Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/18865
Título: Development of a chromatographic low pressure flow injection system using amperometric detection: Application to the analysis of niacin in coffee
Autor: Santos, João Rodrigo
Rangel, António O. S. S.
Palavras-chave: Low pressure chromatography
Flow analysis
Coffee
Vitamin B3
Niacin
Boron Doped diamond electrode
Modified monolithic columns
Data: 2015
Editora: Elsevier
Citação: SANTOS, João Rodrigo; RANGEL, António O. S. S. - Development of a chromatographic low pressure flow injection system using amperometric detection: Application to the analysis of niacin in coffee. Food Chemistry. ISSN 0308-8146. N.º 187 (2015), p. 152–158
Resumo: In this work, an analytical flow system able to perform low pressure chromatography with amperometric detection is presented. As case study, the determination of niacin (vitamin B3) in coffee brewed samples was selected. The manifold comprised a 1.0 cm length monolithic column coated with didecyldimethylammonium bromide, a laboratory-made boron doped diamond electrode, and featured in-line ionic strength adjustment of the mobile phase. The figures of merit concerning the selected case study namely, detection limit, 7.90 10 7 M, determination rate, ca. 10 samples h 1, mobile phase and ISA solution consumption, ca. 2.6 mL per analysis, and CV, below 5% for retention time and peak height, showed the competitiveness of this analytical strategy comparing to the described HPLC methods for niacin determination. The strategy displays a simple configuration, low cost, fast and easy assembling, foreseeing its use to general purpose applications.
Peer review: yes
URI: http://hdl.handle.net/10400.14/18865
DOI: http://dx.doi.org/10.1016/j.foodchem.2015.04.093
Aparece nas colecções:CBQF - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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