Laser-induced breakdown spectroscopy (LIBS) technology has been widely used in many fields because it can achieve non-contact, fast, real-time, on-site, and multi-element detection. Based on the principle of laser-induced breakdown spectroscopy technology, this paper explores the use of passive Q-switched lasers instead of mainstream active Q-switched lasers. Finally, a simple and portable experimental device was designed for qualitative and quantitative sample analysis of several important elements in compound fertilizer.
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