A novel thread-based microfluidic device for capillary electrophoresis with capacitively coupled contactless conductivity detection

Autor(es)

Quero, Reverson Fernandes ^[1] ; Bressan, Lucas Paines ^[1] ; Fracassi da Silva, Jose Alberto ^{[2, 1]} ; de Jesus, Dosil Pereira ^{[2, 1]}

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, UNICAMP, Inst Chem, POB 6154, BR-13083970 Campinas, SP - Brazil

^[2] Inst Nacl Ciencia & Tecnol Bioanalit, Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: SENSORS AND ACTUATORS B-CHEMICAL; v. 286, p. 301-305, MAY 1 2019.
• Citações Web of Science: 3

Resumo

This work describes a novel thread-based microfluidic device to perform capillary electrophoresis separation and capacitively coupled contactless conductivity detection. Polyester threads with a diameter of about 315 mu m were assembled (stretched) in a 3D-printed platform containing solution reservoirs and platinum electrodes. Separation of potassium, sodium, and lithium ions was achieved within 1 min with good peak resolutions and limits of detection close to 1 mu mol L-1. Inversion of the electroosmotic flow direction by adding a cationic surfactant in the running electrolyte was demonstrated. The applicability of the thread-based microfluidic devices was successfully evaluated by the determination of sodium and potassium ions in commercial samples of diet soft drinks. (AU)

• Processo FAPESP: 14/50867-3 - INCT 2014: Instituto Nacional de Ciência e Tecnologia de Bioanalítica
• Beneficiário: Marco Aurelio Zezzi Arruda
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/22127-2 - Desenvolvimento de novos materiais estratégicos para dispositivos analíticos integrados
• Beneficiário: Lauro Tatsuo Kubota
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 18/06478-3 - Aplicação da Técnica de Impressão Direta 3D na Construção de Dispositivos Microfluídicos
• Beneficiário: José Alberto Fracassi da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Regular