Packed in-tube solid phase microextraction with graphene oxide supported on aminopropyl silica: Determination of target triazines in water samples

Autor(es)

De Toffoli, Ana L. ^[1] ; Fumes, Bruno H. ^[1] ; Lancas, Fernando M. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Chem Sao Carlos, Dept Chem, Postal Code 780, BR-13560970 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMIN; v. 53, n. 7, p. 434-440, 2018.
• Citações Web of Science: 7

Resumo

On-line in-tube solid phase microextraction (in-tube SPME) coupled to high performance liquid chromatography and tandem mass spectrometry (HPLC-MS/MS) was successfully applied to the determination of selected triazines in water samples. The method based on the employment of a packed column containing graphene oxide (GO) supported on aminopropyl silica (Si) showed that the extraction phase has a high potential for triazines extraction aiming to its physical-chemical properties including ultrahigh specific surface area, good mechanical and thermal stability and high fracture strength. Injection volume and loading time were both investigated and optimized. The method validation using Si-GO to extract and concentrate the analytes showed satisfactory results, good sensitivity, good linearity (0.2-4.0 mu g L-1) and low detection limits (1.1-2.9 ng L-1). The high extraction efficiency was determined with enrichment factors ranging from 1.2-2.9 for the lowest level, 1.3-4.9 intermediate level and 1.2-3.0 highest level (n = 3). Although the analytes were not detected in the real samples evaluated, the method has demonstrated to be efficient through its application in the analysis of spiked triazines in ground and mineral water samples. (AU)

• 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
• 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