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An accurate and reliable analysis of trimethylamine using thermal desorption and gas chromatography-time of flight mass spectrometry

Title
An accurate and reliable analysis of trimethylamine using thermal desorption and gas chromatography-time of flight mass spectrometry
Author
김기현
Keywords
Trimethylamine; Sorbent tube; Thermal desorption; Time of flight mass spectrometry
Issue Date
2013-05
Publisher
Elsevier Science B.V
Citation
Analytica Chimica Acta, May 2013, 780(30), P.46-54
Abstract
Trimethylamine (TMA) is well-known for manifesting the odor of rotting fish and urine. The analysis of TMA in environmental samples generally suffers from low reproducibility and poor sensitivity. In this study, a technique for the quantitative analysis of gas phase TMA was developed using thermal desorption (TD)-gas chromatography (GC)-time of flight mass spectrometry (TOF-MS). This new approach yielded good linearity (R-2=0.9930), precision (RSE=1.59%), and high sensitivity with the method detection limit (MDL) of 51 pg, i.e., detection of 0.021 ppb of TMA at 1 L sample (limit of detection CLOD): 5.32 pg (0.002 ppb). This method was tested against gas samples collected from two representative sources of TMA: (I) rotten thornback fish and (2) cat urine-soaked clay. The concentration of TMA in these samples, when analyzed after treatment at varying dilution ratios, averaged 293 +/- 29.7 ppm (RSE=3.82%) and 74.1 +/- 5.78 ppb (RSE=3.19%), respectively. The feasibility of this approach, when tested with TD GC Quadruple (Q) MS, showed a good compatibility with moderately reduced sensitivity. The results of this study demonstrated that one can achieve highly reliable and reproducible analysis of TMA from environmental samples when using thermal desorption (for pretreatment) and detection (by the TOF or Q-MS system). (C) 2013 Elsevier B.V. All rights reserved.
URI
https://ac.els-cdn.com/S0003267013005011/1-s2.0-S0003267013005011-main.pdf?_tid=spdf-b61eb5f4-38b9-4245-a15b-071da1f4ea7a&acdnat=1519537990_37e8c0c0e906502847b50b5795b86501http://hdl.handle.net/20.500.11754/44598
ISSN
0003-2670
DOI
10.1016/j.aca.2013.03.069
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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