Determination of citrate released from stabilized gold nanoparticles by capillary zone electrophoresis
| Authors | |
|---|---|
| Year of publication | 2018 |
| Type | Article in Periodical |
| Magazine / Source | Chemical Papers |
| MU Faculty or unit | |
| Citation | |
| Web | http://dx.doi.org/10.1007/s11696-017-0291-8 |
| Doi | http://dx.doi.org/10.1007/s11696-017-0291-8 |
| Keywords | INDIRECT UV DETECTION; INDIRECT ABSORBENCY DETECTION; INORGANIC ANIONS; SHELL NANOPARTICLES; MAGNETITE CORE; ORGANIC-ACIDS; QUANTUM DOTS; SEPARATION; ELECTROLYTES; SURFACE |
| Description | In this article, we report a pilot study on release of citrate ions from citrate-stabilized gold nanoparticles by capillary zone electrophoresis. First, a method for determination of citrate released from nanoparticles was developed using 5 mM phthalate buffer pH 6.5 with polybrene capillary inner wall coating. Within these conditions, citrate migrated in 1.8 min and it can be determined with LOD of 7 A mu mol/L using molybdate as the internal standard. The release of citrate was initiated by addition of common MOPS buffer ions used in capillary electrophoresis to nanoparticles samples. Non-linear behavior was found that proves release of citrate from stabilized gold nanoparticles. The release is initiated when 5 mM MOPS is added to nanoparticles' solution. This behavior can partially explain zeta potential change of the nanoparticles from -34 mV in bulk solution to -28 mV in 50 mM MOPS. |