Capillary zone electrophoresis (CZE) of unmodified gold nanoparticles (Au NPs) was investigated in terms of dispersion stability in a presence of buffering counter-ions in background electrolyte (BGE). Capillary length, migration time and electric field strength were identified among factors influencing particles CZE. Moreover, BGE electrolysis was found to significantly affect analyses repeatability. The adsorption of NPs to capillary wall was recognized as the main problem. It was shown that this inconvenience can be overcome by the application of relatively big counter-ions. According to this observation, steric stabilization of NPs suspension by BGE components during CZE was hypothesized. In result, repeatable CZE of bare Au NPs under dynamic coating conditions was shown.

在背景电解质（BGE）中存在缓冲抗衡离子的情况下，根据分散稳定性研究了未修饰金纳米颗粒（Au NPs）的毛细管区带电泳（CZE）。毛细管长度，迁移时间和电场强度是在影响颗粒CZE的因素中确定的。此外，发现BGE电解会显着影响分析的可重复性。NPs在毛细管壁上的吸附被认为是主要问题。结果表明，可以通过使用较大的抗衡离子来克服这种不便。根据该观察结果，假设了CZE过程中BGE组分对NPs悬浮液的空间稳定性。结果，显示了在动态涂覆条件下裸金纳米颗粒的可重复CZE。