Through-bottle whisky sensing and classification using Raman spectroscopy in an axicon-based backscattering configuration,Analytical Methods

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Through-bottle whisky sensing and classification using Raman spectroscopy in an axicon-based backscattering configuration
Analytical Methods ( IF 2.7 ) Pub Date : 2020-08-19 , DOI: 10.1039/d0ay01101k
Holly Fleming _{1,

2,

3,

4} , Mingzhou Chen _{1,

2,

3,

4} , Graham D. Bruce _{1,

2,

3,

4} , Kishan Dholakia _{1,

2,

3,

4,

5}

Affiliation

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.

中文翻译：

在基于轴锥的反向散射配置中使用拉曼光谱对瓶装威士忌进行感测和分类

非侵入式检测系统具有通过各种透明玻璃和塑料容器表征材料的潜力。食品和饮料掺假问题日益严重，既构成严重的健康风险，又构成经济问题。对于经常被用于欺诈活动的酒精烈酒，例如苏格兰威士忌，这尤其令人担忧。我们开发了一种具有新颖的激发和收集几何形状的拉曼系统，它利用了轴锥透镜产生的光束传播，从而在聚焦于样品之前在瓶子表面产生了环形光束。这有助于从瓶内所含酒精中有效地获取拉曼信号，同时避免收集瓶壁产生的自发荧光信号。因此，

更新日期：2020-10-02

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