Abstract
Heavy metals in soil had great harm to agricultural production and human health. A laser induced breakdown spectroscopy instrument which used spatial confinement to enhance the stability and intensity of the spectrum was designed for heavy metal detection. The instrument had two working methods respectively for quantitative and qualitative analysis. The internal standard method and back- propagation neural network were used for quantitative detection. The relative error was under 12% which was acceptable for rapid measurement of heavy metals in soil. The mobile instrument will be further optimized to improve its detection precision and adapt to the field measurement.
© 2015 Optical Society of America
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