Unbreakable solid-phase microextraction fibers obtained by sol-gel deposition on titanium wire

• Tipo: Artigo em Revista Científica Internacional
• Data: 2006

Autores

Azenha, MA (Autor) FCUP; Nogueira, PJ (Autor) Outra; Silva, AF (Autor) FCUP

Revista

Título: Analytical Chemistry

Vol. 78

Páginas: 2071-2074

ISSN: 0003-2700

Editora: American Chemical Society

Indexação

ISI Web of Knowledge - 115 Citações

Scopus - 121 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-004-MQR

DOI: 10.1021/ac0521246

Abstract (EN): Solid-phase microextraction commercial fibers present a few drawbacks such as relatively low recommended operating temperature, instability and swelling in organic solvents, breakage of the fiber, stripping of coatings, and bending of the needle. Some of these problems have been obviated by covalent bonding of the polymer phase to the fused-silica substrate by sol-gel, but the easy breakage of the fiber remains a problem. In the present work, the known occurrence of titanol groups at the surface of titanium wire was exploited to produce sol-gel fibers supported on this unbreakable substrate. Scanning electron microscopy analysis revealed the film formation on titanium wire surface while temperature and solvent stability as well as durability tests showed that the sol-gel film was tightly attached to the substrate, thus suggesting covalent bonding. The use of this type of fiber is currently generalized in our laboratory without any breakage or stripping out incidents up to the moment.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 4