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在液体荧光法中用激光作激发光源大大提高了检测有机物和无机物的灵敏度。Полуэктов等在以汞灯为激发光源用钛铁试剂为铽的荧光试剂的液体荧光法中,测铽的检测限为4ppt。在同样条件下,他们也观察到了镝和钐的荧光,但由于其强度太弱,不能用于实际分析。在该法中,钛铁试剂与铽形成的二元络合物在紫外光连续照射下,其荧光强度逐渐下降,给测量带来不利影响。本工作同样采用钛铁试剂为荧光试剂,以氮分子激光
In the liquid fluorescence method using a laser as the excitation light source greatly improves the detection of organic and inorganic sensitivity. Полуэктов et al. In the liquid fluorescence method using a fluorescent reagent having the ilmenite reagent as a fluorescent substance with a mercury lamp as an excitation source, the detection limit of terbium is 4 ppt. Under the same conditions, they also observed the fluorescence of dysprosium and samarium, but because of their strength, they were not used for practical analysis. In this method, the fluorescence intensity of the binary complex formed by the ferrotitanium reagent and terbium is gradually decreased under continuous UV light irradiation, which adversely affects the measurement. This work also uses ilmenite reagent as fluorescent reagent, nitrogen molecular laser