Adding sodium dodecylsulfate to the running electrolyte enhances the separation of gold nanoparticles by capillary electrophoresis

Capillary electrophoresis coupled with inductively coupled mass spectrometry as an alternative to cloud point extraction based methods for rapid quantification of silver ions and surface coated silver nanoparticles

“…A pH value of 9.5 was selected to take advantage of the strong electroosmotic flow (EOF) at this condition, which can increase the net migration speed of analytes and effectively reduce the analysis time. Several types of surfactants were found to be helpful in stabilizing nanoparticles in buffer solution and assist the separation [10,18,23]. In this study, we focused on separating Ag + from Ag NPs and quantitatively determine the concentration of each species through a rapid analysis.…”

Analysis of engineered nanomaterials in complex matrices (environment and biota): General considerations and conceptual case studies

“…Traditional liquid chromatography techniques such as size exclusion chromatography or ion exchange chromatography are not amenable to separating nanoparticles. Because of the low charge of nanoparticles relative to similarly sized biomolecules, nonspecific interactions with the stationary phase typically result in strong interactions or irreversible binding [58]. Techniques that lack a stationary phase, such as FFF techniques or capillary electrophoresis, are promising, especially when combined with a sensitive element-specific detector (ICP-MS) [57,59].…”

Application of capillary zone electrophoresis for separation of water‐soluble gold monolayer‐protected clusters

“…For instance, it has been employed to separate Au [32,33,35,38,39,43], Ag [40,42], Au/Ag (core/ shell) [46], silicate nanoparticles [37], latex and polystyrene particles [29,30,36,44], and other metal oxides particles [31,34]. However, most of them were focused on the separation of larger core nanoparticles (diameter .5 nm) [29-34, 36-42, 44, 46] rather than MPCs, or the mixture [29-31, 34, 36, 37, 41]/two-component mixture [38,39,44,47] of commercial available nanoparticles rather than real sample of polydisperse product of nanoparticles, or separation of a polydisperse product of nanoparticle with poor resolution [32,33,35,[40][41][42]. In addition, the migration order of nanoparticles in CZE with bare capillary in some reports is quite contradicting whilst some claimed that the earlier-migrating peak was the larger core-size nanoparticles [32,33,36] and others suggested it was the smaller ones [29, 30, 37-39, 41, 42, 46, 47].…”