PETREL Membrane Inlet Mass Spectrometer
- Direct measurement of dissolved N2, O2, and Ar concentrations in environmental water samples
- Small sample sizes (3+ ml)
- Does not require headspace equilibration
- Analysis time of 90 seconds per raw water sample, typical
- Precision of dissolved N2, O2, and Ar measurements (triplicate samples): 0.1%
- Precision of gas ratio (N2/Ar and O2/Ar) measurements (triplicate samples): 0.03%
- Detects stable isotopes
- Automated inlet valves
- Automatic recording of dissolved gas trends in ‘strip chart’ mode
- Can be applied to CO2, CH4, DMS, and other low molecular weight dissolved gases