Analytical Sciences
Online ISSN : 1348-2246
Print ISSN : 0910-6340
ISSN-L : 0910-6340
Quasi-Elastic Laser Scattering Method for Monitoring Capillary Wave Frequency at a Water/Nitrobenzene Interface
Satoshi TAKAHASHIAkira HARATATakehiko KITAMORITsuguo SAWADA
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1994 Volume 10 Issue 2 Pages 305-308

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Abstract

A quasi-elastic laser scattering (QELS) method was applied to monitoring the capillary wave frequencies at a water/ nitrobenzene interface. A digital spectrum analyzer was adopted to improve the time resolution of the QELS method. As a result, each power spectrum could be obtained in 1s and saved in an additional 1s. The equipment was checked by monitoring capillary wave frequencies at a water/nitrobenzene interface covered with a monolayer of dipalmitoylphosphatidylcholine (DPPC), i.e. changes of interfacial tension caused by the formation of the monolayer at the interface were detected. The equipment was then applied to a chemical oscillation system. It was found that the interface of the chemical oscillation system was covered with a high density membrane during the chemical oscillation.

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© The Japan Society for Analytical Chemistry
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