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Optical parametric oscillator-based lasers for analytical atomic spectrometry: Laser excited atomic fluorescence; resonant laser ablation-atomic emission; and laser atomic absorption.

机译：用于分析原子光谱法的基于光学参量振荡器的激光器：激光激发的原子荧光；共振激光烧蚀原子发射；和激光原子吸收。

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摘要

This dissertation describes some applications of an optical parametric oscillator (OPO) laser in analytical atomic spectrometry. New types of tunable solid-state lasers are reviewed, in Chapter 2, with respect to their principles and characteristic parameters for analytical atomic spectral applications. Then, in Chapter 3, a new commercial OPO laser system is described based on an extraordinary resonance design and experimental results demonstrate its usefulness for the applications in atomic spectrometry. It had a wide tuning range of 225--1680 nm with a narrow spectral linewidth of better than 0.1 cm-1 in the visible spectrum, with high output energy. The slew-scan and continuous scan speeds of the laser were up to 2.5 nm/s and 0.25 nm/s, respectively. A simple, sensitive, and fast method for Sequential Multielement Laser Excited Atomic Fluorescence Spectrometric (LEAFS) analysis of coal for lithium, sodium and strontium was realized by use of the rapid slew-scan speed of the optical parametric oscillator laser. In Chapter 4, the same OPO laser was further used in electrothermal atomization (ETA) LEAFS for the determination of lead in samples of paint by slurry sampling. The high sensitivity and wide linear calibration range of ETA-LEAFS have made multiple dilutions of samples unnecessary, and allowed the analysis of samples with a wide range of analyte concentration.;Chapter 5 was devoted to resonant laser ablation (RLA) of molybdenum from a standard steel sample into a microwave induced plasma (ICP) for detection by atomic emission. Compared to conventional non-resonant ablation, the RLA signals were enhanced by factors of greater than five, and the resultant spectra were simpler, which may result in reduced spectral interferences in real sample analysis. Based on the experimental observations, some possible mechanisms of RLA were proposed to begin the process to better understand and make use of RLA.;Finally, Chapter 6 describes a preliminary study of OPO Laser Atomic Absorption Spectrometry (OPO-LAAS). Results are presented that illustrate saturation broadening of the atomic profile of sodium, and the linear range of the calibration curves at the center and wings of the atomic spectral profile. In addition, possible applications of OPO-LAAS are discussed.
机译：本文介绍了光学参量振荡器（OPO）激光器在原子分析中的一些应用。在第2章中，对新型可调谐固态激光器进行了概述，介绍了其用于分析原子光谱应用的原理和特征参数。然后，在第3章中，基于非凡的共振设计描述了一种新型的商用OPO激光系统，实验结果证明了其在原子光谱学中的应用。它具有225--1680 nm的宽调谐范围，在可见光谱中的窄光谱线宽优于0.1 cm-1，具有高输出能量。激光器的斜扫描和连续扫描速度分别高达2.5 nm / s和0.25 nm / s。通过使用光学参量振荡器激光器的快速回转扫描速度，实现了一种用于煤中锂，钠和锶的连续多元素激光激发原子荧光光谱分析（LEAFS）的简单，灵敏，快速的方法。在第4章中，将同一OPO激光器进一步用于电热雾化（ETA）LEAFS中，以通过浆液采样测定油漆样品中的铅。 ETA-LEAFS的高灵敏度和宽线性校准范围使样品的多次稀释变得不必要，并允许分析范围广泛的分析物浓度的样品。第5章专门研究了共振激光烧蚀钼（RLA）的方法。将标准钢样品放入微波感应等离子体（ICP）中，以原子发射进行检测。与传统的非共振消融相比，RLA信号增强了五倍以上，并且得到的光谱更简单，这可以减少真实样品分析中的光谱干扰。在实验观察的基础上，提出了一些可能的RLA机制，以更好地理解和利用RLA。最后，第6章对OPO激光原子吸收光谱法（OPO-LAAS）进行了初步研究。给出的结果说明了钠原子分布的饱和展宽，以及在原子光谱分布的中心和两侧的校准曲线的线性范围。此外，还讨论了OPO-LAAS的可能应用。

著录项

  • 作者

    Hou, Xiandeng.;

  • 作者单位

    University of Connecticut.;

  • 授予单位 University of Connecticut.;
  • 学科 Chemistry Analytical.;Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 1999
  • 页码 206 p.
  • 总页数 206
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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