What is the difference between aes and aas

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Actions Shares. No notes for slide. Instruments Consists of: 1. Nebulizer 2. Burner 3. Monochromator 4. Detector 5. Sample Introduction a. Solid Samples - Sample atomized by electrothermal atomization a and carried into the plasma by a flow of argon gas. Temperature is two to three times higher than in a flame or furnace, which results in higher atomization and excitation efficiencies.

There is little chemical interference. Atomization in the inert argon atmosphere minimizes oxidation of the analyte. Short optical path length minimizes the probability of self-absorption by argon atoms in the plasma. Linear calibration curves can cover up to five orders of magnitude. The absorption is defined by the electronic transition for a given element and is specific for a given element.

The concentration is proportional to the absorbed radiation. A rapid relaxation is accompanied by emission of UV or visible radiation is used to identify the element. The intensity of the emitted photon is proportional to element concentration.

Total views 13, On Slideshare 0. The atoms are then bombarded with monochromatic light matching its wavelength of absorption. Each type of element has a unique wavelength that it absorbs. And monochromatic light is a light which is especially adjusted to a particular wavelength. In other words, it is a single coloured light, in contrast to normal white light.

The electrons in the atoms then absorb this energy and excites into a higher energy level. 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. Hollow Cathode Lamp 2. Atomizer 3. Species 4. Monochromator 5. Light Sensitive Detector 6. Amplifier 7. Signal Processor. This is also an analytical chemical method used to measure the quantity of a chemical substance. However, the underlying chemical principle, in this case, is slightly different to what is used in Atomic Absorption Spectroscopy.

Here, the operating principle of the light emitted by the atoms is taken into consideration. A flame is generally used as the light source and, as mentioned above, the light emitted from the flame can be fine-tuned depending on the element under investigation.

The chemical substance has to be atomized first, and this process happens through the heat energy provided by the flame.