Classification and selective collection of individual aerosol particles using laser-induced fluorescence.
We describe the development and performance evaluation of a system for optical interrogation, subsequent selection, and collection of individual aerosol particles entrained in an inlet air stream. Elastic scatter and laser-induced fluorescence obtained from single particles on-the-fly provide compositional information for classification criteria. Individual particles could then be selectively electrically charged and captured to a conductive substrate with an electric potential. The optical subsystem also includes a novel two-beam velocimeter to provide accurate downstream timing. Good overall quantitative performance values are reported for particles in the size range of 1-8 microm at mean rates up to 4 kHz.
Sivaprakasam
Vasanthi
V
Optical Sciences Division, Naval Research Laboratory, 4555 Overlook Avenue SW, Washington, DC 20375, USA. sivaprak@ccs.nrl.navy.mil
Pletcher
Timothy
T
Tucker
John E
JE
Huston
Alan L
AL
McGinn
Joseph
J
Keller
David
D
Eversole
Jay D
JD
D000336:Aerosols / Q000032:analysis* / Q000737:chemistry*; D000465:Algorithms; D004784:Environmental Monitoring / Q000379:methods*; D017022:Flow Injection Analysis / Q000379:methods*; D007834:Lasers; D010316:Particle Size; D052638:Particulate Matter / Q000032:analysis / Q000737:chemistry; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013050:Spectrometry, Fluorescence / Q000379:methods*
D000336:Aerosols; D052638:Particulate Matter