| 强度比定标法分析激光诱导击穿碳谱线 |
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| 引用本文： | 姚顺春,陆继东,谢承利,李娉,潘圣华,李捷,刘彦.强度比定标法分析激光诱导击穿碳谱线[J].强激光与粒子束,2008,20(7). |
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| 作者姓名： | 姚顺春 陆继东 谢承利 李娉 潘圣华 李捷 刘彦 |
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| 作者单位： | 1. 华南理工大学 电力学院， 广州 510640； 2. 华中科技大学 煤燃烧国家重点实验室, 武汉 430074 |
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| 摘 要： | 利用激光诱导击穿光谱技术，使样品在大气常压环境下被击穿形成等离子体,探测等离子体发射信号。选择混合样品所含的基体元素硅作为内标元素，分别根据碳谱线峰值强度、分析线和内标线峰值强度比建立不同的定标曲线。对两种定标曲线的拟合度、测量重复性以及定量分析结果准确度进行了研究。研究结果表明:强度比定标法在一定程度上可以提高定标曲线的拟合度和测量重复性，减小强度比定标法定量分析结果的误差，提高测量准确度。
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| 关 键 词： | 激光诱导击穿光谱 强度比 定标曲线 拟合度 测量重复性 准确度 |
| 收稿时间： | 1900-01-01; |
Quantitative analysis of laser induced carbon plasma by intensity ratio calibration |
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| YAO Shun-chun,LU Ji-dong,XIE Cheng-li,LI Ping,PAN Sheng-hua,LI Jie,LIU Yan.Quantitative analysis of laser induced carbon plasma by intensity ratio calibration[J].High Power Laser and Particle Beams,2008,20(7). |
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| Authors: | YAO Shun-chun LU Ji-dong XIE Cheng-li LI Ping PAN Sheng-hua LI Jie LIU Yan |
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| Institution: | 1. Power Electric College, South China University of Technology， Guangzhou 510640, China； 2. State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | Samples were excited by pulse laser and plasma was formed at atmospheric pressure. The technique of laser induced breakdown spectroscopy(LIBS) was applied to analyzing the carbon content in the samples. The matrix element Si was selected as internal standard, calibration curves were drawn respectively using the peak intensity of carbon line and the intensity ratio of carbon line and silica line. The fitting degree of two different calibration curves, signal reproducibility and the accuracy of calibrated values were analyzed. The results of the analysis show that the intensity ratio method seems more adequate than the peak intensity method for establishing the calibration cures. |
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| Keywords: | Intensity ratio Calibration curve Fitting degree Signal reproducibility Accuracy |
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