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首页> 外文期刊>Spectrochimica Acta, Part B. Atomic Spectroscopy >Laser-induced breakdown spectroscopy with multi-kHz fibre laser for mobile metal analysis tasks — A comparison of different analysis methods and with a mobile spark-discharge optical emission spectroscopy apparatus
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Laser-induced breakdown spectroscopy with multi-kHz fibre laser for mobile metal analysis tasks — A comparison of different analysis methods and with a mobile spark-discharge optical emission spectroscopy apparatus

机译：多kHz光纤激光器用于移动金属分析任务的激光诱导击穿光谱法—不同分析方法和移动式火花放电光发射光谱仪的比较

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摘要

The identification and separation of different alloys are a permanent task of crucial importance in the metal recycling industry. Laser-induced breakdown spectroscopy (UBS) offers important advantages in comparison to the state-of-the-art techniques for this application. For LIBS measurement no additional sample preparation is necessary. The overall analysis time is much smaller than for the state-of-the-art techniques. The LIBS setup presented in this study enables mobile operation with a handheld probe for the analysis of metallic materials. Excitation source is a fibre laser with a repetition rate of 30 kHz and a pulse energy of 1.33 mJ. The compact optical setup allows measurements at almost every point of a sample within 5 ms. The generated plasma light is analysed using a Multi-CCD spectrometer. The broad spectral coverage and high resolution provide an outstanding amount of spectroscopic information thereby enabling a variety of calibration approaches. Using a set of Al-based and a set of Fe-based samples the analytical performance of uni- and multivariate calibrations is evaluated. The same sample sets are analysed with a commercial state-of-the-art spark-discharge optical emission spectrometer allowing an assessment of the achieved results. Even though the possible analytical correctness of the fibre laser based LIBS measurements is found to similar or even better than that of the conventional technique, advantages of the multivariate data evaluation have not yet been realised in the investigations. However, due to the in situ sample preparation and short measurement times, fibre-laser based LIBS offers superior features.
机译：在金属回收行业中，不同合金的鉴定和分离是一项至关重要的永久性任务。与本应用的最新技术相比，激光诱导击穿光谱法（UBS）具有重要的优势。对于LIBS测量，无需额外的样品制备。总体分析时间比最新技术要短得多。本研究中介绍的LIBS设置可通过手持式探针进行移动操作，以分析金属材料。激发源是光纤激光器，其重复频率为30 kHz，脉冲能量为1.33 mJ。紧凑的光学设置允许在5毫秒内对样品的几乎每个点进行测量。使用Multi-CCD光谱仪分析产生的等离子体光。宽广的光谱覆盖范围和高分辨率可提供出色的光谱信息，从而支持多种校准方法。使用一组基于铝的样品和一组基于铁的样品，可以评估单变量和多元校准的分析性能。使用商业上最先进的火花放电光发射光谱仪分析相同的样品组，从而评估获得的结果。尽管发现基于光纤激光器的LIBS测量的可能分析正确性与常规技术相似或什至更好，但在研究中尚未实现多元数据评估的优势。但是，由于原位样品制备和较短的测量时间，基于光纤激光的LIBS提供了卓越的功能。

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