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Molecules

Title:		Alternative Ecosorbent for the Determination of Trihalomethanes in Aqueous Samples in SPME Mode
Author(s):		Sanchez-Duque G; Lozada-Castro JJ; Hara ELY; Grassi MT; Rosero-Moreano M; Rios-Acevedo JJ;
Address:		"Grupo de Investigacion en Ingenieria Hidraulica y Ambiental (GTAIHA), Universidad Nacional de Colombia, Sede Manizales, Carrera 27 64-60, Manizales 170003, Colombia. Grupo de Investigacion en Cromatografia y Tecnicas Afines GICTA, Departamento de Quimica, Facultad de Ciencias Exactas y Naturales, Universidad de Caldas, Calle 65#26-10, Manizales 170004, Colombia. Grupo de Investigacion Estudio de Sistemas Contaminantes, Departamento de Quimica, Facultad de Ciencias Naturales y Exactas, Universidad de Narino, Ciudadela Universitaria Torobajo, Pasto 522020, Colombia. Grupo de Quimica Ambiental, Departamento de Quimica, Universidade Federal do Parana UFPR, Curitiba 83255-976, Brazil. Grupo de Investigacion en Electroquimica y Medioambiente GIEMA, Departamento de Quimica, Universidad Santiago de Cali, Calle 5#62-00, Cali 760032, Colombia"
Journal Title:		Molecules
Year:		2022
Volume:		20221207
Issue:		24
Page Number:		-
DOI:		10.3390/molecules27248653
ISSN/ISBN:		1420-3049 (Electronic) 1420-3049 (Linking)
Abstract:		"A new sorbent material based on modified clay with ionic liquid immobilized into an agarose film was developed as part of this study. It was applied to determine organochlorine pollutants, like disinfection byproducts, through headspace solid-phase microextraction-gas chromatography-electron capture detection (HS-SPME-GC-ECD). The disinfection byproducts determined in this study were used as model molecules because they were volatile compounds, with proven severe effects on human health. Their presence in aquatic environments is in trace concentrations (from pg L(-1) to mg L(-1)). They are classified as emergent pollutants and their determination is a challenge for analytical chemists. The parameters which affected the extraction efficiency, i.e., number and distance between SPME discs, salt concentration, the temperature of extraction, extraction time, and desorption time, were optimized. A wide linear dynamic range of 10-1000 ng mL(-1) and coefficients of determination better than 0.997 were achieved. The limits of detection and the limits of quantitation were found in the ranges of (1.7-3.7) ng mL(-1) and (5.6-9.9) ng mL(-1), respectively. The precision, expressed as relative standard deviation (RSD), was better than 8%. The developed sorbent exhibits good adsorption affinity. The applicability of the proposed methodology for the analysis of trihalomethanes in environmental and water samples showed recoveries in the range of 86-95%. Finally, the newly created method fully complied with the principles of green chemistry. Due to the fact that the sorbent holder was made of agarose, which is a wholly biodegradable material, sorbent clay is a widespread material in nature. Moreover, the reagents intercalated into the montmorillonite are new green solvents, and during the whole procedure, low amounts of organic solvents were used"
Keywords:		"Humans *Solid Phase Microextraction/methods Trihalomethanes/analysis Clay Sepharose Water/analysis Solvents/analysis *Water Pollutants, Chemical/analysis Reproducibility of Results binding layer ecomaterial ionic liquid mineral clay;"
Notes:		"MedlineSanchez-Duque, Gustavo Lozada-Castro, Juan Jose Hara, Emerson Luis Yoshio Grassi, Marco Tadeu Rosero-Moreano, Milton Rios-Acevedo, Jhon Jairo eng Switzerland 2022/12/24 Molecules. 2022 Dec 7; 27(24):8653. doi: 10.3390/molecules27248653"