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  • 한국과학기술정보연구원(KISTI) 서울분원 대회의실(별관 3층)
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  • P-ISSN2233-4203
  • E-ISSN2093-8950
  • ESCI, SCOPUS, KCI

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  • P-ISSN 2233-4203
  • E-ISSN 2093-8950

Effect of Ultrasonic Microdroplet Generation in the Low-Temperature Plasma Ionization-Mass Spectrometry

Mass Spectrometry Letters / Mass Spectrometry Letters, (P)2233-4203; (E)2093-8950
2019, v.10 no.4, pp.103-107
https://doi.org/10.5478/MSL.2019.10.4.103
Hyoung Jun Lee (Korea Research Instiute of Standards and Science (KRISS))
Yong-Hyeon Yim (Korea Research Instiute of Standards and Science (KRISS))
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Abstract

Low-temperature plasma (LTP) ionization is one of the ambient ionization methods typically used in mass spectrom- etry (MS) for fast screening of chemicals with minimal or no sample preparation. In spite of various advantages of LTP ioniza- tion method, including simple instrumentation and in-situ analysis, more general applications of the method are limited due to poor desorption of analytes with low volatilities and low ionization efficiencies in the negative ion mode. In order to overcome these limitations, an ultrasonic vibrator of a commercial hand-held humidifier was interfaced with an LTP ionization source, which generated microdroplets from sample solutions and assisted with LTP ionization. Ionization behaviors of various chemi- cals in microdroplet-assisted LTP (MA LTP) were tested and compared with typical LTP ionization from dried samples applied on a surface. MA LTP efficiently ionized small organic, amino, and fatty acids with low volatilities and high polarities, which were hardly ionized using the standard LTP method. Facile interaction of LTP with ultrafine droplets generated by ultrasonic res- onator allows efficient ionization of relatively non-volatile and polar analytes both in the positive and negative ion modes.

keywords
ultrasonic microdroplet generation, low-temperature plasma ionization


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투고일Submission Date
2019-10-24
수정일Revised Date
2019-10-29
게재확정일Accepted Date
2019-10-29
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Mass Spectrometry Letters