![]() What is AES (Atomic Emission Spectroscopy)? This is the phenomena of absorption, and the extent of absorption is directly proportional to the amount of atoms present, in other words, the concentration. The electrons in the atoms then absorb this energy and excites into a higher energy level. In other words, it is a single coloured light, in contrast to normal white light. And monochromatic light is a light which is especially adjusted to a particular wavelength. Each type of element has a unique wavelength that it absorbs. The atoms are then bombarded with monochromatic light matching its wavelength of absorption. These instruments are commonly known as ‘ spectrophotometers‘. There are several ways of achieving atomization depending on the type of instrument used. The material under detection is first being atomized in the atomization chamber of the instrument. The chemical principle of absorption is as follows. Furthermore, according to the Beer-Lambert Law, it is a linear relationship that exists between the atomic absorption and the concentration of the species. The calculations are made according to the Beer-Lambert Law and is used here to get the relationship between atomic absorption and the concentration of the species. In this technique, the concentration is determined by a calibration method where the absorption measurement for known quantity of the same compound has been previously recorded. AAS employs the principle of absorption of light by the atoms. What is AAS (Atomic Absorption Spectroscopy)?ĪAS or Atomic Absorption Spectroscopy is one of the most common spectral techniques used in analytical chemistry today to determine the concentration of a chemical species accurately. AAS and AES differ in their operating principle where AAS employs the method of absorption of light by the atoms and, in AES, the light emitted by the atoms is what is taken into consideration. AAS stands for ‘ Atomic Absorption Spectroscopy‘ and AES stands ‘ Atomic Emission Spectroscopy.’ Both of these are spectro-analytical methods used in Chemistry in order to quantify the amount of a chemical species in other words, to measure the concentration of a specific chemical species. Difference between AAS and AES stems from their operating principles.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |