Home of the "DGA"

Providing products and services for the Dissolved Gas Analyzer

The Bay Instruments DGA is a customized membrane inlet mass spectrometer designed for high precision and rapid analysis of dissolved air gases in natural water samples.  

Contact:            Todd Kana                                   410 924-3507

                          Bay Instruments                          410 770-9570 fax

                          6180 Waterloo Dr.

                          Easton, MD  21601 USA             kana@bayinstruments.com

 

                          Link to Todd’s faculty website                         

Origin and Mission

 Bay Instruments was established to assist researchers in acquiring the MIMS capability developed by Todd Kana and colleagues at Horn Point Laboratory of the University of Maryland.  Our focus is on rapid, very high precision measurement of the dissolved air gases, nitrogen, oxygen and argon, for applications in aquatic denitrification and system metabolism.  Bay Instruments sells complete systems and specialized inlets along with providing application expertise and assistance.

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Capabilities of the DGA

· Detects air gases in water including stable isotopically labeled gases.

· Direct measurement of dissolved N₂, O₂, and Ar concentrations in environmental water samples.  Does not require headspace equilibration.

· Analysis time of <2 minutes per raw water sample, typical.

· Precision of dissolved N₂, O₂, and Ar measurements (triplicate samples): 0.2%.

· Precision of gas ratio (N₂/Ar and O₂/Ar) measurements (triplicate samples): 0.03%.

· Automatic recording of dissolved gas data in ‘strip chart’ mode. 

· Isotope ratio (¹⁵N/¹⁴N and ¹⁸O/¹⁶O) measurement on dissolved N₂ and O₂.

· Can be applied to CO₂, CH₄, DMS, and other low molecular weight dissolved gases.