Laser Calorimetry Spectroscopy for ppm-level Dissolved Gas Detection and Analysis.
Laser Calorimetry Spectroscopy for ppm-level Dissolved Gas Detection and Analysis.
复制标题
DOI：
10.1038/srep42917
复制
发表时间：
2017-02-20
影响因子：
4.6
通讯作者：
Maity S
中科院分区：
文献类型：
--
作者：
K S N;Sinha S;R P;Poonacha S;Chaudhry G;Bhattacharya A;Choudhury N;Mahalik S;Maity S
在本文中，我们报告了一种新开发的技术-激光量热光谱（LCS），这是一个激光吸收光谱和量热法的组合-用于检测溶解在液体中的气体。该技术涉及通过用气体吸收的波长的光照射液体并测量由吸收引起的温度变化来确定溶解气体的浓度。传统上，通过首先从液体中提取气体，然后使用诸如气相色谱法的技术分析气体来进行具有足够灵敏度和特异性的溶解气体检测。使用LCS，我们已经能够检测溶解气体的ppm水平，而无需从液体中提取它们。在本文中，我们展示了在中红外（MIR）波长（3021 nm）区域检测Transformer油中的溶解乙炔。
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.