Laser detector identifies counterfeit alcohol without opening bottles.
- The laser device detects counterfeits without opening bottles
- The technology is based on Raman spectroscopy
- Methanol in tested whiskey is 10 times below the norm
- The device is suitable for customs, manufacturers, and agribusiness
Researchers from the University of St Andrews (Scotland) in collaboration with colleagues from the University of Adelaide (Australia) have presented a new laser device capable of checking the contents of alcoholic beverages without the need to open the bottle. The method is based on Raman spectroscopy – a technique that captures the unique chemical 'fingerprint' of the liquid.
How it works
A focused laser beam is directed at the sample, with a wavelength selected to minimize the influence of glass. When the light interacts, it excites the molecules of the beverage, after which characteristic spectral lines are recorded. Based on their set, the system determines the composition of the liquid and the presence of harmful impurities, including methanol.
Scientists were able to filter out signals generated by the walls of the vessel due to precise tuning of the wavelength and beam shape. This completely eliminated the need to open the packaging, which is considered a significant technological breakthrough.
Test results
During the checks of whiskey samples, the device recorded methanol content that was ten times lower than the maximum allowable levels set by international safety standards. Such indicators demonstrate the high reliability of the method.
Compared to traditional laboratory analyses, the new system requires less time and is cheaper, making it attractive for widespread use.
Prospects for use
Developers see the potential of the technology not only in combating counterfeit alcohol but also in verifying the authenticity of perfumes, detecting pesticides in olive oil, and general quality control of agricultural products. The system is expected to be in demand by customs services, large manufacturers, distributors of alcoholic beverages, as well as agencies responsible for food and drug safety.
The implementation of such contactless diagnostics can significantly reduce the number of health-threatening counterfeits in the market, increasing consumer protection and simplifying the work of regulatory authorities.
Source: 3DNews
