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Laser Calorimetry Spectroscopy for ppm-level Dissolved Gas Detection and Analysis

Nagapriya, K S and Sinha, Shashank and Prashanth, R and Poonacha, Samhitha and Chaudhry, Gunaranjan and Bhattacharya, Anandaroop and Choudhury, Niloy and Mahalik, Saroj and Maity, Sandip (2017) Laser Calorimetry Spectroscopy for ppm-level Dissolved Gas Detection and Analysis. In: SCIENTIFIC REPORTS, 7 .

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Official URL: http://dx.doi.org/10.1038/srep42917

Abstract

In this paper we report a newly developed technique - laser calorimetry spectroscopy (LCS), which is a combination of laser absorption spectroscopy and calorimetry - for the detection of gases dissolved in liquids. The technique involves determination of concentration of a dissolved gas by irradiating the liquid with light of a wavelength where the gas absorbs, and measuring the temperature change caused by the absorbance. Conventionally, detection of dissolved gases with sufficient sensitivity and specificity was done by first extracting the gases from the liquid and then analyzing the gases using techniques such as gas chromatography. Using LCS, we have been able to detect ppm levels of dissolved gases without extracting them from the liquid. In this paper, we show the detection of dissolved acetylene in transformer oil in the mid infrared (MIR) wavelength (3021 nm) region.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the NATURE PUBLISHING GROUP, MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Depositing User: Id for Latest eprints
Date Deposited: 21 Mar 2017 09:19
Last Modified: 21 Mar 2017 09:19
URI: http://eprints.iisc.ac.in/id/eprint/56401

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