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Accelerating Mass Spectrometric Analysis: from Ionization to Data Interpretation
Accelerating Mass Spectrometric Analysis: from Ionization to Data Interpretation
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211153108
- ISBN
- 9798346398035
- DDC
- 660
- 저자명
- Hu, Yanyang.
- 서명/저자
- Accelerating Mass Spectrometric Analysis: from Ionization to Data Interpretation
- 발행사항
- [Sl] : Purdue University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 198 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-05, Section: B.
- 주기사항
- Advisor: Cooks, R. Graham.
- 학위논문주기
- Thesis (Ph.D.)--Purdue University, 2024.
- 초록/해제
- 요약Mass spectrometry (MS) is a powerful tool for analyzing complex mixtures, offering valuable information regarding identification and quantification for laboratory research, both fundamental and applied. Manipulating ions using electrostatic and electrodynamic fields in a vacuum environment, MS is inherently fast and capable of generating diverse structural information. However, the potential speed of MS analysis is often hindered due to the necessity of separating complex mixtures prior to injection into the mass spectrometer. In this dissertation, we demonstrate methods to improve the speed of mass spectrometric mixture analysis at every stage, from ionization to ion trapping, and eventually to data analysis.One solution to the challenge of increasing speed is ambient ionization using nESI coupled with microdroplet-based reaction acceleration. During the travel of the microdroplet from the ionization source to the inlet of the mass spectrometer, a derivatization reaction was shown to increases the signal of compounds with a targeted functional group from the mixture within milliseconds. This eliminated the need for time-consuming chromatographical separation, allowing for class-based mixture analysis (e.g.phenolic compounds, chapter 2). This accelerated chemical reaction mechanism was studied using the Katritzky reaction and a large surface-tovolume ratio (chapter 3). It is suggested that acceleration is associated with an electric double layer, which creates a strong electric field near the air-liquid interface.The second part of the discussion on speeding up mixture component identification uses a modified ion trap and a new scan type: two-dimensional tandem mass spectrometry (2D MS/MS). In this experiment, MS/MS data of all precursors is recorded without isolation, thereby allowing characterization of each molecule in the mixture using a single ion injection. The generated data is stored in an image format where one dimension represents the precursor domain while the other dimension represents the product m/z values. This allows for the structural interpretation of all mixture components from a single spectrum. Applications of this technology include developing point-of-care assays to analyze patient blood HIV drug levels in less than five minutes (chapter 5 and 6) and the in-situanalysis of sulfonamides in milk in less than one minute (chapter 7) using portable mass spectrometers.The third improvement is focused on novel data analysis techniques. In one case, the effects of an accelerated reaction on a complex mixture were visualized using subtracted 2D MS/MS 20 spectra, which provided an additional layer of information, speeding up the processing and interpretation of an unknown mixture (chapter 8). In another case, raw 2D MS/MS spectra were formatted and processed for machine learning analysis, which was used to classify and identify eight different bacteria based on lipid region profiles within seconds.
- 일반주제명
- Surfactants
- 일반주제명
- Mass spectrometry
- 일반주제명
- Reagents
- 일반주제명
- Bubbles
- 일반주제명
- Electric fields
- 일반주제명
- Solvents
- 일반주제명
- Neural networks
- 일반주제명
- Data processing
- 일반주제명
- Kinetics
- 일반주제명
- Scientific imaging
- 일반주제명
- Chemical bonds
- 일반주제명
- Energy
- 일반주제명
- Phenols
- 일반주제명
- Libraries
- 일반주제명
- Analytical chemistry
- 일반주제명
- Electromagnetics
- 일반주제명
- Organic chemistry
- 기타저자
- Purdue University.
- 기본자료저록
- Dissertations Abstracts International. 86-05B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■020 ▼a9798346398035
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■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a660
■1001 ▼aHu, Yanyang.
■24510▼aAccelerating Mass Spectrometric Analysis: from Ionization to Data Interpretation
■260 ▼a[Sl]▼bPurdue University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a198 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-05, Section: B.
■500 ▼aAdvisor: Cooks, R. Graham.
■5021 ▼aThesis (Ph.D.)--Purdue University, 2024.
■520 ▼aMass spectrometry (MS) is a powerful tool for analyzing complex mixtures, offering valuable information regarding identification and quantification for laboratory research, both fundamental and applied. Manipulating ions using electrostatic and electrodynamic fields in a vacuum environment, MS is inherently fast and capable of generating diverse structural information. However, the potential speed of MS analysis is often hindered due to the necessity of separating complex mixtures prior to injection into the mass spectrometer. In this dissertation, we demonstrate methods to improve the speed of mass spectrometric mixture analysis at every stage, from ionization to ion trapping, and eventually to data analysis.One solution to the challenge of increasing speed is ambient ionization using nESI coupled with microdroplet-based reaction acceleration. During the travel of the microdroplet from the ionization source to the inlet of the mass spectrometer, a derivatization reaction was shown to increases the signal of compounds with a targeted functional group from the mixture within milliseconds. This eliminated the need for time-consuming chromatographical separation, allowing for class-based mixture analysis (e.g.phenolic compounds, chapter 2). This accelerated chemical reaction mechanism was studied using the Katritzky reaction and a large surface-tovolume ratio (chapter 3). It is suggested that acceleration is associated with an electric double layer, which creates a strong electric field near the air-liquid interface.The second part of the discussion on speeding up mixture component identification uses a modified ion trap and a new scan type: two-dimensional tandem mass spectrometry (2D MS/MS). In this experiment, MS/MS data of all precursors is recorded without isolation, thereby allowing characterization of each molecule in the mixture using a single ion injection. The generated data is stored in an image format where one dimension represents the precursor domain while the other dimension represents the product m/z values. This allows for the structural interpretation of all mixture components from a single spectrum. Applications of this technology include developing point-of-care assays to analyze patient blood HIV drug levels in less than five minutes (chapter 5 and 6) and the in-situanalysis of sulfonamides in milk in less than one minute (chapter 7) using portable mass spectrometers.The third improvement is focused on novel data analysis techniques. In one case, the effects of an accelerated reaction on a complex mixture were visualized using subtracted 2D MS/MS 20 spectra, which provided an additional layer of information, speeding up the processing and interpretation of an unknown mixture (chapter 8). In another case, raw 2D MS/MS spectra were formatted and processed for machine learning analysis, which was used to classify and identify eight different bacteria based on lipid region profiles within seconds.
■590 ▼aSchool code: 0183.
■650 4▼aSurfactants
■650 4▼aMass spectrometry
■650 4▼aReagents
■650 4▼aBubbles
■650 4▼aElectric fields
■650 4▼aSolvents
■650 4▼aNeural networks
■650 4▼aData processing
■650 4▼aKinetics
■650 4▼aScientific imaging
■650 4▼aChemical bonds
■650 4▼aEnergy
■650 4▼aPhenols
■650 4▼aLibraries
■650 4▼aAnalytical chemistry
■650 4▼aElectromagnetics
■650 4▼aOrganic chemistry
■690 ▼a0791
■690 ▼a0486
■690 ▼a0800
■690 ▼a0607
■690 ▼a0490
■71020▼aPurdue University.
■7730 ▼tDissertations Abstracts International▼g86-05B.
■790 ▼a0183
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17164968▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


