Quantification of ZnSO4 in aqueous solution by liquid-solid matrix transfer and double-pulse laser-induced breakdown spectroscopy

IF 3.8 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy Pub Date : 2025-04-11 DOI:10.1016/j.sab.2025.107215

Peter Gschwandtner , Florian Rudinger , Stefan Trautner , Christoph Ramsauer , Georg Hölzl , Thomas Röder , Johannes D. Pedarnig

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Abstract

The concentration of zinc sulfate in aqueous solution was measured by double-pulse (DP) laser-induced breakdown spectroscopy (LIBS). ZnSO₄ is an essential chemical in the spin bath liquid used for industrial production of viscose fibers from cellulose. For DP-LIBS the ZnSO₄ analyte was transferred from the water matrix to a solid cellulose matrix (commercial filtration paper). Various emission lines of Zn in the UV/VIS range were measured at 560 different positions on the dried paper sample. The line intensities were strongly varying across the sample as observed by LIBS imaging. Signal analysis revealed broad and bimodal distributions of intensities. Normalization of analyte intensities to emission lines from the matrix reduced the apparent inhomogeneity of samples and achieved monomodal signal histograms and good analytical figures of merit. The mean error of predicted concentration of ZnSO₄ in aqueous solutions was 0.19 g/L (samples with concentration C_ZnSO4 = 0–11 g/L). Applications of DP-LIBS in viscose fiber production is envisaged.

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利用液固基质转移和双脉冲激光诱导击穿光谱定量水溶液中的 ZnSO4

采用双脉冲激光诱导击穿光谱法（LIBS）测定了水溶液中硫酸锌的浓度。ZnSO4是工业用纤维素生产粘胶纤维的纺丝浴液中必不可少的化学物质。对于DP-LIBS， ZnSO4分析物从水基质转移到固体纤维素基质（商用滤纸）。在干燥纸样的560个不同位置测量了紫外/可见光谱范围内锌的各种发射谱线。通过LIBS成像观察到，谱线强度在整个样品中有强烈的变化。信号分析显示信号强度分布广泛且呈双峰分布。将分析物强度归一化到来自矩阵的发射线，减少了样品的明显不均匀性，并获得了单模信号直方图和良好的分析图形。对溶液中ZnSO4浓度的预测平均误差为0.19 g/L（样品浓度为0 ~ 11 g/L）。展望了DP-LIBS在粘胶纤维生产中的应用。

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来源期刊

Spectrochimica Acta Part B: Atomic Spectroscopy 物理-光谱学

CiteScore

6.10

自引率

12.10%

发文量

173

审稿时长

81 days

期刊介绍： Spectrochimica Acta Part B: Atomic Spectroscopy, is intended for the rapid publication of both original work and reviews in the following fields: Atomic Emission (AES), Atomic Absorption (AAS) and Atomic Fluorescence (AFS) spectroscopy; Mass Spectrometry (MS) for inorganic analysis covering Spark Source (SS-MS), Inductively Coupled Plasma (ICP-MS), Glow Discharge (GD-MS), and Secondary Ion Mass Spectrometry (SIMS). Laser induced atomic spectroscopy for inorganic analysis, including non-linear optical laser spectroscopy, covering Laser Enhanced Ionization (LEI), Laser Induced Fluorescence (LIF), Resonance Ionization Spectroscopy (RIS) and Resonance Ionization Mass Spectrometry (RIMS); Laser Induced Breakdown Spectroscopy (LIBS); Cavity Ringdown Spectroscopy (CRDS), Laser Ablation Inductively Coupled Plasma Atomic Emission Spectroscopy (LA-ICP-AES) and Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS). X-ray spectrometry, X-ray Optics and Microanalysis, including X-ray fluorescence spectrometry (XRF) and related techniques, in particular Total-reflection X-ray Fluorescence Spectrometry (TXRF), and Synchrotron Radiation-excited Total reflection XRF (SR-TXRF). Manuscripts dealing with (i) fundamentals, (ii) methodology development, (iii)instrumentation, and (iv) applications, can be submitted for publication.