Nanoparticles released from commercial nanosilver spray products

摘要

This research focuses on characterizing nanoparticles released from three different kinds of nanosilver spray products as well as assessing the human exposure risk. Three commercial spray include a surface disinfecting spray and two shoes deodorant spray (labeled as spray A, B, C) with the container volume of 100, 200, 220 ml, respectively. Spray A uses hand-pump dispenser while gas propellant dispensers are used for Spray B and C. A small wind tunnel consists of a long pipe of 10.5 cm (ID) was used for testing nanoparticles released from the spray cans at the flow rate of 400 L/min corresponding to the residence time of 1.3 sec (Figure 1). An ELPI (Elect r ical Low Pressure Impactor, Ver1.2, Dekat i Corp. , Tampere, Finland) was used to the measure aerosol size distribution 1 m away from the spraying source at 1-sec interval. A MOUDI (Micro-Orifice Uniform Deposit Impactor, Model 110, MSP Corp., MN, USA) was also used to sample aerosols simultaneously for 30 minutes.