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本文提出了硫脲树脂分离-中子活化分析测定岩样中微量银的方法。称取样品100mg于小铝罐中,外包铝箔,与标准紧贴打包,于本院重水反应堆中心孔道照射200小时,“冷却”一个月后将样品转移入聚四氟乙烯坩埚中,加HF和HClO_4于电炉上蒸发至不再冒烟,加HNO_3溶解残渣,用蒸馏水稀释至0.5-1N HNO_3介质,以每分钟1ml的流速通过硫脲树脂柱(φ4×100mm)、再用0.5N HNO_3洗涤除去残留的基体放射性核素,将树脂转移入塑料小瓶中,于Ge(Li)γ谱仪测量~(110m)Ag的特征γ射线,用相对比较法求出样品中Ag含量。放射性示踪实
This paper presents a method for the determination of trace silver in rock samples by thiourea resin separation - neutron activation analysis. Weigh the sample 100mg in a small aluminum cans, aluminum foil, closely packed with the standard, in our hospital heavy water reactor center hole irradiation 200 hours, “cooling” one month after the sample was transferred to a polytetrafluoroethylene crucible, plus HF and HClO_4 was evaporated on an electric furnace to no longer smoke. The residue was dissolved in HNO_3, diluted with distilled water to 0.5-1N HNO_3, passed through a thiourea resin column (φ4 × 100 mm) at a flow rate of 1 ml per minute and washed with 0.5 N HNO_3 Residual matrix radionuclide, the resin was transferred into plastic vials, the characteristic γ-ray of ~ (110m) Ag was measured on Ge (Li) γ spectrometer, and the content of Ag in the sample was determined by relative comparison method. Radioactive tracing