title: Spectral characterization of biological aerosol particles using two-wavelength excited laser-induced fluorescence and elastic scattering measurements.
abstract: A two-wavelength laser-induced fluorescence (LIF) instrument has been developed and used to characterize individual biological aerosol particles, including biological warfare (BW) agent surrogates. Fluorescence in discrete spectral bands from widely different species, and also from similar species under different growth conditions were measured and compared. The two-wavelength excitation approach was found to increase discrimination among several biological materials, and especially with respect to diesel exhaust particles, a common interferent for LIF BW detection systems. The spectral characteristics of a variety of biological materials and ambient air components have been studied as a function of aerosol particle size and incident fluence.
authors: Optical Sciences Division, Naval Research Laboratory, Washington, DC 20375, USA. vasanthi.sivaprakasam@nrl.navy.mil
authors: Vasanthi
authors: V
authors: Sivaprakasam
authors: Horn-Bond
authors: HB
authors: Lin
authors: Alan L
authors: AL
authors: Huston
authors: Jay D
authors: JD
authors: Eversole
mesh_terms: D000336:Aerosols / Q000032:analysis*; D000393:Air Pollutants / Q000032:analysis*; D001272:Atmosphere / Q000737:chemistry; D001704:Biopolymers / Q000032:analysis*; D004784:Environmental Monitoring / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D012031:Refractometry / Q000295:instrumentation*; D013050:Spectrometry, Fluorescence / Q000295:instrumentation*
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D001704:Biopolymers