Banca de DEFESA: Fernanda do Amaral Luna

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : Fernanda do Amaral Luna
DATE: 24/04/2024
TIME: 08:30
LOCAL: https://meet.google.com/iyk-czfu-tav
TITLE:

Synthesis of magnetic nanoparticles from iron mining waste for a magnetic solid phase extraction of bisphenol a in environmental samples

KEY WORDS:

Magnetic material, endocrine disruptor, sample preparation, HPLC-UV

PAGES: 73
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Química Analítica
SPECIALTY: Análise de Traços e Química Ambiental
SUMMARY:

  In this work, a method was developed for the extraction, identification and quantification of bisphenol A (BPA) in water samples by high-performance liquid chromatography (HPLC-UV). This compound is considered to be an emerging contaminant (EC) belonging to the class of endocrine disruptors (EDs), causing complications to the functions of the endocrine system. A nano-sorbent was synthesized from iron mining tailings and functionalized Fe3O4@SiO2-NH2 and used as an adsorbent material to clean, pre-concentrate and extract the BPA analyte, since it is found at trace levels in aqueous matrices. To optimize sample preparation, the following parameters were evaluated: contact time, type and volume of elution solvent, amount of sorbent, pH and sample volume. The material was synthesized and the analytical method developed was efficient in determining BPA in aqueous matrices, showing a linear range of 80 - 5120 ng mL-1, with a correlation coefficient equal to 0.99 (BPA), with a detection limit equal to 30 ng mL-1 and a quantification limit equal to 80 ng mL-1. The inter-day and intra-day precision and accuracy tests obtained RSD% and RE% values of less than 15%. The analytical method was applied to real samples collected in Córrego do Lenheiro and drinking water (tap) both aqueous sample collections were carried out in the city of São João del Rei, Minas Gerais.

BANKING MEMBERS:
Externo à Instituição - FRANCISCO GUILHERME ESTEVES NOGUEIRA - UFSCAR
Externa à Instituição - Laíse Aparecida Fonseca Dinali
Presidente - 1954071 - MARIA CRISTINA SILVA