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J Am Soc Mass Spectrom

Title:		Underwater mass spectrometers for in situ chemical analysis of the hydrosphere
Author(s):		Short RT; Fries DP; Kerr ML; Lembke CE; Toler SK; Wenner PG; Byrne RH;
Address:		"Center for Ocean Technology, College of Marine Science, University of South Florida, St Petersburg 33701-5016, USA. tshort@marine.usf.edu"
Journal Title:		J Am Soc Mass Spectrom
Year:		2001
Volume:		12
Issue:		6
Page Number:		676 - 682
DOI:		10.1016/S1044-0305(01)00246-X
ISSN/ISBN:		1044-0305 (Print) 1044-0305 (Linking)
Abstract:		"Underwater mass spectrometry systems can be used for direct in situ detection of volatile organic compounds and dissolved gases in oceans, lakes, rivers and waste-water streams. In this work we describe the design and operation of (1) a linear quadrupole mass filter and (2) a quadrupole ion trap mass spectrometer interfaced, in each case, with a membrane introduction/fluid control system and packaged for underwater operation. These mass spectrometry systems can operate autonomously, or under user control via a wireless rf link. Detection limits for each system were determined in the laboratory using pure solutions. The quadrupole mass filter system provides detection limits in the 1-5 ppb range with an upper mass limit of 100 amu. Its power requirement is approximately 95 Watts. The ion trap system has detection limits well below 1 ppb, an upper mass limit of 650 amu and MS/MS capability. Its power consumption is on the order of 150 Watts. The present membrane limits analysis to non-polar compounds (<300 amu) with analysis cycles of 5-15 minutes. Deployments of both types of instruments are described, along with a discussion of the challenges associated with in-water mass spectrometry and descriptions of alternative in-water mass spectrometer configurations"
Keywords:
Notes:		"PubMed-not-MEDLINEShort, R T Fries, D P Kerr, M L Lembke, C E Toler, S K Wenner, P G Byrne, R H eng 2001/06/13 J Am Soc Mass Spectrom. 2001 Jun; 12(6):676-82. doi: 10.1016/S1044-0305(01)00246-X"