Development of a Novel Mass Spectrometric ... - Jacobs University

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Results and Discussion Scheme 5. Fragmentation scheme of (M-1) + of 5-α-cholestane at m/z 371 75
Results and Discussion 3.4.5 Tandem MS of Derivatised Compounds Furthermore, Tandem MS has been used to explore derivatised waste sample. In a separate experiment, silver triflate was added to the waste extract. Figure 3-44 shows the mass spectrum after addition of silver triflate. Isotope patterns indicating the presence of Ag were observed. This shows that the silver complexed to few components within the waste and the resultant masses dominated the waste spectra as shown in figure 3-44. The idea here was to employ Tandem MS to inquire about the structural identity of these new product ions. MS 2 spectrum of selected m/z 328 ion was acquired as shown in figure 3-45. The fragmentation shows the typical isotope pattern of the detached silver at m/z 107 and m/z 109 in figure 3-45. However the fragmentation spectrum didn’t provide additional knowledge about the structure of the compound that complexed with Ag. This leads to conclude that derivatisation with silver has led to enhance few compounds that may have been of low abundance within the waste extract. However derivatisation in this case doesn’t seem to aid in providing structural information about the compounds found in the waste sample. Intens. [%] 100 328.8 +MS 80 60 411.4 423.4 40 303.2 20 337.3 351.3 365.3 379.3 397.4 439.4 457.4 471.4 485.4 499.4 513.5 527.5 0 300 325 350 375 400 425 450 475 500 525m/z Figure 3-44 APCI mass spectrum in positive ion mode of waste sample derivatised with Agtriflate 76
Page 1 and 2:
Development of a Novel Mass Spectro
Page 3 and 4:
Declaration of Authorship I ,Nadim
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This work has been carried out unde
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Contents Contents Declaration of Au
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List of Figures List of Figures Fig
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List of Figures Figure 3-39 MS 2 fr
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List of Tables List of Tables Table
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Abbreviations Abbreviations APCI AP
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Abbreviations UV VGOs VOCs VRs ultr
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Introduction Analytical chemistry h
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Introduction 1.2 Presence and Fate
Page 23 and 24:
Introduction aliphatic hydrocarbons
Page 25 and 26:
Introduction Figure 1-1 Examples of
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Introduction Figure 1-2 Range of io
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Introduction fractions. 42 Another
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Introduction 1.3.5 APLI Other crude
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Introduction products). Other molec
Page 35 and 36:
Introduction Other studies performe
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Introduction APLI-FT ICR-MS Crude o
Page 39 and 40:
Introduction spectrometry in as muc
Page 41 and 42: Introduction catalytic processing t
Page 43 and 44: Introduction Figure 1-6 Kendrick ma
Page 45 and 46: Introduction including determinatio
Page 47 and 48: Introduction 1.5 Scope and Signific
Page 49 and 50: Experimental e) Other model mixture
Page 51 and 52: Experimental 2.2.2 Preparation of O
Page 53 and 54: Experimental 2.4 Graphical Presenta
Page 55 and 56: Results and Discussion experiment.
Page 57 and 58: Results and Discussion Intens. [%]
Page 59 and 60: Results and Discussion common featu
Page 61 and 62: Results and Discussion 3.2 APCI-TOF
Page 63 and 64: Results and Discussion These compou
Page 67 and 68: Results and Discussion Ions were pr
Page 71 and 72: Results and Discussion procedure ba
Page 75 and 76: Results and Discussion to produce m
Page 77 and 78: Results and Discussion 519.5863 519
Page 79 and 80: Results and Discussion Higher mass
Page 87 and 88: Results and Discussion isolated fro
Page 91: Results and Discussion Intens. [%]
Page 97 and 98: Results and Discussion injected int
Page 101 and 102: Results and Discussion 3.4.8 Quanti
Page 103 and 104: Results and Discussion Int. x 10000
Page 105 and 106: Results and Discussion Table 3.6 Qu
Page 107 and 108: Results and Discussion assessment o
Page 109 and 110: Results and Discussion hydrocarbons
Page 117 and 118: Results and Discussion of n-alkanes
Page 119 and 120: Results and Discussion flow (in I2)
Page 121 and 122: Results and Discussion Other intere
Page 123 and 124: Results and Discussion Figure 3-80
Page 125 and 126: Results and Discussion KMD 2.4 2.2
Page 127 and 128: Results and Discussion KMD 1.1 1 Le
Page 129 and 130: Results and Discussion 3.6.4 Asphal
Page 131 and 132: Conclusions In conclusion we could
Page 133 and 134: References References 1. Fay, R. M.
Page 135 and 136: References 23. Colavecchia, M. V.,
Page 137 and 138: References 47. Dzidic, I., Petersen
Page 139 and 140: References Hydroconversion Processe
Page 141 and 142: References 91. Golovlev, V. V., All
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Appendix Light shredder waste Meas.
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419.4592 C 30 H 59 419.4611 4.6 421
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Liqui Moly car motor oil Meas. m/z
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345.3511 C 25 H 45 345.3516 1.5 349
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