|
|
|
|
|
| Simon,Brigitta; Hancu,Gabriel; Gyéresi,Árpád. |
| The applicability of capillary electrophoresis for the analysis of four extensively used penicillin derivatives (benzylpenicillin, ampicillin, amoxicillin, oxacilllin) has been studied. Because of structural similarities, the electrophoretic behavior of these derivatives is very similar; consequently an efficient separation using the conventional capillary zone electrophoresis is hard to be achieved. Their simultaneous separation was solved by using micellar electrokinetic capillary chromatography, the separation being based on the differential partition of the analytes between the micellar and aqueous phase. Using a buffer solution containing 25 mM sodium tetraborate and 100 mM sodium dodecyl sulfate as surfactant, at a pH of 9.3, applying a voltage of +... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Penicillin/derivatives/stability study; Capillary electrophoresis/drugs analysis. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502014000300521 |
| |
|
|
| Papp,Lajos Attila; Gyéresi,Árpád; Hancu,Gabriel; Mircia,Eleonora; Kelemen,Hajnal. |
| A generic capillary zone electrophoresis method was developed for the analysis of four proton pump inhibitors: omeprazole, pantoprazole, lansoprazole and rabeprazole. During preliminary analysis screening of phosphate buffers at different pH levels was performed, in order to determine the optimum pH domain suitable for the simultaneous determination of all studied compounds. A face centered central composite design was employed for the optimization of separation conditions. The effect of buffer concentration, pH and applied voltage was studied; resolution between peaks and migration time of the last compound were considered as responses. Other factors as system temperature, injection parameters, capillary length, were held constant during the optimization... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Capillary electrophoresis; Proton-pump inhibitors; Experimental design. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502019000100534 |
| |
|
|
|
