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Wet Chemical Analysis

Wet Chemical Analysis

Inductively coupled plasma atomic emission spectroscopy (ICP-AES), is an analytical technique used for the detection of chemical elements. It is a type of atomic emission spectroscopy that uses the inductively coupled plasma to produce excited atoms and ions that emit electromagnetic radiation at wavelengths characteristic of a particular element. It is a flame technique with a flame temperature up to 10,000 K. The intensity of this emission is indicative of the concentration of the element within the sample.

The ICP-AES is composed of two parts: the ICP and the optical spectrometer. The ICP torch consists of concentric quartz glass tubes. A radio frequency (RF) generator surrounds part of this quartz torch. Argon gas is used to create the plasma.

When the torch is turned on, an intense electromagnetic field is created within the coil by the high-power radio frequency signal flowing in the coil. This RF signal is created by the RF generator which is, effectively, a high-power radio transmitter driving the "work coil" the same way a typical radio transmitter drives a transmitting antenna. The argon gas flowing through the torch is ignited creating a brief discharge arc through the argon flow to initiate the ionization process. 

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