Sensitive determination of 17β-estradiol in river water using a graphene based electrochemical sensor
| Autor: | Bruno Rafael Orsini Rossi, Ernesto C. Pereira, Maria Carolina Donatoni, Fernando C. Moraes, Kleber T. de Oliveira |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Inorganic chemistry
Oxide Analytical chemistry Biochemistry Analytical Chemistry law.invention chemistry.chemical_compound Rivers law Environmental Chemistry Derivatization Electrodes Chromatography High Pressure Liquid Spectroscopy Detection limit Estradiol Chemistry Graphene Electrochemical Techniques Electrochemical gas sensor Standard addition Electrode Graphite Differential pulse voltammetry Oxidation-Reduction Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Analytica Chimica Acta. 881:37-43 |
| ISSN: | 0003-2670 |
| Popis: | In this study, a novel material for the electrochemical determination of 17β-estradiol using an electrode based on reduced graphene oxide and a metal complex porphyrin has been applied to environmental monitoring. The electrochemical profile of the proposed electrode was analyzed by differential pulse voltammetry, which showed a shift of the oxidation peak potential of 17β-estradiol to 150mV in a less positive direction compared to the bare reduced graphene oxide electrode. DPV experiments were performed in PBS at pH 7.0 to determine 17β-estradiol without any previous step of extraction, cleanup, or derivatization, in the range of 0.1-1.0μmolL(-1) with a detection limit archived at 5.3nmolL(-1) (1.4μgL(-1)). The proposed sensor was successfully applied in the determination of 17β-estradiol in a river water sample without any purification step and was successfully analyzed under the standard addition method. All the obtained results were in agreement with those from the HPLC procedure. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect