Heriot-Watt checking for fake alcohol

A study at Heriot-Watt University has unearthed details of counterfeit alcoholic spirit production.

Scientists from the International Centre for Brewing and Distilling (ICBD) at Heriot-Watt University, in Edinburgh, working alongside Dr John Edwards of Process NMR Associates, based in New York, are compiling a database to test, compare and log alcoholic spirits.

The research has featured in a paper, titled, Worldwide Illicit and Counterfeit Alcoholic Spirits: Problem, Detection, and Prevention, published in the Journal of the American Society of Brewing Chemists.

The team have spent the last six months using lab-based analytical techniques to detect the chemical fingerprint of hundreds of authentic international spirits, including whisky, tequila, mezcal, and bourbon.

Michael Bryan of the ICBD at Heriot-Watt, is leading the research as part of his PhD project. He said: “Once complete, this database will provide in-depth analysis of hundreds of legitimate spirits, becoming an information source to determine the authenticity of a product.

“At present, testing apparatus, methodology and human resource is ridiculously expensive, costing up to half a million or more pounds. And the analysis machinery is huge, they can be size of a car or bigger. So, it’s a very difficult process and what I want to do is to take a different approach. 

“Let’s transfer the heavy lifting from analytical services to comparative mathematics.”

While counterfeit spirit production is sizeable, the paper acknowledges there is no single solution with tougher legislation and increased fines not proven to be significant deterrents. It highlights the need for the development of low-cost methods to determine the authenticity of a product without the need to physically open a bottle.

Working with Process NMR Associates, the scientists are using a variety of analytical tools including near infrared spectroscopy (NIR), ultra-violet visible (UV-Vis) spectroscopy, liquid chromatography (HPLC-DAD), and nuclear magnetic resonance spectroscopy (NMR) to determine the chemistry of sample spirits.

Michael continued: “By having a database of hundreds of spirits, outlining the legitimacy of a product, we can use less expensive techniques to sample a product. If it doesn’t meet those benchmarks, then we can quickly determine that it requires further analysis.

“This will ultimately save time and resources and ensure that we focus efforts on products that we suspect of being counterfeit.”

The true scale of counterfeit spirit production is unknown however the World Health Organisation estimates that at least 25% of all spirits consumed are illicit. Many other authorities including the United Nations Conference on Trade and Development place this figure at over 40% in some areas.

Counterfeit spirits are commonly sold through online marketplaces, social media, and black-market websites, making them difficult to regulate and allowing sellers to hide their identity. In many cases the buyer of counterfeit spirits does so willingly, often due to affordability.

A major impact of illicit spirit production relates to public health. Some counterfeit spirits can contain harmful ingredients including, in extreme cases, aviation fuel or embalming fluid to increase the alcoholic concentration. Consequently, cases of liver damage, blindness, and death result.

Last year, there was a rise in fatalities in Iran linked to counterfeit alcohol and poisoning in the Alborz region in the north of the country with 14 deaths and at least 120 additional poisonings.

The economic impact of this illegal trade is significant, with up to 23,400 jobs said to be lost and eroding the trust of reputable manufacturers. It costs the EU, each year, around €3B in lost revenue.

As much as 33% of tested old and collected Scotch whisky is said to be counterfeit. A figure underlined in 2018 when the Scottish Universities Environmental Research Centre tested 55 bottles of Scotch Whisky that were old and considered rare. These were obtained from private collectors, auctions, and retail. The test concluded 21 bottles (38%) were faked, and every bottle from before 1900 found to be counterfeit.

Professor Annie Hill from Heriot-Watt University is the academic supervisor for the project. She said: “The Scotch Whisky Association drives the fight against counterfeit Scotch, and The Scotch Whisky Research Institute is a world leader in the detection of counterfeit spirits.

“This paper defines the problems and highlights potential solutions and our continuing research aims to further increase awareness, and to develop accessible and affordable methods to enable wider detection and identification of illicit distilled spirit products.”