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

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Results and Discussion As far as comparing dirty oil to unused one is concerned, Kendrick plot allowed giving an insightful idea about what happens to the composition of oil engine upon mileage. Figure 3-87 shows a Kendrick plot of general standard car oil from Calpam Company overlapped to a contaminated-through-usage oil from an unknown car. Assuming that this Calpam oil or a similar one has been used in a new car and changed after a certain interval of time to give the contaminated one, the plot shows a depletion of the oil structural composition. It seems that the components have been degraded by observing the shift of KMD value of the contaminated through usage oil components compared with those of Calpam oil. As well decomposition of the oil is significant in plot. A large number of decomposed compounds appear in low mass range of m/z 100-250. These compounds are not found within the Calpam sample. To this end, this approach can be employed to understand compositional evolution of car motor oils after they are used. Understanding such changes in composition can guide car oil companies in developing better car oil that can serve for prolonged period before service is needed. KMD 1.1 Calpam Motor Oil Dirty Motor Oil 1 0.9 0.8 0.7 0.6 0.5 0.4 0 100 200 300 400 500 600 700 800 NKM Figure 3-87 Kendrick plot overlap of Calpam motor oil and contaminated through usage motor oil 111
Results and Discussion 3.6.4 Asphaltenes The complex mixture within Asphaltenes was displayed by Kendrick plot. Figure 3-88 shows the compositional display of one sample of bitumen that was dissolved in DCM under positive ESI conditions. This choice of DCM enabled to look at a wide range of components because the plot demonstrates a wide KMD range. KMD 1.2 Bitumen 1 (DCM-ESI) 1 0.8 0.6 0.4 0.2 0 0 200 400 600 800 1000 NKM Figure 3-88 Kendrick plot of bitumen 1 upon ESI-MS using DCM solvent KMD 1.4 Bitumen 1 (Heptane-APCI) 1.2 1 0.8 0.6 0.4 0.2 0 0 200 400 600 800 NKM Figure 3-89 Kendrick plot of bitumen 1 upon APCI-MS using n-heptane solvent 112
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
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Results and Discussion These compou
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Results and Discussion Ions were pr
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Results and Discussion procedure ba
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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 81 and 82: Results and Discussion Intens. [%]
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 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: Results and Discussion KMD 1.1 1 Le
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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