In general, with the increase in NaCl content, the signal intensity of the three spectral lines of Pb first showed a trend of being approximately unchanged and then significantly decreased, which mainly might be due to the dilution of the target element concentration, indicating that adding a small amount of NaCl can achieve a significant increase in signal intensity for the three spectral lines of Pb.
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Quantitative Analysis of Pb in Soil Using Laser-Induced Breakdown Spectroscopy Based on Signal Enhancement of Conductive Materials.
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