Varietal discrimination of hop pellets by near and mid infrared spectroscopy

• Tipo: Artigo em Revista Científica Internacional
• Data: 2018

Autores

Machado, JC (Autor) Outra; Faria, MA (Autor) Outra; Ferreira, Isabel (Autor) FFUP; Pascoa, RNMJ (Autor) Outra; Lopes, JA (Autor) Outra

Revista

Título: Talanta

Vol. 180

Páginas: 69-75

ISSN: 0039-9140

Editora: Elsevier

Indexação

ISI Web of Knowledge - 6 Citações

Scopus - 12 Citações

Outras Informações

ID Authenticus: P-00N-MGT

DOI: 10.1016/j.talanta.2017.12.030

Abstract (EN): Hop is one of the most important ingredients of beer production and several varieties are commercialized. Therefore, it is important to find an eco-real-time-friendly-low-cost technique to distinguish and discriminate hop varieties. This paper describes the development of a method based on vibrational spectroscopy techniques, namely near- and mid-infrared spectroscopy, for the discrimination of 33 commercial hop varieties. A total of 165 samples (five for each hop variety) were analysed by both techniques. Principal component analysis, hierarchical cluster analysis and partial least squares discrimination analysis were the chemometric tools used to discriminate positively the hop varieties. After optimizing the spectral regions and pre-processing methods a total of 94.2% and 96.6% correct hop varieties discrimination were obtained for near- and mid-infrared spectroscopy, respectively. The results obtained demonstrate the suitability of these vibrational spectroscopy techniques to discriminate different hop varieties and consequently their potential to be used as an authenticity tool. Compared with the reference procedures normally used for hops variety discrimination these techniques are quicker, cost-effective, non-destructive and eco-friendly.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7