Method for enriching boron isotope by using resin

The invention relates to a method for enriching boron isotope by using resin, which comprises the following steps: adding the resin into a low-concentration boric acid aqueous solution at 30-50 DEG C, continuously stirring for 4-8 hours to fully adsorb < 11 > B, then adding a certain amount of alkali liquor, and uniformly stirring; adding resin again, continuously stirring for 4-8 hours, adding a certain amount of alkali liquor again, and uniformly stirring; and repeating the steps for 40-50 times to obtain a 10B high-abundance solution. According to the method, the pH value of the boric acid solution is adjusted for multiple times, so that 10B in the solution mainly exists in a tetrahedral coordination form, the adsorption selectivity of the resin is improved, and the boron 10 isotope can be efficiently enriched. 本发明涉及一种利用树脂富集硼同位素的方法，其在30～50℃下，将树脂加入低浓度硼酸水溶液中，持续搅拌4-8h以充分吸附11B，然后加入一定量的碱液，搅拌均匀；再次加入树脂，持续搅拌4-8h，再次加入一定量的碱液，搅拌均匀；如此重复40～50次，获得10B的高丰度溶液。该方法通过多次调节硼酸溶液的pH值，使溶液中10B主要以四面体配位形式存在，提高了树脂的吸附选择性，从而能够高效富集硼10同位素