Towards real-time quantification of seawater composition using laser-induced breakdown spectroscopy
Towards real-time quantification of seawater composition using laser-induced breakdown spectroscopy
复制标题
使用激光诱导击穿光谱实时定量海水成分
DOI：
10.1109/oceans-genova.2015.7271743
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
K. Ohki
中科院分区：
文献类型：
--
作者：
Takumi Sato;B. Thornton;Tomoko Takahashi;T. Sakka;T. Ohki;K. Ohki
激光诱导击穿光谱（LIBS）正在研究作为一种技术，在现场进行多元素化学分析的液体在海上。本研究的目的是开发一种方法来量化的离子浓度溶解在海水中使用LIBS。LIBS信号遭受拍摄到拍摄的变化，这往往限制了它们的应用，定性或半定量分析。在这项工作中，我们研究了激光能量波动对LIBS光谱的影响，作为这种不稳定性的可能原因，并使用LIBS设备进行实验，该设备已被修改为记录每个激光脉冲的能量沿着光谱测量。实验表明，所观察到的每个元素的LIBS光谱的强度是成比例的激光脉冲的能量在波动的范围内，并根据研究结果，我们提出了一种方法，以提高LIBS测量的稳定性，使用共注册的激光脉冲能量作为过滤标准。使用15个人工海水和热液喷口流体样品含有溶解离子在不同浓度下产生的校准曲线的线性显着改善，我们证明，所提出的方法可以提高LIBS应用于海洋液体的定量性能。
Laser-Induced Breakdown Spectroscopy (LIBS) is being investigated as a technique to perform in situ multielement chemical analysis of liquids at sea. The purpose of this study is to develop a method to quantify the concentration of ions dissolved in seawater using LIBS. LIBS signals suffer from shot-to-shot variations which often limit their application to qualitative or semi-quantitative analysis. In this work, we investigate the effects of fluctuations in laser energy on LIBS spectra as a possible cause for this instability, and perform experiments using a LIBS device that has been modified to register the energy of each laser pulse along with the spectral measurements. The experiments demonstrate that the intensity of the LIBS spectra observed for each element are proportionate to energy of the laser pulse of over the range of fluctuation, and based on the findings, we propose a method to improve the stability of LIBS measurements using co-registered laser pulse energy as a filtering criterion. Significant improvements in the linearity of calibration curves generated using 15 artificial seawater and hydrothermal vent fluid samples containing dissolved ions at various concentrations are achieved, and we demonstrate that the proposed method can improve the quantitative performance of LIBS for application to oceanic liquids.
影响因子：
3
作者：
Okamura, K;Kimoto, H;Nozaki, Y
通讯作者：
Nozaki, Y
影响因子：
4
作者：
Sakka, T;Oguchi, H;Ohba, H
通讯作者：
Ohba, H