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Rapid hydrocarbon analysis using a miniature rectilinear ion trap mass spectrometer
Ewa Sokol1, Kathleen E Edwards, Kuangnan Qian
1Department of Chemistry, 560 Oval Drive, Purdue University, West Lafayette, IN 47907-2084, USA.
The Analyst
|July 23, 2008
Summary
A miniature ion trap mass analyzer rapidly detects and quantifies trace hydrocarbons and heteroatomics in vapor and aqueous samples. This analytical method offers fast, sensitive detection for environmental and industrial monitoring.
Area of Science:
- Analytical Chemistry
- Environmental Science
- Mass Spectrometry
Background:
- Accurate detection of trace organic compounds is crucial for environmental monitoring and industrial process control.
- Miniaturized analytical instruments offer advantages in portability and speed for on-site analysis.
Purpose of the Study:
- To evaluate a miniature ion trap mass analyzer for the rapid analysis of volatile organic compounds (VOCs) and heteroatomics.
- To determine the instrument's capability for detecting and quantifying analytes in both vapor and aqueous phases.
Main Methods:
- Utilized a miniature ion trap mass analyzer for analysis.
- Employed solid sorbent trapping and a membrane interface for sample introduction.
- Analyzed vapors of various hydrocarbons and heteroatomics, including benzene, toluene, and xylenes.
- Examined aqueous solutions containing benzene, toluene, xylenes, hexane, and naphtha distillate.
Main Results:
- Achieved detection and quantification of multiple hydrocarbons and heteroatomics in less than one minute.
- Demonstrated high sensitivity for gas-phase toluene (200 parts per trillion, ppt) and benzene (600 ppt).
- Identified benzene and xylene in aqueous solutions with limits of detection (LODs) of 200 and 400 parts per billion (ppb), respectively.
- Showcased a linear dynamic range of three orders of magnitude for vapor samples and two orders for aqueous samples.
Conclusions:
- The miniature ion trap mass analyzer is a viable tool for rapid, sensitive detection of trace organic compounds.
- The instrument's performance in both vapor and aqueous phases supports its application in diverse environmental and industrial settings.
- Fast analysis times and broad dynamic ranges make this technology suitable for real-time monitoring and quality control.
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