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The application of gas chromatography-time-of-flight mass spectrometry to the analysis of monomethyl mercury at sub-picogram levels

Title
The application of gas chromatography-time-of-flight mass spectrometry to the analysis of monomethyl mercury at sub-picogram levels
Author
김기현
Keywords
Monomethyl mercury (MMHg); Methyl mercury chloride (MMC); Time-of-flight mass spectrometry (TOF-MS)
Issue Date
2013-09
Publisher
Elsevier Science B.V
Citation
Microchemical Journal, 2013, 110, P.107-112
Abstract
The analysis of sub-picogram-range methyl mercury generally requires complicated hyphenated instrumentation combining chromatographic systems for the separation and identification of organic Hg components (by GC-MS or LC-MS) and inorganic mass spectrometric techniques for their quantification. To eliminate the complexities and possible biases associated with such complicated hyphenated systems, it is highly desirable to develop a simplified but reliable single-stage instrumental method for the analysis of methyl mercury in environmental samples. To this end, this paper presents an analytical technique based on thermal desorption (TD) - GC - time of flight (TOF) mass spectrometry (MS) for the quantitative analysis of monomethyl mercury (MMHg) prepared in a liquid phase standard. This optimized system was calibrated using standards in the range of 18 pg to 45 ng and yielded a coefficient of correlation of R-2 = 0.9996. This GC-TOF-MS system allowed very low detection limits for MMHg (MDL = 1.86 pg and LOD = 0.031 pg) with good reproducibility (RSE = 1.82%). The potential applicability of the GC-TOF-MS system is highlighted for the trace-level analysis of sub-pg-range of methyl mercury. (C) 2013 Elsevier B.V. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0026265X13000386?via%3Dihub
ISSN
0026-265X
DOI
10.1016/j.microc.2013.03.002
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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