TY - JOUR
T1 - Determining the pH of 15-60 micron radius water droplets: A direct fluorescence probe
AU - Gatherer, Robert
AU - Reid, Jonathan
PY - 2002/5/3
Y1 - 2002/5/3
N2 - We demonstrate that the fluorescence spectrum from water droplets containing the dye acridine can be used to accurately determine the pH of droplets in the radius range 15-60 mum and in the pH range 3-10. Using a laser pump wavelength of 355 nm and probing the fluorescence with a 0.5 m spectrograph and CCD detector. the particle size parameters are sufficiently large in this radius range that the fluorescence spectrum conforms to that of the bulk phase, permitting a direct unambiguous determination of droplet pH. This could provide a sensitive method for studying directly the uptake of acidic or basic reagents on aerosol droplets. (C) 2002 Published by Elsevier Science B.V.
AB - We demonstrate that the fluorescence spectrum from water droplets containing the dye acridine can be used to accurately determine the pH of droplets in the radius range 15-60 mum and in the pH range 3-10. Using a laser pump wavelength of 355 nm and probing the fluorescence with a 0.5 m spectrograph and CCD detector. the particle size parameters are sufficiently large in this radius range that the fluorescence spectrum conforms to that of the bulk phase, permitting a direct unambiguous determination of droplet pH. This could provide a sensitive method for studying directly the uptake of acidic or basic reagents on aerosol droplets. (C) 2002 Published by Elsevier Science B.V.
UR - http://www.scopus.com/inward/record.url?scp=0037012875&partnerID=8YFLogxK
U2 - 10.1016/S0009-2614(02)00539-0
DO - 10.1016/S0009-2614(02)00539-0
M3 - Article
VL - 357
SP - 153
EP - 160
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 1-2
ER -