Compact instrumentation of a μ-GC for real time analysis of sub-ppb VOC mixtures

Rih Sheng Jian, Yi Shiaw Huang, Shih Lung Lai, Lung Yu Sung, Chia Jung Lu*

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

33 引文 斯高帕斯(Scopus)

摘要

We report the instrumentation of a μ-GC system that was capable of performing real-time analysis of sub-ppb-levels of organic mixture vapors. This system consists of a multi-stage preconcentrator/injector, a capillary column with at-column heater configuration and a photo ionization detector (PID). A tablet computer was embedded inside the instrument case to form a stand-alone system that can provide both instrument control and chromatogram data handling without an external computer. Through the compact design of fluidic system, this fully functional GC measured 30 (l) × 17(w) × 8( h) cm and the weight was less than 3. kg. This system could be powered by either a 12. V DC adapter or batteries. Mixtures of 10 organic compounds were tested to demonstrate the performance of this system. Separation of the 10 compounds took only 2. min due to the rapid temperature programming ability of at-column heater. The detection limit ranged from 0.02 to 0.36. ppb can be achieved with 1.0. L sample volume. The analytical cycle including sampling, separation and cooling required only 15. min. The stability of this μ-GC was evaluated by analyzing VOCs at ~. 3. ppb vapor concentration through continuous operation over 24. h. The retention time varied less than 1.2% (RSD, n = 120). The variation in peak areas ranged from 2.2% (benzene) to 5.2% (m-xylene).

原文英語
頁(從 - 到)161-167
頁數7
期刊Microchemical Journal
108
DOIs
出版狀態已發佈 - 2013 五月

ASJC Scopus subject areas

  • 分析化學
  • 光譜

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