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Anal Chem

Title:		Detector for liquid chromatography based on acoustic emissions from an oscillating flame
Author(s):		Thurbide KB; Xia Z;
Address:		"Department of Chemistry, University of Calgary, 2500 University Drive, N.W., Calgary, Alberta, Canada T2N 1N4. thurbide@ucalgary.ca"
Journal Title:		Anal Chem
Year:		2004
Volume:		76
Issue:		18
Page Number:		5459 - 5464
DOI:		10.1021/ac049777r
ISSN/ISBN:		0003-2700 (Print) 0003-2700 (Linking)
Abstract:		"The acoustic flame detector (AFD) is examined as a novel detector for liquid chromatography (LC). It is based upon the acoustic emission frequency of an oscillating hydrogen/oxygen premixed flame and produces a universal response toward organic molecules. A stable frequency near 1000 Hz, which further depends on mobile-phase composition, is achieved for flow rates in the microliter per minute range. The mass flow sensitivity of the AFD demonstrates a linear response over 3 orders of magnitude and a detection limit (S/sigma = 3) of approximately 15 ng of C/s for a series of alcohols. For cyclopentanol, this amounts to an injected mass of approximately 77 ng based on a 0.5-microL injection of a 196 ppm solution in methanol (flow rate 20 microL/min methanol; peak width 30 s). Similar sensitivity is observed using a water mobile phase. Low-frequency (1/f ) noise contributions are dominant with or without mobile phase present. The AFD demonstrates a uniform molar sensitivity toward carbon compounds independent of their optical properties or volatility. Results suggest the device might serve as a simple, inexpensive universal LC detector"
Keywords:
Notes:		"PubMed-not-MEDLINEThurbide, Kevin B Xia, Zhongpeng eng 2004/09/15 Anal Chem. 2004 Sep 15; 76(18):5459-64. doi: 10.1021/ac049777r"