Journal
MEASUREMENT SCIENCE AND TECHNOLOGY
Volume 11, Issue 4, Pages 412-417Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-0233/11/4/311
Keywords
thermal diffusivity; thermal effusivity; optical absorption coefficient; photoacoustic cell; thermal-properties measurement; optical-properties measurement; environmental monitoring; trace determination in liquids
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A double-purpose open photoacoustic cell, suitable for optical and thermal characterization of liquid samples is described. An experimental method for the determination of very low concentrations of contaminants in liquid substances is proposed. The proposed technique was used to determine the concentration of Chromium (VI) in water via the measurement of its optical absorption coefficient. To test the suitability of the proposed technique for experimental determination of thermal properties of liquids, studies on ethanol were performed. The agreement between experimentally obtained thermal properties and values reported in the literature is good.
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