciplines. 33 references