| Texto completo | |
| Autor(es): |
Borsatto, Joao V. B.
;
Maciel, Edvaldo V. S.
;
Lancas, Fernando M.
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Chromatography A; v. 1685, p. 8-pg., 2022-11-04. |
| Resumo | |
Graphene and graphene-derived substances are cutting-edge materials receiving increasing attention in the analytical chemistry field. Graphene oxide sheets bonded to amino silica particles functionalized with octadecyl (C18) groups and endcapped, also known as SiGO-C18ec, have been successfully employed as extraction phases and in analytical columns associated with conventional liquid chromatography (LC). In this work, SiGO-C18ec particles of 3, 5, and 10 pm nominal id were employed to pack capillary LC columns (100 mm long x 0.3 mm id), and their performance in the gradient mode was evaluated and compared. A 3 pm C18 capillary LC column (50 x 0.3 mm) was used as a reference column. Eight analytes having different polarities and topological surface areas were selected as a probe in this study: carbofuran clomazone, hexazinone, carbamazepine, citalopram, clomipramine, desipramine, and ochratoxin A. Studies about orthogonality were performed to investigate the orthogonality between the SiGO-C18ec and C18 phases. Among the SiGO-C18ec phases investigated, the column packed with 5 pm SiGO-C18ec particles presented the best peak capacity (29) in 15 min. Additionally, the performance of the columns packed with 5 pm SiGO-C18ec particles overcame the performance of the C18 columns used. Significant orthogonality was found between C18 and SiGO-C18ec packed columns; however, no significant differences were found between columns packed with SiGO-C18ec particles of different diameters. (c) 2022 Elsevier B.V. All rights reserved. (AU) | |
| Processo FAPESP: | 17/02147-0 - Cromatografia líquida em uma gota e seu acoplamento com espectrometria de massas: estratégias instrumentais, desenvolvimento de materiais, automatização e aplicações analíticas |
| Beneficiário: | Fernando Mauro Lanças |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 19/22724-7 - Novas estratégias instrumentais no desenvolvimento de métodos analíticos automatizados e miniaturizados para a determinação de compostos orgânicos mediante cromatografia líquida acoplada a espectrometria de massas |
| Beneficiário: | Deyber Arley Vargas Medina |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 14/07347-9 - Desenvolvimento de novos materiais e dispositivos para técnicas miniaturizadas de preparo de amostras na área de segurança alimentar |
| Beneficiário: | Fernando Mauro Lanças |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 15/15462-5 - Emprego do grafeno como material sorvente em técnicas miniaturizadas de preparo de amostra. |
| Beneficiário: | Bruno Henrique Fumes |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |