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图 1 LIBS实验装置示意图
Figure 1. Schematic diagram of LIBS system
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图 2 强酸性废水样品的固化预处理流程
Figure 2. Curing pretreatment process for strongly acidic wastewater samples
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图 3 紫外光照对强酸废水固化机理和效果
Figure 3. Mechanism and performance of UV irradiation induced solidification of strongly acidic wastewater
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图 4 LIBS分析强酸性水样经凝胶固化后样品的发射光谱
Figure 4. Emission spectrogram of LIBS analysis for gel solidified strongly acidic wastewater
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图 5 凝胶样品表面纳米银颗粒对发射光谱强度的增强效果
Figure 5. Enhancement of the emission spectral intensity by AgNPs on gel sample surface
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图 6 有无纳米银颗粒凝胶固化样品经LIBS烧蚀后表面图像
Figure 6. Crater images of samples with and without AgNPs after LIBS ablation
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图 7 硫酸浓度对样品紫外光照凝胶固化纳米银颗粒增强LIBS的影响
Figure 7. Effect of sulfuric acid concentrations on sample gel curing under UV irradiation and AgNPs enhanced LIBS
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图 8 固化剂浓度的优化
Figure 8. Optimization of curing agent concentrations
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图 9 LIBS系统激光能量和延迟时间对信噪比的影响
Figure 9. Effects of laser energy and delay time on SNR in LIBS system
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图 10 紫外凝胶固化-纳米颗粒增强LIBS对Cu2+、Ni2+ 和Zn2+分析的标准曲线
Figure 10. Standard curves for Cu2+, Ni2+ and Zn2+ analysis with UV irradiation induced gel solidification-nanoparticles enhanced LIBS
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