Furushima K, Shinagawa M
Radioisotopes. 1981 Jun;30(6):299-304.
The electrophoresis of 226Ra and it's decayed nuclides was carried out by using hydrochloric acid in the positive electrode cell and aqueous solution of potassium fluoride in the negative electrode cell. Experimental factors, i.e. concentrations of potassium fluoride and hydrochloric acid, intensity of electric field, duration for electrophoresis and pH value of the potassium fluoride solution etc. were examined. The sample solution was of 0.01 M hydrochloric acid with a tracer amount of 226Ra and 210Pb. Each of these nuclides was carrier free and was 4GB1/l(1 muCi/ml) in concentration. For the sake of autoradiography, a photoengraving film (Fujilith Ortho Film, TAC = 135) was made use of examining the locations of the separated radioactive bands obtained on the paper strip. Their beta and gamma radioactivities were detected as the film darkening on developing the film. According to the positions thus detected, the strip filter paper was cut into pieces and the species of radionuclides were determined by the measurements of energies and half-lives on beta and gamma rays. The locations of the separated alpha-radionuclides were decided by etching the surface of it's film with 6 M aqueous solution of sodium hydroxide and the species of radionuclides were determined by the solid state alpha-track detection method. As the result, the optimum conditions for the separation are to use 0.01 M hydrochloric acid in the positive cell and 0.005 M potassium fluoride of pH 6.2 in the negative cell, intensity of the applied electric field being 1000 V/30 cm, and electrophoresis time being 20 minutes. The proposed method gave good results for focusing and separating the radium series nuclides. Bands of 210Bi and 210Po were found on the positive electrode side, while the bands of 226Ra and 210Pb (containing 214Pb) were on the negative electrode side.
利用正极池中盛盐酸、负极池中盛氟化钾水溶液的方法对镭 - 226及其衰变核素进行电泳。考察了实验因素，即氟化钾和盐酸的浓度、电场强度、电泳持续时间以及氟化钾溶液的pH值等。样品溶液为含微量镭 - 226和铅 - 210的0.01 M盐酸溶液。这些核素均无载体，浓度为4GBq/l(1μCi/ml)。为进行放射自显影，使用光刻胶片（富士光刻正色胶片，TAC = 135）来检查纸条上分离出的放射性带的位置。显影后胶片变黑来检测它们的β和γ放射性。根据检测到的位置，将条状滤纸切成小块，通过测量β和γ射线的能量及半衰期来确定放射性核素的种类。通过用6 M氢氧化钠水溶液蚀刻胶片表面来确定分离出的α放射性核素的位置，并采用固态α径迹检测法确定放射性核素的种类。结果表明，分离的最佳条件是正极池中使用0.01 M盐酸，负极池中使用pH值为6.2的0.005 M氟化钾，施加的电场强度为1000 V/30 cm，电泳时间为20分钟。所提出的方法在聚焦和分离镭系核素方面取得了良好的效果。在正极侧发现了铋 - 210和钋 - 210的带，而镭 - 226和铅 - 210（含铅 - 214）的带在负极侧。
