Name: real-time breath analysis by using secondary nanoelectrospray ionization coupled to high resolution mass spectrometry
Uploaded: 2018-03-09T12:30:00
Description: Watch this Scientific Journal Video about Real-time Breath Analysis by Using Secondary Nanoelectrospray Ionization Coupled to High Resolution Mass Spectrometry at JoVE.com

이 작품은 국립 자연 과학 재단의 중국 (No. 91543117)에 의해 재정적으로 지원 되었습니다.

주의: 사용 하기 전에 모든 관련 물질 안전 데이터 시트 (MSDS)를 참조 하십시오. 사용 하십시오 적절 한 개인 보호 장비, 예를 들면, 실험실 외 투, 장갑, 고글, 전체 길이 바지와 폐쇄 발가락 신발).
1. 초-nanoESI 소스를 설정
<ol><li>SESI 과정, 즉에 따르면 Sec nanoESI 소스를 설정 호흡 가스는 분무 깃털 교차 고 충전된 물방울 (그림 1)에 의해 이온?...

<ol>
	<li>De Lacy Costello, B., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+review+of+the+volatiles+from+the+healthy+human+body.">A review of the volatiles from the healthy human body.</a> J. Breath Res. 8 (1), 014001-014030 (2014).</li><li>Phillips, M., Greenberg, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Ion-trap+detection+of+volatile+organic+compounds+in+alveolar+breath.">Ion-trap detection of volatile organic compounds in alveolar breath.</a> Clin. Chem. 38 (1), 60-65 (1992).</li><li>Mart&#237;nez-Lozano Sinues, P., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Circadian+variation+of+the+human+metabolome+captured+by+real-time+breath+analysis.">Circadian variation of the human metabolome captured by real-time breath analysis.</a> PLoS One. 9 (12), 0114422-0114438 (2014).</li><li>Garcia-Gomez, D., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Secondary+electrospray+ionization+coupled+to+high-resolution+mass+spectrometry+reveals+tryptophan+pathway+metabolites+in+exhaled+human+breath.">Secondary electrospray ionization coupled to high-resolution mass spectrometry reveals tryptophan pathway metabolites in exhaled human breath.</a> Chem. Common. 52 (55), 8526-8528 (2016).</li><li>Garcia-Gomez, D., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Real-time+quantification+of+amino+acids+in+the+exhalome+by+secondary+electrospray+ionization-mass+spectrometry:+A+proof-of-principle+Study.">Real-time quantification of amino acids in the exhalome by secondary electrospray ionization-mass spectrometry: A proof-of-principle Study.</a> Clin. Chem. 62 (9), 1230-1237 (2016).</li><li>Mart&#237;nez-Lozano Sinues, P., Kohler, M., Brown, S. A., Zenobia, R., Dallmann, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Gauging+circadian+variation+in+ketamine+metabolism+by+real-time+breath+analysis.">Gauging circadian variation in ketamine metabolism by real-time breath analysis.</a> Chem. Common. 53 (14), 2264-2267 (2017).</li><li>Gamez, G., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Real-time,+in+vivo+monitoring+and+pharmacokinetics+of+valproic+acid+via+a+novel+biomarker+in+exhaled+breath.">Real-time, in vivo monitoring and pharmacokinetics of valproic acid via a novel biomarker in exhaled breath.</a> Chem. Common. 47 (17), 4884-4886 (2011).</li><li>Li, X., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Drug+pharmacokinetics+determined+by+real-time+analysis+of+mouse+breath.">Drug pharmacokinetics determined by real-time analysis of mouse breath.</a> Angew. Chem. Int. Ed. 54 (27), 7815-7818 (2015).</li><li>Amorim, L. L. A., Cardeal, Z. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Breath+air+analysis+and+its+use+as+a+biomarker+in+biological+monitoring+of+occupational+and+environmental+exposure+to+chemical+agents.">Breath air analysis and its use as a biomarker in biological monitoring of occupational and environmental exposure to chemical agents.</a> J. Chromatogr. B. 853 (1-2), 1-9 (2007).</li><li>Bajtarevic, A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Noninvasive+detection+of+lung+cancer+by+analysis+of+exhaled+breath.">Noninvasive detection of lung cancer by analysis of exhaled breath.</a> BMC Cancer. 9, 348 (2009).</li><li>Smith, D., Wang, T. S., Pysanenko, A., &#352;pan&#283;l, P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+selected+ion+flow+tube+mass+spectrometry+study+of+ammonia+in+mouth-+and+nose-exhaled+breath+and+in+the+oral+cavity.">A selected ion flow tube mass spectrometry study of ammonia in mouth- and nose-exhaled breath and in the oral cavity.</a> Rapid Commun. Mass Spectrom. 22 (6), 783-789 (2008).</li><li>Li, X., Huang, L., Zhu, H., Zhou, Z. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Direct+human+breath+analysis+by+secondary+nano-electrospray+ionization+ultrahigh+resolution+mass+spectrometry:+Importance+of+high+mass+resolution+and+mass+accuracy.">Direct human breath analysis by secondary nano-electrospray ionization ultrahigh resolution mass spectrometry: Importance of high mass resolution and mass accuracy.</a> Rapid Commun. Mass Spectrom. 31 (3), 301-308 (2017).</li><li>Mart&#237;nez-Lozano, P., Fernandez de la Mora, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Electrospray+ionization+of+volatiles+in+breath.">Electrospray ionization of volatiles in breath.</a> Int. J. Mass Spectrom. 265 (1), 68-72 (2007).</li><li>Zeng, Q., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Detection+of+creatinine+in+exhaled+breath+of+humans+with+chronic+kidney+disease+by+extractive+electrospray+ionization+mass+spectrometry.">Detection of creatinine in exhaled breath of humans with chronic kidney disease by extractive electrospray ionization mass spectrometry.</a> J. Breath Res. 10 (1), 016008-016015 (2016).</li><li>Chen, H. W., Wortmann, A., Zhang, W. H., Zenobi, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Rapid+in+vivo+fingerprinting+of+nonvolatile+compounds+in+breath+by+extractive+electrospray+ionization+quadrupole+time-of-flight+mass+spectrometry.">Rapid in vivo fingerprinting of nonvolatile compounds in breath by extractive electrospray ionization quadrupole time-of-flight mass spectrometry.</a> Angew. Chem. Int. Ed. 46 (4), 580-583 (2007).</li><li>Benoi, F. M., Davldson, W. R., Lovett, A. M., Nacson, S., Ngo, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Breath+analysis+by+atmospheric+pressure+ionization+mass+spectrometry.">Breath analysis by atmospheric pressure ionization mass spectrometry.</a> Anal. Chem. 55 (4), 805-807 (1983).</li><li>Bregy, L., Mart&#237;nez-Lozano Sinues, P., Nudnova, M. M., Zenobi, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Real-time+breath+analysis+with+active+capillary+plasma+ionization-ambient+mass+spectrometry.">Real-time breath analysis with active capillary plasma ionization-ambient mass spectrometry.</a> J. Breath Res. 8 (2), 027102-027110 (2014).</li><li>Gaugg, M. T., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Expanding+metabolite+coverage+of+real-time+breath+analysis+by+coupling+a+universal+secondary+electrospray+ionization+source+and+high+resolution+mass+spectrometry-a+pilot+study+on+tobacco+smokers.">Expanding metabolite coverage of real-time breath analysis by coupling a universal secondary electrospray ionization source and high resolution mass spectrometry-a pilot study on tobacco smokers.</a> J. Breath Res. 10 (1), 016010-016020 (2016).</li><li>Mart&#237;nez-Lozano, P., Zingaro, L., Finiguerra, A., Cristoni, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Secondary+electrospray+ionization-mass+spectrometry:+breath+study+on+a+control+group.">Secondary electrospray ionization-mass spectrometry: breath study on a control group.</a> J. Breath Res. 5 (1), 016002-016012 (2011).</li><li>Mart&#237;nez-Lozano Sinues, P., Zenobi, R., Kohler, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Analysis+of+the+exhalome+a+diagnostic+tool+of+the+future.">Analysis of the exhalome a diagnostic tool of the future.</a> Chest. 144 (3), 746-749 (2013).</li><li>Mart&#237;nez-Lozano Sinues, P., Fernandez de la Mora, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Direct+analysis+of+fatty+acid+vapors+in+breath+by+electrospray+ionization+and+atmospheric+pressure+Ionization-Mass+Spectrometry.">Direct analysis of fatty acid vapors in breath by electrospray ionization and atmospheric pressure Ionization-Mass Spectrometry.</a> Anal. Chem. 80 (21), 8210-8215 (2008).</li><li>Mart&#237;nez-Lozano Sinues, P., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Breath+analysis+in+real+time+by+mass+spectrometry+in+chronic+obstructive+pulmonary+disease.">Breath analysis in real time by mass spectrometry in chronic obstructive pulmonary disease.</a> Respiration. 87 (4), 301-310 (2014).</li><li>Mart&#237;nez-Lozano Sinues, P., Kohler, M., Zenobi, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Monitoring+diurnal+changes+in+exhaled+human+breath.">Monitoring diurnal changes in exhaled human breath.</a> Anal. Chem. 85 (1), 369-373 (2013).</li><li>Chen, H. W., Zenobi, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Neutral+desorption+sampling+of+biological+surfaces+for+rapid+chemical+characterization+by+extractive+electropray+ionization+mass+spectrometry.">Neutral desorption sampling of biological surfaces for rapid chemical characterization by extractive electropray ionization mass spectrometry.</a> Nat. Protoc. 3 (9), 1467-1475 (2008).</li><li>Li, X., Hu, B., Ding, J., Chen, H. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Rapid+characterization+of+complex+viscous+samples+at+molecular+levels+by+neutral+desorption+extractive+electrospray+ionization+mass+spectrometry.">Rapid characterization of complex viscous samples at molecular levels by neutral desorption extractive electrospray ionization mass spectrometry.</a> Nat. Protoc. 7 (6), 1010-1025 (2011).</li><li>Gordon, S. M., Szidon, J. P., Krotoszynski, B. K., Gibbons, R. D., O'Neill, H. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Volatile+organic+compounds+in+exhaled+air+from+patients+with+lung+cancer.">Volatile organic compounds in exhaled air from patients with lung cancer.</a> Clin. Chem. 31 (8), 1278-1282 (1985).</li><li>Ding, J. H., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Development+of+extractive+electrospray+ionization+ion+trap+mass+spectrometry+in+vivo+breath+analysis.">Development of extractive electrospray ionization ion trap mass spectrometry in vivo breath analysis.</a> Analyst. 134 (10), 2040-2050 (2009).</li><li>Basum, G., Dahnke, H., Halmer, D., Hering, P., M&#252;rtz, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Online+recording+of+ethane+trances+in+human+breath+via+infrared+laser+spectroscopy.">Online recording of ethane trances in human breath via infrared laser spectroscopy.</a> J. Appl. Physiol. 95 (6), 2583-2590 (2003).</li><li>T&#248;ien, &. #. 2. 1. 6. ;. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Automated+open+flow+respirometry+in+continuous+and+long-term+measurements:+design+and+principles.">Automated open flow respirometry in continuous and long-term measurements: design and principles.</a> J. Appl. Physiol. 114 (8), 1094-1107 (2013).</li><li>Huang, L., Li, X., Xu, M., Huang, Z. X., Zhou, Z. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Identification+of+relatively+high+molecular+weight+compounds+in+human+breath+using+secondary+nano+electrospray+ionization+ultrahigh+resolution+mass+spectrometry.">Identification of relatively high molecular weight compounds in human breath using secondary nano electrospray ionization ultrahigh resolution mass spectrometry.</a> Chem. J. Chinese U. 38 (5), 752-757 (2017).</li></ol>

Sec-nanoESI 소스 상용 nanoESI 원본을 기반 구축, 이온화 효율 ESI 소스30을 사용 하 여 보다 높은 수준 이다. 또한, 이온화 효율은 더욱 향상 닫힌된 챔버에 프로세스 분리로 주위 배경 공기에서와 같은 시간을 용이 하 게 가스 샘플 스프레이 깃털 사이 혼합. 초-nanoESI를 사용 하 여 덜 매개 변수는 ESI 소스, 쉽게 설치, 응용 프로그램 및 유지 보수에 비해 최적화가 필요 합니다.
<p class=...

현대 분석 기술의 빠른 개발, 휘발성 유기 화합물 (Voc)의 수백 인간의 exhaled 호흡1에서 확인 되었습니다. 이러한 Voc 치경 공기 (건강 한 성인에 대 한 ~ 350 mL)에서 주로 발생 하 고 해부학 죽은 공간 공기 (~ 150 mL)2, 신체 대사3,,45,6,7에 의해 영향을 받는 ,8 , 환경 오염9, 각각. 결과적으로, 식별,이 Voc 질병 진단과 환경 노출에 대 한 비-침략 적 방식으로 생체로 사용 될 것을 약속 하는.
가스 크로마토그래피 질량 분석 (GC-MS)은 가장 널리 사용 되는 기술 exhaled Voc2의 정성 및 정량 분석을 위해, 실시간 호흡 분석을 위해 개발 되었습니다, 직접 MS 기술을의 장점 높은 시간 해상도 및 간단한 샘플 사전 준비입니다. 직접 MS 기술, 양성자 이전 반응 MS (PTR-MS)10, 같은 선택 이온 흐름 관 석사 (선별-석사)11, 보조 분무 이온화 MS (SESI-MS)12,13 (또한 추출 물 분무로 라는 MS, MS EESI14,15이온화) 추적 대기 가스 분석기 (타가)16 및 플라즈마 이온화 MS (PI-MS)17 는 조사에서 최근 몇 년 동안.
모든 직접 MS 기술, 중 SESI 보편적인 부드러운 이온화 기술19,20,21;로 유명 하다 그리고 소스는 쉽게 사용자 지정 하 여 질량 분석기, 예를 들면, 시간의 비행 질량 분 서 계8,15의 다른 종류를 결합, 이온 트랩 질량 분석기14 그리고 orbitrap 질량 분석기12 ,18. 지금까지, SESI MS는 성공적으로 사용 되었다 호흡기 질환22, 진단 circadian 리듬3,,623, 약 동학7,8, 측정 및 대사 경로4, 등을 밝히고 있다. 가장 최근에, 상업 SESI 소스 사용할 수 있게 했다.
이 연구에서 손쉬운 소형 보조 nanoelectrospray 이온화 소스 (초-nanoESI) 설정 하 고 고해상도 질량 분석기를 결합 했다. 호흡에 exhaled Voc의 실시간 측정을 제시 했다.

<table>
	<tbody>
		<tr>
			<td>Ultrapure water</td>
			<td>Merck Millipore, USA</td>
			<td>MPGP04001</td>
			<td>Resistance &#62;18.2 M&#937;&#183;cm</td>
		</tr>
		<tr>
			<td>Formic acid</td>
			<td>Sigma-Aldrich, USA</td>
			<td>F0507</td>
			<td>Corrosive to the respiratory tract.</td>
		</tr>
		<tr>
			<td>Nitrogen gas</td>
			<td>Guangzhou Shiyuan Gas Co. Ltd., China</td>
			<td>N.A.a</td>
			<td>Purity &#62;99.99%</td>
		</tr>
		<tr>
			<td>Q Exactive hybrid quadrupole-orbitrap mass spectrometer</td>
			<td>Thermo Scientific, USA</td>
			<td>02634L(S/N)</td>
			<td>Beware of high voltage and high temperature</td>
		</tr>
		<tr>
			<td>NanoESI source</td>
			<td>Thermo Scientific, USA</td>
			<td>ES002373(S/N); ES071(P/N)</td>
			<td>Beware of high voltage and high temperature</td>
		</tr>
		<tr>
			<td>Nano LC pump</td>
			<td>Thermo Scientific, USA</td>
			<td>5041.0010A(P/N)</td>
			<td>/</td>
		</tr>
		<tr>
			<td>Xcalibur software (Version 3.0)</td>
			<td>Thermo Scientific, USA</td>
			<td>BRE0008596</td>
			<td>/</td>
		</tr>
		<tr>
			<td>Dino-Lite Digital Microscope</td>
			<td>Tech Video System (SuZhou) Co.Ltd., China</td>
			<td>CQ401833R(S/N)</td>
			<td>/</td>
		</tr>
		<tr>
			<td>Nafion tubing</td>
			<td>Perma Pure LLC, USA</td>
			<td>ME60</td>
			<td>/</td>
		</tr>
		<tr>
			<td>PTFE tubing (I.D. 4 mm)</td>
			<td>Dongguan Hongfu Insulating Material Co. Ltd., China</td>
			<td>N.A.</td>
			<td>Beware of the possible loss of polar compounds</td>
		</tr>
		<tr>
			<td>Mass flow controller</td>
			<td>Line-Tech, Korea</td>
			<td>M15122007 (S/N)</td>
			<td>/</td>
		</tr>
		<tr>
			<td>Flow meter</td>
			<td>Yuyao Industrial Automation Meter Factory, China</td>
			<td>40784</td>
			<td>/</td>
		</tr>
		<tr>
			<td>aN.A.: not available.</td>
			<td></td>
			<td></td>
			<td></td>
		</tr>
	</tbody>
</table>

real-time breath analysis by using secondary nanoelectrospray ionization coupled to high resolution mass spectrometry

비-침략 적 방식으로 질병 진단과 환경 노출에 대 한 생체로 사용할 수 있습니다 이후 exhaled 휘발성 유기 화합물 (Voc) 상당한 관심을 자극 했습니다. 이 작품에서 선물이 고 분해능 질량 분석 (초-nanoESI-HRMS)에 결합 하는 보조 nanoelectrospray 이온화를 사용 하 여 실시간으로 exhaled Voc를 특성화 하는 프로토콜. 수 제 초-nanoESI 소스로 쉽게 세워졌다 기반 상용 nanoESI 소스에. 봉우리의 수백 exhaled 호흡의 배경 뺀 질량 스펙트럼에서 관찰 되었다 그리고 대량 정확도 값은-4.0-13.5 ppm와-20.3-긍정적이 고 부정적인 이온 검출 모드에서 1.3 ppm 각각. 봉우리는 정확한 질량 동위 원소 패턴에 따라 정확한 원소 구성으로 할당 되었다. 30 s 한 증발 기 측정에 사용 되 고 6 복제 된 측정에 대 한 약 7 분 소요.

그림 3 m/z 50-750 모두 긍정적이 고 부정적인 이온 검출 모드에서 기록의 대량 범위에 숨 지를 보여준다. 291 봉우리 (피크 강도 > 5.0x104) 173 봉우리 (피크 강도 > 3.0x104) 긍정적이 고 부정적인 이온 검출 모드에서 배경 빼고 숨 지문에 각각 관찰 되었습니다. 질량 스펙트럼에 봉우리를 식별 하려면 세부 정보12,</...

Watch this Scientific Journal Video about Real-time Breath Analysis by Using Secondary Nanoelectrospray Ionization Coupled to High Resolution Mass Spectrometry at JoVE.com

Real-time Breath Analysis by Using Secondary Nanoelectrospray Ionization Coupled to High Resolution Mass Spectrometry

고 분해능 질량 분석 시연 보조 nanoelectrospray 이온화를 사용 하 여 실시간으로 exhaled 호흡의 화학 성분 특성화에 대 한 프로토콜 결합.

고 분해능 질량 분석을 결합 하는 보조 Nanoelectrospray 이온화를 사용 하 여 실시간 호흡 분석

Exhaled volatile organic compounds (VOCs) have aroused considerable interest, since they can serve as biomarkers for disease diagnosis and environmental ...

Research

JoVE Journal

Chemistry

Untargeted Metabolomics from Biological Sources Using Ultraperformance Liquid Chromatography-High Resolution Mass Spectrometry (UPLC-HRMS)

Untargeted Metabolomics from Biological Sources Using Ultraperformance Liquid Chromatography-High Resolution Mass Spectrometry UPLC-HRMS

Ultraperformance 액체 크로마토 그래피 고해상도 질량 분석 (UPLC-HRMS)를 사용하여 생물 소스에서 타겟이 불분명 한 대사

Here we present a workflow to analyze the metabolic profiles for biological samples of interest including; cells, serum, or tissue. The sample is first ...

연구

화학

A Study of the Complexation of Mercury(II) with Dicysteinyl Tetrapeptides by Electrospray Ionization Mass Spectrometry

A Study of the Complexation of MercuryII with Dicysteinyl Tetrapeptides by Electrospray Ionization Mass Spectrometry

전자 분무 이온화 질량 분석에 의해 Dicysteinyl Tetrapeptides와 수은 (II)의 복합체 형성에 관한 연구

In this study we evaluated a method for the characterization of complexes, formed in different relative ratios of mercury(II) to dicysteinyl tetrapeptide, ...

Rapid High-throughput Species Identification of Botanical Material Using Direct Analysis in Real Time High Resolution Mass Spectrometry

실시간 고해상도 질량 분석에 직접 분석을 사용하여 식물 소재의 신속한 높은 처리량 종 확인

We demonstrate that direct analysis in real time-high resolution mass spectrometry can be used to produce mass spectral profiles of botanical material, ...

Fizzy Extraction of Volatile Organic Compounds Combined with Atmospheric Pressure Chemical Ionization Quadrupole Mass Spectrometry

대기압 화학 이온화와 결합 된 휘발성 유기 화합물의 탄산염 추출 4 극자 질량 분광법

Chemical analysis of volatile and semivolatile compounds dissolved in liquid samples can be challenging. The dissolved components need to be brought to ...

Synthesis and Mass Spectrometry Analysis of Oligo-peptoids

합성 및 올리고 peptoids의 질량 분석 분석

Peptoids are sequence-controlled peptide-mimicking oligomers consisting of N-alkylated glycine units. Among many potential applications, peptoids have ...

Characterization of Synthetic Polymers via Matrix Assisted Laser Desorption Ionization Time of Flight (MALDI-TOF) Mass Spectrometry

Characterization of Synthetic Polymers via Matrix Assisted Laser Desorption Ionization Time of Flight MALDI-TOF Mass Spectrometry

매트릭스를 통해 합성 고분자의 특성화 지원 레이저 탈 착 이온화 시간의 비행 (TOF MALDI) 질량 분석

There are many techniques that can be employed in the characterization of synthetic homopolymers, but few provide as useful of information for end group ...

An Efficient Sample Preparation Method to Enhance Carbohydrate Ion Signals in Matrix-assisted Laser Desorption/Ionization Mass Spectrometry

매트릭스 보조 레이저 탈 착/이온화 질량 분석에서 탄수화물 이온 신호를 강화 하는 효율적인 샘플 준비 방법

Sample preparation is a critical process in mass spectrometry (MS) analysis of carbohydrates. Although matrix-assisted laser desorption/ionization (MALDI) ...

High-throughput and Comprehensive Drug Surveillance Using Multisegment Injection-Capillary Electrophoresis-Mass Spectrometry

멀티 주입-모 세관 전기 이동 법 질량 분석을 사용 하 여 높은 처리량 및 포괄적인 약물 감시

New analytical methods are urgently needed to enable high-throughput, yet comprehensive drug screening, given an alarming opioid and prescription drug ...