To further improve the detection sensitivity of surface-enhanced laser-induced breakdown spectroscopy (SENLIBS), the number of repeating sample preparations in a fixed area was increased. The trace elements in an aqueous solution were quantitatively analyzed successfully. The results showed that the spectral intensities were strengthened. The limit of detection (LoD) values of Cu, Pb, Cr, and Cd were reduced from 0.072~0.36 to 0.027~0.057 μg/mL by increasing the number of repeating sample preparations from 1 to 8. This demonstrated that quantitative analytical sensitivity of SENLIBS could be improved by repeating sample preparations without increasing the cost of equipment.

为了进一步提高表面增强激光诱导击穿光谱法（SENLIBS）的检测灵敏度，增加了固定区域中重复样品制备的数量。成功定量分析了水溶液中的微量元素。结果表明，光谱强度得到增强。通过将重复样品制备的数量从1增加到8，将Cu，Pb，Cr和Cd的检出限（LoD）值从0.072〜0.36降低至0.027〜0.057μg/ mL。这证明了定量分析的灵敏度可以通过重复样品制备来改善SENLIBS，而不会增加设备成本。