Radiant energy – Ionic separation or analysis – With sample supply means
Patent
1981-07-13
1983-10-04
Smith, Alfred E.
Radiant energy
Ionic separation or analysis
With sample supply means
H01J 4904
Patent
active
044081251
ABSTRACT:
A modular pyrolysis inlet apparatus and method for pyrolyzing compounds preparatory to an analysis thereof by a mass spectrometer. The pyrolysis inlet includes a telescopic insertion probe having a ferromagnetic wire bearing the sample to be analyzed, and a reaction chamber mounted to the insertion probe so as to encompass the wire and sample. The insertion probe/reaction chamber assembly is inserted into the pyrolysis inlet apparatus and the voids surrounding the assembly are evacuated. The sample is cooled at a first position within the reaction chamber while a heating mantle preheats the reaction chamber at a second position therein. The telescopic insertion probe/reaction chamber assembly is then inserted further into the pyrolysis inlet, moving the sample to the second heated position within the reaction chamber. At the second position, a high frequency coil is activated to energize and heat the wire, and rapidly pyrolyze the sample thereon. The volatile pyrolysis products escape from the reaction chamber and enter a modular expansion chamber. The volatile pyrolysis products are delayed for a moment within the expansion chamber and then introduced directly into a mass spectrometer for subsequent analysis.
REFERENCES:
"Versatile Mass Spectrometric Inlet System for High Boiling Liquid Samples and for Thermoanalysis of Nonvolatile Materials"; Shen et al.; Analytical Chemistry, vol. 48, No. 14, pp. 2291-2292, Dec. 1976.
"Pyrolysis Mass Spectrometry; Prospects for Interlaboratory Standardization," H. L. C. Meuzelaar, Proc. 26th ASMS Conf. of Mass Spectrom. All. Topics, St. Louis, pp. 29-41, (1978).
"A Technique for Fast and Reproduceable Fingerprinting of Bacteria by Pyrolysis Mass Spectrometry"; Meuzelaar, H. L. C. et al.; Anal. Chem., 45, 587-590, (1973).
"Beitrag zur Curie-punkt-pyrolyse/massenspektrometrie Organischer Verbindungen," Oertli, C. U., Ph.D. Thesis, Eidgenossischen Technischen Hochschule, Zurich, Switzerland, (1974).
"Recent Advances in Pyrolysis Mass Spectrometry of Complex Biological Materials," H. L. C. Meuzelaar et al., Biomed. Mass Spectrom, 1, 312-319, (1974).
"Automated Pyrolysis Mass Spectrometry; Application to the Differentiation of Microorganisms," H. L. C. Meuzelaar et al., Advances in Mass Spectrometry, vol. 7B, ed. N. R. Daly, Heyden and Son, London, pp. 1452-1456, (1976).
Berman Jack I.
Hulse Dale E.
Jensen Allen R.
Smith Alfred E.
University of Utah
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