Determinación electroquímica de vanadio y tungsteno en aguas con electrodos serigrafiados modificados con nanomateriales y enzimas
- Alvarado Gamez, Ana Lorena
- Julia Arcos Martínez Director
Defence university: Universidad de Burgos
Fecha de defensa: 08 February 2016
- Ana Crsitina Mendes Dias Cabral Chair
- María Asunción Alonso Lomillo Secretary
- Carlos león Rojas Committee member
- Evaristo Antonio Ojalvo Sánchez Committee member
- Agustina Guiberteau Cabanillas Committee member
Type: Thesis
Abstract
They were developed four amperometric biosensors to determine vanadium and tungsten as emergent contaminants in water by means of alkaline phospahatse inhibition from this metals, using riboflavine-5-monophosphate and p-nitrophenyl phosphate as substrates for vanadium, and alkaline phosphatase and 2-phospho-L-ascorbic acid, and laccase catechol respectivelly for tungsten determination. They were used modified SPCEs with AuNPs and laccase enzyme, also with SAMS from 3-mercaptopropionic acid and MWCNTs. It was evaluated the performance of the developed biosensors such as LOD between 3.9 M y 0.18 M, repeatability and reproducibility between 8% and 2% as RSD, accuracy with SRM standards and trueness with enriched water samples, with recoveries between 98% and 102%.