Comparing Study of the VOCs in Water Using Portable or Bench-top GC/MS

The methods for portable and bench-top gas chromatography and mass spectrometry (GC/MS) were established to analyze 22 kinds of volatile organic compounds (VOCs) in water. Portable headspace HS-GC/MS, bench-top HS-GC/MS and bench-top purge and trap (P&T)-GC/MS were employed to determine the VOCs in water. The analytic precision，accuracy and limit of detection of three methods were compared. The results show that the bench-top HS-GC/MS and bench-top P&T-GC/MS have excellent precision and accuracy, while the portable HS-GC/MS has lower limit of detection, which can meet the needs for emergency monitoring.