【摘要】 应用激光诱导击穿光谱技术对模拟土壤中Pb进行快速定量分析。该模拟土壤由PbCl2,CaCO3,SiO2,KBr化学纯试剂制备而成。通过实验得到信噪比随延时的增大呈先增后减的变化规律。利用实验光谱图建立了Pb含量的定标曲线。定量分析研究得到:该方法用于Pb含量定量分析的平均相对误差为8.33%,最低检测限为89μg/g。实验结果验证了激光诱导击穿光谱技术用于土壤中Pb含量测量的能力。更多还原

【Abstract】 Fast quantitative analysis of lead in the simulated soil made of chemical reagents(PbCl2,SiO2,CaCO3 and KBr)was carried out with the laser-induced breakdown spectroscopy.The result shows that the signal-to-noise ratio increases and then decreases with the time delay.The calibration curves of Pb content were constructed with the spectrogram acquired in experiments.It is found by the investigation that the average relative error of the method for the fast quantitative analysis of lead in soil is 8.33% and the minimum detection limit is 89 μg/g.The experimental result proves LIBS is capable of being used in the detection of lead in soil.更多还原