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Through-bottle whisky sensing and classification using Raman spectroscopy in an axicon-based backscattering configuration.
Fleming, Holly; Chen, Mingzhou; Bruce, Graham D; Dholakia, Kishan.
Afiliação
  • Fleming H; SUPA, School of Physics and Astronomy, University of St Andrews, Fife KY16 9SS, UK. kd1@st-andrews.ac.uk.
Anal Methods ; 12(37): 4572-4578, 2020 10 07.
Article em En | MEDLINE | ID: mdl-33001069
ABSTRACT
Non-intrusive detection systems have the potential to characterise materials through various transparent glass and plastic containers. Food and drink adulteration is increasingly problematic, representing a serious health risk as well as an economic issue. This is of particular concern for alcoholic spirits such as Scotch whisky which are often targeted for fraudulent activity. We have developed a Raman system with a novel geometry of excitation and collection, exploiting the beam propagation from an axicon lens, which results in an annular beam at the bottle surface before focusing within the sample. This facilitates the efficient acquisition of Raman signals from the alcoholic spirit contained inside the bottle, while avoiding the collection of auto-fluorescence signals generated by the bottle wall. Therefore, this technique provides a way of non-destructive and non-contact detection to precisely analyse the contents without the requirement to open the bottle.

Texto completo: 1 Base de dados: MEDLINE Idioma: En Revista: Anal Methods Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Reino Unido

Texto completo: 1 Base de dados: MEDLINE Idioma: En Revista: Anal Methods Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Reino Unido