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制备高比度氚标记化合物的方法主要有催化加氚法,催化卤-氚交换法和催化氢-氚同位素交换法。催化剂本身并不参加化学反应,只在其表面吸附氚气从气相进入液相或固相,改变反应速度,提高标记物的比度。常用的催化剂有钯、铂、铑等过渡金属元素。李志敏的工作证明钯-碳催化剂在催化加氚反应中不仅有催化作用,而且对氢-氚体系而言,还有明显的分离作用。
The main methods for preparing high specific tritium compounds are catalysis plus tritium, catalytic halogen-tritium exchange and catalytic hydrogen-tritium isotope exchange. The catalyst itself does not participate in the chemical reaction, only adsorbed tritium gas from the gas phase into the liquid or solid phase, changing the reaction rate, increase the ratio of markers. Commonly used catalysts are palladium, platinum, rhodium and other transition metal elements. Li Zhimin’s work proves that the palladium-carbon catalyst not only catalyzes the catalytic tritium reaction, but also has obvious separation effect on the hydrogen-tritium system.