Analytical technique

Analytical technique is a method that is used to determine a chemical or physical property of a chemical substance, chemical element, or mixture.[1] There are a wide variety of techniques used for analysis, from simple weighing to advanced techniques using highly specialized instrumentation.

Classical methods of analysis

Classical Methods of analysis involves basic analytical methods that are widely used in laboratories. Gravimetric analysis measures the weight of the sample. Titrimetry is the technique used to determine the concentration of the analyte.[2]

Spectrochemical analysis

Spectrometer are able to determine chemical composition through its measure of spectrums. The common spectrometer used in analytical chemistry is Mass spectrometry. In mass spectrometer, a small amount sample is ionized and converted to gaseous ions, where they are separated and analyzed according to their mass-to-charge ratios.[2]

Electroanalytical analysis

Electroanalytical methods utilize the potential or current of a electrochemical cell. The three main sections of this type of analysis are potentiometry, coulometry and voltammetry. Potentiometry measures the potential of the cell, coulometry measures the current of the cell, and voltammetry measures the change in current when cell potential changes.[3][4]

Chromatography

Chromatography, in which the analyte is separated from the rest of the sample so that it may be measured without interference from other compounds.[2] There are different types of chromatography that differs from the media they use to separate the analyte and the sample. In Thin-layer chromatography the analyte mixture move up and separate along the coated sheet under volatile mobile phase. In Gas chromatography gas is used to separate the volatile analytes. For chromotography using liquid as mobile phase, a common method used is High-performance liquid chromatography.

See also

References
  1. "Analytical technique". Archived from the original on 2013-03-17. Retrieved 2013-01-17.
  2. Douglas A. Skoog; Stanley R. Crouch (2014). Fundamentals of analytical chemistry (Ninth ed.). Belmont, CA. ISBN 978-0-495-55828-6. OCLC 824171785.
  3. Skoog, Douglas A.; Donald M. West; F. James Holler (1996). Fundamentals of analytical chemistry (7th ed.). Fort Worth: Saunders College Pub. ISBN 0-03-005938-0. OCLC 33112372.
  4. Bard, Allen J.; Larry R. Faulkner (2001). Electrochemical methods : fundamentals and applications (Second ed.). Hoboken, NJ. ISBN 0-471-04372-9. OCLC 43859504.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.