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Accelerating Mass Spectrometric Analysis: from Ionization to Data Interpretation
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  
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MARC

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■24510▼aAccelerating  Mass  Spectrometric  Analysis:  from  Ionization  to  Data  Interpretation
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■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.

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