VII Simposio Internacional de Química 2019 "SIQ 2019" -XII Conferencia "La Ingeniería Química: Desarrollo, potencialidades y sus retos"

VII Simposio Internacional de Química 2019

SIQ 2019

Development of an enzymatic biosensor for determination of glyphosate in environmental samples

Resumen [ES]

: Glyphosate (N- (phosphonomethyl) glycine) is a non-selective broad-spectrum herbicide for weed control. It is used in more than 750 products for agricultural, forestry, urban and domestic use. It is estimated that 6.1 billion kilograms of this product were used worldwide in the last decade. Glyphosate when applied to plants acts by specifically inhibiting the 5-enolpyruvyl shikimate 3-phosphate synthase (EPSPS), an enzyme involved in the production of aromatic amino acids such as tryptophan, phenylalanine and thyroxine. Studies have shown the presence of glyphosate in human blood and urine. However, the World Health Organization considered it a toxicologically harmless compound for humans. This controversy triggered research where they found that this compound has carcinogenic, mutagenic, reprotoxic and disruptive effects of endocrine function (1). Therefore, the importance of the detection of glyphosate in various environmental matrices arises. Thus, it becomes a challenge for the scientific community to determine it, because it is a molecule with low solubility in organic solvents, it does not have chromophores or fluorophores and needs to use derivatization agents, if the detection is by optical processes (2). Therefore, traditional photometric and fluorometric detection methods have limitations that can be overcome by electrochemical processes, in particular by the use of biosensors. The objective of this work is to develop an enzymatic biosensor for the detection of glyphosate with high sensitivity, reduced response time, easy construction and operation to determine this contaminant in environmental samples.

Resumen [EN]

: Glyphosate (N- (phosphonomethyl) glycine) is a non-selective broad-spectrum herbicide for weed control. It is used in more than 750 products for agricultural, forestry, urban and domestic use. It is estimated that 6.1 billion kilograms of this product were used worldwide in the last decade. Glyphosate when applied to plants acts by specifically inhibiting the 5-enolpyruvyl shikimate 3-phosphate synthase (EPSPS), an enzyme involved in the production of aromatic amino acids such as tryptophan, phenylalanine and thyroxine. Studies have shown the presence of glyphosate in human blood and urine. However, the World Health Organization considered it a toxicologically harmless compound for humans. This controversy triggered research where they found that this compound has carcinogenic, mutagenic, reprotoxic and disruptive effects of endocrine function (1). Therefore, the importance of the detection of glyphosate in various environmental matrices arises. Thus, it becomes a challenge for the scientific community to determine it, because it is a molecule with low solubility in organic solvents, it does not have chromophores or fluorophores and needs to use derivatization agents, if the detection is by optical processes (2). Therefore, traditional photometric and fluorometric detection methods have limitations that can be overcome by electrochemical processes, in particular by the use of biosensors. The objective of this work is to develop an enzymatic biosensor for the detection of glyphosate with high sensitivity, reduced response time, easy construction and operation to determine this contaminant in environmental samples.

Sobre el ponente

Célia Amorim

Prof. Célia Amorim

LAQV-REQUIMTE/Departamento de Ciências Químicas, Faculdade de Farmácia – Universidade do Porto, R. Jorge Viterbo Ferreira, 228. 4050-313 Porto Flag of Portugal
Información Práctica
Ponencia
English (US)
No definido
30 minutos
No definido
Autores
Alberto n. araújo
Luis A. Zambrano Intriago
Maria c.b.s.m. montenegro
Joan M. Rodríguez Díaz
Palabras clave
biosensor
electrochemical
food safety
glyphosate
horseradish peroxidase