使用自制的液相射流装置测定了含有多种微量金属元素混合水溶液的激光诱导击穿光谱.研究了激光脉冲能量和ICCD门延时、门宽、增益等对LIBS谱线强度和信噪比的影响,以提高信噪比为标准对实验参数进行了优化.在优化后的实验参数下,确定了金属元素Cr,Cd,Fe,Ca,Al,Mn和Pb的分析谱线,由实验测定定标曲线得到了各元素的检测限,其数值在0.018 ppm(Ca)到41.231 ppm(Cd)区域内. The laser-induced breakdown spectroscopy of a mixed aqueous solution containing many trace metals was measured by using a homemade liquid-jet device. The effects of laser pulse energy, ICCD gate delay, gate width, gain on LIBS spectral line intensity and signal-to-noise , The experimental parameters were optimized based on the improved signal to noise ratio.The analytical spectra of Cr, Cd, Fe, Ca, Al, Mn and Pb were determined under the optimized experimental parameters, which were determined experimentally The standard curve gives the detection limits for each element in the range 0.018 ppm (Ca) to 41.231 ppm (Cd).