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Chemical elemental analysis of single acoustic-levitated water droplets by laser-induced breakdown spectroscopy

机译：激光诱导击穿光谱法分析单声升水液滴的化学元素分析

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摘要

Laser-induced breakdown spectroscopy is presented for trace element detection of liquid samples by analyzing a single droplet levitated by ultrasonic waves. A single liquid droplet is placed in the node of a standing acoustic wave produced by a uniaxial levitator for further chemical analysis. The acoustic levitator consists of a commercial Langevin-type transducer, attached to a concave mechanical amplifier, and a concave reflector. A micro-syringe was used to manually place individual liquid droplet samples in the acoustic levitation system. For chemical analysis, a laser-induced plasma is produced by focusing a single laser pulse on the levitated water droplet after it partially dries. The performance of the acoustic levitator on micron-sized droplets is discussed, and the detection of Ba, Cd, Hg, and Pb at parts per million (milligrams/liter) and sub-parts per million levels is reported. The process, starting from placing the sample in the acoustic levitator and ending on the chemical identification of the traces, takes a few minutes. The approach is particularly interesting in applications demanding limited volumes of liquid samples and relative simple and inexpensive techniques. (C) 2018 Optical Society of America.
机译：通过分析通过超声波悬浮的单滴液体来介绍激光诱导的击穿光谱分析液体样品的痕量元素检测。将单个液滴放置在由单轴悬浮器产生的驻地声波的节点中进行进一步的化学分析。声悬浮器由商业LangeVin型传感器组成，附接到凹形机械放大器和凹形反射器。微注射器用于在声学悬浮系统中手动放置单个液滴样品。为了化学分析，通过在部分干燥之后聚焦在悬浮水滴上的单个激光脉冲来产生激光诱导的等离子体。讨论了声悬浮液对微米尺寸液滴的性能，并报告了每百万（毫克/升）和百万分之一的百万分之一的Ba，Cd，Hg和Pb的检测。从放置在声悬浮机中并结束迹线的化学识别时开始的过程需要几分钟。该方法在要求有限的液体样品和相对简单且廉价技术的应用中特别有趣。 （c）2018年光学学会。

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  • 来源
    《Optics Letters》 |2018年第10期|共4页
  • 作者

    Contreras Victor; Valencia Ricardo; Peralta Jairo; Sobral H.; Meneses-Nava M. A.; Martinez Horacio;

  • 作者单位

    Univ Nacl Autonoma Mexico Inst Ciencias Fis Av Univ 2001 Cuernavaca 62210 Morelos Mexico;

    Ctr Invest Opt AC Loma del Bosque 115 Lomas Del Campestre 37150 Leon Mexico;

    Univ Autanoma Estado Morelos Ctr Invest Ciencias Av Univ 1001 Cuernavaca 62209 Morelos Mexico;

    Univ Nacl Autonoma Mexico Ctr Ciencias Aplicadas &

    Desarrollo Tecnol Mexico City 04510 DF Mexico;

    Ctr Invest Opt AC Loma del Bosque 115 Lomas Del Campestre 37150 Leon Mexico;

    Univ Nacl Autonoma Mexico Inst Ciencias Fis Av Univ 2001 Cuernavaca 62210 Morelos Mexico;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 计量学;光学;
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