Characterization of Polymers by Direct Pyrolysis/Chemical Ionization Mass Spectrometry
作者： S. C. Israel , W. C. Yang , M. Bechard
DOI: 10.1080/00222338508056636
关键词: Sector mass spectrometer 、 Chemical ionization 、 Pyrolysis 、 Mass spectrometry 、 Ion source 、 Ion 、 Analytical chemistry 、 Isobutane 、 Chemistry 、 Mass spectrum
摘要: Abstract The characterization of polymers by pyrolysis directly in the ion source a double focusing magnetic sector mass spectrometer, operating chemical ionization mode, is described. Pyrolysis achieved two different probe techniques. A low temperature, slow heating rate direct insertion (DIP) used at 400°C, and specifically constructed high fast rate, temperature (HTP) 1000°C. This capable achieving temperatures 1200°C controlled rates up to 20,000°C/s. spectrometric analysis products was under (CI) conditions utilizing methane, isobutane, ammonia as reagent gases. Under CI molecular ions formed spectrometer show little tendency fragment. pyrograms are very simple, with each peak spectra ascribable particular component product mixture. results pro...
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