Determinación electroquímica de vanadio y tungsteno en aguas con electrodos serigrafiados modificados con nanomateriales y enzimas

  1. Ana Lorena Alvarado Gámez
Supervised by:
  1. Julia Arcos Martínez Director

Defence university: Universidad de Burgos

Year of defence: 2016

Committee:
  1. Ana Crsitina Mendes Dias Cabral Chair
  2. María Asunción Alonso Lomillo Secretary
  3. Carlos león Rojas Committee member
  4. Evaristo Antonio Ojalvo Sánchez Committee member
  5. Agustina Guiberteau Cabanillas Committee member
Department:
  1. Química

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%.