TY - CONF A1 - Johnson, M A1 - Wang, S A1 - Chen, H T1 - Elemental composition of individual particles with a laser-induced plasma source for mass spectrometry. N1 - R829622 ER - TY - CONF A1 - Johnston, M V T1 - Real-time chemical composition measurements of fine and ultrafine airborne particles. N1 - R829622 ER - TY - CONF A1 - Wang, S A1 - Chen, H A1 - Johnston, M V T1 - Single particle analysis by laser induced plasma formation. N1 - R829622 ER -