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ID 47038
file
creator
Yamauchi, Kunihiro
Kitamura, Noboru
subject
Laser trapping
Raman spectroscopy
aerosol
NDC
Chemistry
abstract
Noncontact levitation in air of single micrometer-sized water droplets containing ammonium sulfate was successful by a laser trapping technique. The trapping laser beam was also used simultaneously as an excitation light source for the Raman spectroscopy of trapped droplets. Raman scattering of the symmetric stretching vibration of the SO42− anion and the OH stretching vibrations of H2O were observed at 980 and 3420 cm−1, respectively. The intensity ratio of these two Raman peaks was linearly proportional to the ammonium sulfate concentration in water. Therefore, the in situ quantification of ammonium sulfate in single aerosol droplets was achieved by means of laser trapping and Raman spectroscopy. To the best of our knowledge, this study is the first experimental observation of the independence of ammonium sulfate concentrations of aerosol water droplets to those of the mother solutions under constant relative humidity conditions.
description
This research was supported by JST, PRESTO and Grand-in-Aid for Scientific Research (A) (No. 23245015) from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan.
journal title
Analytical Sciences
volume
Volume 29
issue
Issue 12
start page
1223
end page
1226
date of issued
2013-12
publisher
The Japan Society for Analytical Chemistry
issn
0910-6340
1348-2246
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
2013 © The Japan Society for Analytical Chemistry
relation url
department
Graduate School of Science