Banca de QUALIFICAÇÃO: ÉRICA BARBOSA DE SOUSA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : ÉRICA BARBOSA DE SOUSA
DATE: 07/06/2021
TIME: 15:00
LOCAL: Google Meet
TITLE:

DEVELOPMENT OF A PAPER-BASED COLORIMETRIC ANALYTICAL DEVICE IN THE QUALITATIVE AND SEMI-QUANTITATIVE DETERMINATION OF THE GLYPHOSATE HERBICIDE

KEY WORDS:

glyphosate, food safety, qualitative analysis, quick analysis

PAGES: 18
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Química Analítica
SPECIALTY: Análise de Traços e Química Ambiental
SUMMARY:

Glyphosate is one of the most used herbicides in the world, with Brazil being the biggest buyer of this product. Due to the high demand for the use of this product and also because of its carcinogenic potential, it is necessary to develop methods for the determination of glyphosate. The available methods are costly, requiring sophisticated devices, training in their use and also the use of often harmful solvents. In this context, this work aims to develop a paper-based colorimetric analytical device for determining the presence of glyphosate that is accessible to the general population or even used as a screening in laboratories that do not have the necessary technology to determine the analyte. Therefore, the use of 5 different types of papers (foil paper, chromatographic paper, cardboard, coffee filter and qualitative paper) will be investigated as a platform for the development of a chemical sensor for the determination of glyphosate. Methodologies for impregnation of the chromogenic reagent dimethylaminocinnamaldehyde (p-DAC) will be evaluated and stability regarding storage temperature and shelf life will also be studied. The chemical characterization of the paper devices will be done by Fourier Transform Infrared Spectroscopy (FTIR) technique. After choosing the ideal paper, a color gradient pattern will be elaborated for the semiquantitative determination of glyphosate and real samples will be analyzed by the proposed device.

BANKING MEMBERS:
Interna - 1681790 - CRISTIANE MARTINS CARDOSO DE SALLES
Interno - 1844240 - CRISTIANO JORGE RIGER
Interna - 1177598 - ROSANE NORA CASTRO
Externo ao Programa - 2630672 - FLAVIO COUTO CORDEIRO
Externo à Instituição - FLAVIO ADRIANO BASTOS