Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) is a technique that uses high-temperature plasma to produce free atoms and ions of a vaporized sample, for optical spectroscopic analysis of elements. Ex perts at Infinita Lab, USA, laboratory network, cater all your routine and specific test needs basing on the ICP-OES technique.... Read More
Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) is a technique that uses high-temperature plasma, to produce free atoms and ions of a vaporized sample, for elemental analysis by Optical Emission Spectroscopy (OES). The plasma generator is an inductively coupled (ICP) type, comprising concentric quartz tubes surrounded by an induction coil. Argon gas is commonly used, being converted to plasma by an intense electromagnetic field produced by the induction coil. Analyte samples are prepared as solutions or colloidal suspensions in liquid and introduced into the plasma in aerosol form, using a nebulizer. At high plasma temperatures, atoms are excited to higher energy levels and upon their return to the ground state, their optical emissions (photons) exhibit characteristic wavelengths, depending on the element. The intensity of emissions depends on the concentration of the excited atoms. These characteristic wavelengths are separated and measured by an optical spectrometer When calibrated against standards, quantitative estimates of elemental compositions can be obtained.
This technique is also referred to as inductively coupled plasma atomic emission spectroscopy (ICP-AES). ICP-OES is suitable for almost every element, excluding halogens and inert gases, and are especially useful for refractory elements, such as Silicon, Aluminium, Barium, that are difficult to analyze by flame atomic absorption spectroscopy (FAAS).
Common uses of ICP-OES
Advantages of ICP-OES
Limitations of ICP-OES
Industrial Applications of ICP-OES
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In ICP-MS, the mass of an atom is measured by mass spectrometry. In contrast, in ICP-OES, results are obtained by measuring the excited atoms and ions at the characteristic wavelength for the specimen being measured.
Advantages of Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES)
o Short analysis time
o Very low detection limit (0.0005-1.0ppb)
o Dynamic measuring range of over several orders of magnitude
o Able to measure multiple elements (up to 70) in a single analysis
o Able to detect the composition of the isotopes in complex geological and environmental samples
o Polyatomic isobaric interference signals can be eliminated using pressurized collision cells and reaction chambers
o Able to act as a selective detector in hyphenated techniques
Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) is suitable for almost every element, excluding halogens and inert gases, and are especially useful for refractory elements, such as silicon, aluminium, barium, that are difficult to analyze by Flame Atomic Absorption Spectroscopy (FAAS).
In the food industry, Inductively coupled plasma–optical emission spectroscopy (ICP-OES) as a quality control method. It analyses food samples for specified elements, adulterants and other impurities.
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