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采用Nd∶YAG激光器为激发光源 ,与CCD光学多道分析系统联用建立了多道检测 激光诱导荧光光谱分析装置 ,并对该装置的设计进行了优化 ,荧光光谱测量范围 350～ 10 0 0nm ,波长精度 0 .3nm ,探测器光谱响应灵敏度 0 .1LX。采集和检测了若丹明 6G乙醇溶液的高信噪比荧光谱 ,最低检出限达到 10 - 8mol/L。线性范围为 10 - 6～ 10 - 8mol/L。将所建立的装置用于若丹明B荧光淬灭法测定水中硒的含量 ,获得了满意的结果。方法的线性范围为 1～ 10 μg/L ,检出限为 0 .5μg/L ,加标回收率为 81.3%～ 112 .5%。
Nd: YAG laser as excitation light source, combined with CCD optical multi-channel analysis system to establish a multi-channel detection laser-induced fluorescence spectroscopy device, and the design of the device was optimized, the fluorescence spectrum measurement range of 350 ~ 100nm, Wavelength accuracy of 0 .3nm, detector spectral response sensitivity of 0 .1LX. The high signal - to - noise fluorescence spectrum of rhodamine 6G ethanol solution was collected and tested with the lowest detection limit of 10 - 8 mol / L. The linear range is 10 - 6 ~ 10 - 8mol / L. The established apparatus was used to determine the content of selenium in water by Rhodamine B fluorescence quenching method, and satisfactory results were obtained. The linear range of the method was 1 ~ 10 μg / L, the detection limit was 0.5 μg / L and the recoveries were 81.3% -112.5%.