CAJ | 학술논문

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.
사용자제적액상사류장치측정료함유다충미량금속원소혼합수용액적격광유도격천광보.연구료격광맥충능량화ICCD문연시、문관、증익등대LIBS보선강도화신조비적영향,이제고신조비위표준대실험삼수진행료우화.재우화후적실험삼수하,학정료금속원소Cr,Cd,Fe,Ca,Al,Mn화Pb적분석보선,유실험측정정표곡선득도료각원소적검측한,기수치재0．018 ppm( Ca)도41．231 ppm( Cd)구역내.
Laser-induced breakdown spectroscopy ( LIBS) of trace multi-metal elements in mixed aqueous so-lution were measured by a homemade liquid jet device. The influence of laser pulse energy, ICCD gate delay and width, ICCD gain on signal intensities and signal to noise ratio( SNR) of LIBS were investigated. The experiment parameters were optimized in order to enhance the SNR value. The analysis lines of Cr, Cd, Fe, Ca, Al, Mn, and Pb metal elements were confirmed under the optimum experiment condition. The limits of detection( LOD) of LIBS for these elements were obtained by the measured calibration curves. The measured LOD values range from 0. 018 ppm( Ca) to 41. 231 ppm( Cd).