Underwater Mass Spectrometry: Developments and Calibration

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Calibration - Instrument Parameters • Physical parameters that affect instrument response: – Detector settings – Filament settings – Membrane geometry – Residual gas – Membrane temperature – Sample velocity Constant during deployment – Hydrostatic pressure Variable during deployment
Laboratory Calibration - Pressure and Concentration • An HPLC pump and back pressure regulator allow control of hydrostatic pressure for pressure calibrations • Two solutions with known gas concentrations are mixed at various ratios to allow for intermediate concentrations and in situ automated calibration
Page 1 and 2: Underwater Membrane Mass Spectromet
Page 3 and 4: In Situ Underwater Membrane Introdu
Page 5 and 6: Membrane Introduction Mass Spectrom
Page 7 and 8: Principle Features of UMS Type Line
Page 9: Membrane Assembly
Page 13 and 14: Calibration Results - Pressure
Page 15 and 16: Field Baseline Determination • Ba
Page 17 and 18: Pre-Deployment Calibration
Page 19 and 20: Lake Maggiore Chemical Surveys O 2
Page 21 and 22: Hillsborough River, February 2007
Page 23 and 24: Hillsborough Deployment Method
Page 25 and 26: Oxygen 3 : 2 1 P M 4 : 1 9 P M 5 :
Page 27 and 28: Carbon Dioxide 204 mmole/kg 3:21 PM
Page 29 and 30: Depth Profiles in The Gulf of Mexic
Page 31 and 32: Depth Profile Data (Florida Shelf)
Page 33 and 34: Depth Profile Data (Miss. Coast) Ar
Page 35 and 36: Benthic Boundary Layer (Georgia Coa
Page 37 and 38: Benthic Boundary Layer (Georgia Coa
Page 39 and 40: Future Plans for Underwater MS •
Page 41 and 42: Ahoy there landlubbers -- it's time
Page 43: Argon Time Series 16 14 Conc. (mmol

Underwater Mass Spectrometry: Developments and Calibration

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