Conductometric biosensor for arginine determination in pharmaceutics
| Autor: | Oleksandr O. Soldatkin, T.P. Velychko, M. A. Kuibida, Sergei V. Dzyadevych, O. V. Soldatkina, V. O. Prilipko |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Arginine
Conductometry Biophysics macromolecular substances 02 engineering and technology Biosensing Techniques 01 natural sciences Limit of Detection Electrochemistry Physical and Theoretical Chemistry Detection limit Chromatography Arginase Chemistry 010401 analytical chemistry Osmolar Concentration technology industry and agriculture Reproducibility of Results Membranes Artificial General Medicine 021001 nanoscience & nanotechnology Enzymes Immobilized Urease 0104 chemical sciences Linear range Pharmaceutical Preparations Ionic strength Pharmaceutics 0210 nano-technology Biosensor |
| Zdroj: | Bioelectrochemistry (Amsterdam, Netherlands). 124 |
| ISSN: | 1878-562X |
| Popis: | A new conductometric biosensor based on coimmobilized urease and arginase has been developed for arginine determination in pharmaceutics. First, the main parameters of the selected method of immobilization (concentrations of arginase, urease, and glutaraldehyde, time of incubation) were optimized. An influence of the solution parameters (buffer ionic strength, capacity, pH, Mn2+ concentration) on the biosensor operation was studied, working conditions were optimized. After biosensor optimization, the main analytical characteristics were as follows. The limit of detection - 2.5 μM, the linear range - 2.5–500 μM, the sensitivity to arginine 13.4 ± 2.4 μS/mM, the response time - 20 s. The signals repeatability and operational stability in continuous exploitation were studied over one working day and during one week. Additionally, the selectivity of the developed biosensor towards arginine was essayed relative to other amino acids. The developed biosensor has been used to measure arginine concentrations in some drugs. The results obtained were in high correlation with the characteristics declared by producers. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect