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激光可辨别威士忌真伪

所属:生活杂谈 来源:dailymail 阅读:2705 次 评论:0 条 [我要评论]  [+我要收藏]

小编摘要:激光可辨威士忌真伪?这不是开玩笑!激光不仅能分辨出威士忌的真伪,甚至能识别出威士忌的品牌和产地,仅仅需要一滴就够了!是不是很神奇?

 导读:一束激光便可分辨威士忌的真伪,这是个连苏格兰人都认可的检测方法。用一束激光照过一片沾有酒的透明薄片,科学家们便可根据折射出来的光来判定威士忌的真伪。不仅如此,科学家们还能判断酒的颜色和口感,甚至还能确定酒的牌子,酿造年份等。这一研究已发表于《光学快讯》杂志。

Here's a method of finding counterfeit whisky that any Scotsman can approve of - only a single drop is required, and a laser decides instantly whether the liquid under test is the genuine article.

The test beams a ray of light thinner than a human hair through a transparent chip on which sits some of the precious liquid.

Researchers at the University of St Andrews found that firing light from one optical fibre and collecting it with another allowed them to analyse light scattered from the whisky.

It allows them to work out precisely how much alcohol is in a sample - fake whisky often has less than the required 40 per cent.

But the scientists can also work out colour and texture - and claim they can identify the brand and age of the malt under test, and even which cask a sample came from.

The research, which has been patented and is being presented to industry, was carried out by physicists Praveen Ashok, Kishan Dholakia and Bavishna Praveen.

Mrs Praveen said: 'Counterfeiting is rife in the drinks industry, which is constantly searching for new, powerful and inexpensive methods for liquor analysis.'

'Using the power of light, we have adapted our technology to address a problem related to an industry which is a crucial part of Scottish culture and economy.'

The rapid, easy test could make it far easier to test for counterfeit whiskies both at home and abroad.

Researchers said the method exploits both the fluorescence of whisky and the scattering of light and shift in energy when it interacts with molecules, known as its Raman signature.

Mr Ashok said: 'Whisky turns out to be very interesting. We can not only gather information about the alcohol content but also (about) the colour and texture.'

'These are dictated by the manufacturing process which of course influences greatly the type of whisky people enjoy.'

The group originally used the chip involved in the research to detect 'bioanalytes; in other studies.

Professor Dholakia added: 'It is amazing to think that the technology we are developing for biomedical analysis can also be used to help us enjoy a wee dram.'

The study is being published by the journal Optics Express.

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2011-11-02 17:00 编辑:lilylikelily
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