Mass Spectrometric Methods
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Mass spectrometry is commonly known as a method for determination of stable isotopes, detection of impurities in gases, quantitative analysis of hydrocarbons and atomic and molecular weight determinations. Very recently the method has been used for identification and, more important, for the deteraiination of the structure of organic compounds. It is the latter aspect of mass spectrometry this chapter will deal with, particularly since the extreme sensitivity of this tool adds to its value in the investigation of minute amounts of material, an important consideration where compounds have to be isolated laboriously from natural sources like plants. The determination of stable isotopes in gaseous degradation products was discussed in an earlier volume of this series and need not be considered here, with the exception of the measurement of stable isotopes in the intact molecule. The main emphasis will be placed on the qualitative aspects of mass spectrometry, its scope and limitations, and the interpretation of spectra. The principle of quantitative analysis will also be illustrated.
KeywordsEthyl Ester Heavy Isotope Mass Spectrometric Method Inlet System Lithium Aluminum Hydride
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