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Quantitative Analysis of Vacuum Induction Melting by Laser-induced Breakdown Spectroscopy
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Simple method for liquid analysis by laser-induced breakdown spectroscopy (LIBS).

D C Zhang, Z Q Hu, Y B Su

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    |August 17, 2018
    PubMed
    Summary
    This summary is machine-generated.

    A new capillary mode for laser-induced breakdown spectroscopy (LIBS) enhances liquid analysis. This method significantly reduces splashing and pollution, improving the accuracy of elemental quantification in solutions.

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    Area of Science:

    • Analytical Chemistry
    • Spectroscopy

    Background:

    • Laser-induced breakdown spectroscopy (LIBS) is a rapid in situ multi-element analysis technique.
    • LIBS faces challenges in liquid sample analysis due to splashing and contamination issues.

    Purpose of the Study:

    • To introduce and evaluate a novel capillary mode for quantitative elemental analysis of liquids using LIBS.
    • To address the limitations of traditional LIBS methods for liquid samples.

    Main Methods:

    • Utilized a Nd:YAG laser (10 Hz repetition rate) for analyzing sodium chromate (Na2CrO4) solutions.
    • Implemented a capillary mode to contain the liquid sample during laser-induced plasma generation.
    • No sample preparation was required.

    Main Results:

    • The capillary mode significantly reduced liquid splashing and prevented optical component contamination.
    • Quantitative analysis of Cr and Na in solution showed improved accuracy compared to other methods.
    • Excellent linear calibration curves (R² > 0.998) were obtained for Cr and Na.
    • Limits of detection (LODs) were 28.9 mg/L for Cr and 1.0 mg/L for Na.

    Conclusions:

    • The proposed capillary mode offers a practical and simple approach to enhance the accuracy of LIBS elemental analysis in liquids.
    • This method overcomes key technical difficulties associated with LIBS analysis of aqueous solutions.