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用美国 Ｂｒｏｋｈａｖｅｎ 公司 Ｚｅｔａ Ｐｌｕｓ 型 Ｚｅｔａ 电位及粒度测量仪和美国 Ｃｏｕｌｔｅｒ 公司 Ｎ４ Ｐｌｕｓ 型超细粒度分析仪对聚丙烯酰胺／ 柠檬酸铝胶态分散凝胶（ Ｃ Ｄ Ｇ） 作了系统研究。确定了胶态分散凝胶由单分散程度相当高，粒径为１００ —６００ｎｍ 的凝胶颗粒所组成； Ｃ Ｄ Ｇ 粒径与聚丙烯酰胺的分子量有关，分子量越大则粒径越大； Ｃ Ｄ Ｇ 粒径受体系中电解质种类和浓度的影响较小，在 Ｃ Ｄ Ｇ 反应体系中凝胶颗粒的粒径基本不受时间、温度及盐的种类的影响。
A polyacrylamide / aluminum citrate colloidal dispersion gel (C D G) was systematically investigated with the Zeta Plus Zeta potential and particle size analyzer from Brokhaven Company of America and the N4 Plus ultrafine particle analyzer from Coulter. It was confirmed that the colloidal dispersion gel was composed of gel particles with a very high degree of monodispersion and a particle size of 100-600 nm. The particle diameter of C D G was related to the molecular weight of polyacrylamide, The particle size of D G was less affected by the type and concentration of electrolyte in the system. The particle size of the gel particles in the C D G reaction system was not affected by the time, temperature and the type of salt.