INTRO AND ADVANTAGE SLIDES.pptx - INTRODUCTION • Used as standard method for the metal analysis • In atomic emission small part of sample is

INTRO AND ADVANTAGE SLIDES.pptx - INTRODUCTION • Used as...

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INTRODUCTION Used as standard method for the metal analysis In atomic emission small part of sample is vaporized forms free atom that attain energy form excitation source results in transition from lower to higher energy state on returning back emit a photon of radiation
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Ancient : atomic emission was only based on flame,arc or spark excitation sources Modern era : advancement is made by the introduction of non combustion plasma sources Consist of discrete irregularly spaced lines Spectra obtained from plasma,arc or
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PRINCIPLE OF ATOMIC EMISSION SPECTROSCOPY AND SCHEMATIC DIAGRAM OF INSTRUMENTATION
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ADVANTAGES OF AES
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Unformatted text preview: 1 . Lower interelement interference because of higher temperature 2. Emission spectra are obtained under a single set of excitation conditions and several elements can be recorded simultaneously. 3. Multielement can be analysed from very small sample. 4. Low concentration refractory compounds can be determined 5. Nonmetals can also be determined by plasma sources. 6. Very high concentration range ( linear range) for plasma sources. DISADVANTAGE OF AES More expensive equipments needed Procedures are somewhat complicated that adsorption meth more time consuming ) More operating cost than...
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  • Fall '18
  • Dr Mazlina Musa

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