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通过离子交换、活性炭吸附、硫酸盐沉淀等步骤，建立了从裂变￣（９９）Ｔｃ￣ｍ发生器洗脱液中分离和测定纯β杂质的方法。化学产额为７０％左右。方法已用于裂变￣（９９）Ｔｃ￣ｍ发生器洗脱液中纯β杂质的常规检定。
Through the steps of ion exchange, activated carbon adsorption and sulfate precipitation, a method was established for the separation and determination of pure β impurities from the fission ~ (99) Tc ~ m generator eluent. Chemical output is about 70%. The method has been used for routine verification of pure beta impurities in fission ~ (99) Tc ~ m generator eluent.