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[A gas chromatographic method to decrease the detection limit of trace benzene in CS2 extract].

A L Zhang1, J T Zhou, D Wang

  • 1College of Chemical Engineering, Dalian University of Technology, Dalian 116011, China.

Se Pu = Chinese Journal of Chromatography
|January 30, 2003
PubMed
Summary
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This study presents a simplified gas chromatography method for detecting trace benzene in coastal water extracts. The optimized method achieves a low detection limit of 4 µg/L with high repeatability for environmental monitoring.

Area of Science:

  • Environmental Chemistry
  • Analytical Chemistry

Context:

  • Coastal water contamination poses risks to marine ecosystems and human health.
  • Accurate detection of benzene, a common pollutant, is crucial for environmental assessment.

Purpose:

  • To develop and optimize a gas chromatography (GC) method for sensitive benzene detection in carbon disulfide (CS2) extracts from coastal water.
  • To improve the detection limit and repeatability of benzene analysis.

Summary:

  • A simplified GC method using a direct injection port and a Chromosorb W column was investigated for trace benzene analysis.
  • Optimization of purge flow (5% of total flow) minimized peak tailing caused by water in the organic phase.
  • The method achieved a minimum detectable limit of 4 µg/L for benzene, with repeatability (RSD) better than 6% and average recovery of 96.7%.

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Impact:

  • Provides a more accessible and reliable method for monitoring benzene in coastal water environments.
  • Contributes to improved environmental quality assessment and pollution control strategies.
  • Facilitates routine analysis of trace benzene with reduced sample volume and enhanced precision.