Analytical Pyrolysis: Techniques and Applications by Kent J. Voorhees

By Kent J. Voorhees

1984 (this quantity is the results of lectures awarded on the 5th overseas Symposium on Analytical Pyrolysis, held at Vail, Colorado), hardcover variation, Butterworths, London, U.K. Hardcover identify, 486 pages

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Res. 1979, 12, 359-65. Beckey, H. , Int. J. Mass Spectrom. Ion Phys. 1969, _2, 500-503. Mcfariane, R. ; McNeal, C. ; Hunt, J. , Adv. Mass Spectrom. 1980, 8A, 349-54. , Appi· Phys. 1976, _U, 35-39. ; Bordoli, R. ; Sedgwick, R. ; Tyler, A. , J. Chem. Soc. Chem. Comm. 1981, 325-27. Honig, R. ; Woolston, J. , Appi. Phys. Letters 1963, 2_, 138. Conzemius, R. ; Capellen, J. , Int. J. Mass Spectrom. Ion Phys. 1980, _34-, 197-271. , Israel J. Chem. 1978, 17, 181-84. 40 9. 10. 11· 12. 13. 14. 15. 16. 17.

159 80h OH z UJ »- z 60 ^ / N02 131 UJ > Ü 40 _J UJ oc 20 115 140 jji120 100 177 123 140 160 180 ' 200 ' 220 ' 240 ' 260 ' 200 ' 300 ' 320 ' 340 m/e Figure 2. Mass Spectrum of p-nitrophenyl glucuronide obtained 90s after probe insertion. Reprinted (with permission) from Ref. 6. 45 ture the activation energy for decomposition is in­ deed lower than the energy needed to free the intact molecule from the substrate. 3). 0 j CK? u t O 5 Figure 3. Relative i n t e n s i t i e s of m/e 363 and m/e 235 ions from TRH p l o t t e d as a function of 1/T.

They are, of course, much less intense. The decomposition reac­ tions described above continue to be the major pro49 cess, but produce neutral species which are not ob­ served with the electron beam turned o f f . Thus addi­ t i o n a l reactions must be considered. Molecular c a t i o n s , R*N , are quite s t a b l e . The bonding orbi t a l s of the nitrogen atom are f i l l e d , and unlike radical i o n s , the quaternary ammonium ion can­ not e a s i l y recombine w i t h an electron to produce a neutral species.

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