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

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Results and Discussion spectrum appears to comprise less number of analytes than that of ESI. Nevertheless the components of Bitumen 1 are successfully ionised without any recorded fragmentation. Since such asphaltene fractions has been mainly measured by ESI or other revolutionised methodologies, 89,100 the acquisition of such data under APCI conditions proves the importance of the methodology to attain a deeper understanding of asphaltenes. Regarding Bitumen 2, the sample was dissolved in DCM and injected into the APCI source. The mass spectra of this sample shown in figure 3-73 suggests a huge similarity to bitumen 1 however the matching components differ with their relative abundances in both samples. This would suggest that the two samples revert to two different sources of original asphaltenes. In both samples there had been many analytes that appeared with low abundance. Some of them were even hardly resolved with the TOF-MS. In my opinion the interface of APCI to high resolution MS should be established to effectively then analyse full compositions of complex mixtures. Intens. [%] 100 80 60 40 20 0 +MS 555.4 511.4 274.2 599.4 659.4 703.5 467.4 747.5 236.1 372.2 441.3 190.1 791.5 835.5 879.6 200 300 400 500 600 700 800 900 m/z Figure 3-71 ESI mass spectrum of bitumen 1 using DCM as mobile phase 97
Results and Discussion Intens. [%] 100 297.2 +MS 80 403.3 60 40 241.2 319.1 347.2 467.1 541.4 20 663.4 0 200 300 400 500 600 700 800 900 m/z 741.2 Figure 3-72 APCI mass spectrum of bitumen 1 using DCM as mobile phase Intens. [%] 100 80 242.9 257.2 +MS 60 285.3 383.2 40 218.8 316.7 20 0 347.2 403.3 467.1 190.8 507.5 541.4 639.6663.5 200 250 300 350 400 450 500 550 600 650 m/z Figure 3-73 APCI mass spectrum of bitumen 2 using DCM as mobile phase 3.6 Kendrick Plot and Interpretation of Complex Data from Various Complex Mixtures 3.6.1 Light Shredder Waste The externally calibrated masses of the waste sample were converted to Kendrick masses and sorted into groups according to common Kendrick mass defect. The compositional analysis is then displayed in the Kendrick plot represented in figure 3-74. This is of course inspired from the employment of such plots to display chemical contents of complex mixtures in other sources measured by the group of Marshall extensively discussed earlier. The chemically sorted display shows other 98
Page 1 and 2:
Development of a Novel Mass Spectro
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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
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Introduction aliphatic hydrocarbons
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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
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Introduction Other studies performe
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Introduction APLI-FT ICR-MS Crude o
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Introduction spectrometry in as muc
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Introduction catalytic processing t
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Introduction Figure 1-6 Kendrick ma
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Introduction including determinatio
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Introduction 1.5 Scope and Signific
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Experimental e) Other model mixture
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Experimental 2.2.2 Preparation of O
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Experimental 2.4 Graphical Presenta
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Results and Discussion experiment.
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Results and Discussion Intens. [%]
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Results and Discussion common featu
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Results and Discussion 3.2 APCI-TOF
Page 63 and 64: Results and Discussion These compou
Page 65 and 66: Results and Discussion Intens. [%]
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 93 and 94: Results and Discussion 3.4.5 Tandem
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 113: Results and Discussion Intens. [%]
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
Page 143 and 144: Appendix Light shredder waste Meas.
Page 145 and 146: 419.4592 C 30 H 59 419.4611 4.6 421
Page 147 and 148: Liqui Moly car motor oil Meas. m/z
Page 149 and 150: 345.3511 C 25 H 45 345.3516 1.5 349
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