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Determining low-alcohol concentrations in non-alcoholic beer - .PDF file.

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Alcohol in non-alcoholic beer is subject to strict inspection. A reliable method is needed to exactly determine the remaining small amounts of alcohol. The maximum admissible amount of alcohol in non-alcoholic beers is an important quality control parameter. In some countries the legal limit is 0.5 per cent of volume (vol.-%), in some other countries even less than that.

There are several proven methods used in quality control laboratories for the determination of low alcohol concentrations in beer. One of them is the density measurement of the distillate and conversion of the density result in vol.-% of alcohol according to the OIML alcohol table. This method is applicable for alcohol concentrations from 0.8 vol.-%. Gas chromatography is an approved analysis method for the selective determination of very low alcohol concentrations starting from 0.007 vol.-% in the headspace of non-alcoholic beer.

When comparing density measurements of the distillates and GC headspace analysis, the density-based alcohol result was always lower than the GC result. The alcohol measurement of the distillate with near infrared (NIR) spectroscopy with an Anton Paar Alcolyzer is as simple as density measurement. As the distillate is investigated, it is also suitable for alcohol concentrations below 0.5 vol.-%.

Anton Paar Ltd

Anton Paar develops, produces and distributes highly accurate laboratory instruments and process measuring systems, and provides custom-tailored automation and robotic solutions.

Anton Paar develops, produces and distributes highly accurate laboratory instruments and process measuring systems, and provides custom-tailored automation and robotic solutions.

It is the world leader in the measurement of density, concentration and CO2 and in the field of Rheometry. Other areas of specialty are: Viscometry, Polarimetry, Refractometry, Microwave Sample Preparation & Synthesis, Chemical and Mechanical Surface and Nanostructure Analysis.

With over 2200 employees at the headquarters in Graz (Austria) and the 25 sales subsidiaries worldwide, Anton Paar ensure that their products live up to their excellent reputation. The core competence of the company – high-precision production – and close contact to the scientific community form the basis for the quality of Anton Paar’s instruments.

A strong sales network in more than 110 countries guarantees customers rapid support and answers to their application and service queries.

Innovation is the basis for progress and every year Anton Paar invests more than 20 percent of the annual turnover in R&D.

Anton Paar Limited, a subsidiary of Anton Paar GmbH, provides sales, application support and service to users across the UK and Ireland.

With an office in St Albans (UK) and Dublin (Ireland) and a team of over 30 dedicated employees, Anton Paar Limited aims to provide first-class service at every stage in the customer relationship, ensuring our products live up to their excellent reputation.

Anton Paar Ltd
Unit F, The Courtyard
St Albans
AL4 0LA
UK

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