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C30J_2010_lecture_6 - C30J Chemical Analysis II Analytical...

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C30J Chemical Analysis II Analytical Atomic Spectrometry Lecture 6 April 7, 2010
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Inductively Coupled Plasma (ICP) Spectrometry
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ICP- Atomic Emission Spectrometry Atomizer is the Inductively Coupled Plasma Sample introduction System usually same as for FAES and FAAS although Laser Ablation systems for Direct Solid Analysis are well developed Monochromator and Detector as previously discussed; solid state detectors are now common Sample Introduction System Atomizer Wavelength Selector Detector
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A plasma is an electrically conducting gaseous mixture containing a significant concentrations of cations and electrons Several types are used in Analytical Chemistry including: DC Plasmas Microwave plasmas (10 10 – 10 12 Hz) Inductively Coupled Plasmas (10 7 – 10 10 Hz) What is a Plasma?
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ICP History First studied as a phenomenon in the 1960s (Fassel and Greenfield) but the first commercial instrument appeared on the market in around 1975 ICP-AES put the brakes on the rapid expansion of Atomic Absorption as the technique of choice for elemental analysis
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Process of ICP Formation Radiofrequency Generator Argon Quartz Torch Seed electrons Sample
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C30J_2010_lecture_6 - C30J Chemical Analysis II Analytical...

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