How to Test for Diacetyl and VDKs in Beer and Wine with Gas Chromatography скачать в хорошем качестве

How to Test for Diacetyl and VDKs in Beer and Wine with Gas Chromatography

Worried about diacetyl in beer or VDKs in wine? In this video we show you step by step how to measure diacetyl and acetyl propionyl with headspace gas chromatography for precise flavour control. Diacetyl and other vicinal diketones (VDKs) can make or break the flavour of your drink. In beer, diacetyl gives an unwanted buttery flavour, while in wine, compounds like diacetyl and acetyl propionyl can add smoothness and body. Controlling them starts with accurate measurement. In this video, we show you step by step how to test for diacetyl and acetyl propionyl in beer and wine using headspace gas chromatography (HS-GC). From preparing calibration standards through to sample injection and analysis, we cover the complete workflow. What you’ll learn: How to prepare calibration standards for VDKs from 1000 ppm down to 0.01 ppm Why different concentration ranges matter for beer (ppb levels) vs wine (up to ppm levels) How to prepare samples: degassing, vial preparation, and oxygen purging Setting up the GC method for headspace analysis with electron capture detection Running standards to build calibration curves for diacetyl and acetyl propionyl Injecting samples, generating chromatograms, and quantifying VDK levels Using results to control off-flavours in beer or optimise smoothness in wine With a clear calibration curve and proper sample prep, GC can measure diacetyl and acetyl propionyl with precision at trace levels. Brewers can ensure a clean, crisp flavour by keeping diacetyl low, while winemakers can balance higher levels for smoothness and body. 📖 Related blog: https://blog.ellutia.com/blog 🌍 Learn more about GC systems and brewing applications: https://www.ellutia.com Gas chromatography in brewing and winemaking isn’t limited to VDKs. The same workflow can profile flavour compounds, monitor alcohol content, and track contaminants like nitrosamines. With compact GC systems, it’s practical to bring these analyses in-house for faster, more reliable quality control. If you found this video useful, give it a like and subscribe for more step-by-step guides. Have questions about VDK testing or brewing analysis? Let us know in the comments or get in touch: https://www.ellutia.com/contact-us #Diacetyl #VDK #BeerTesting #WineTesting #GasChromatography #BrewingScience #FlavourAnalysis #BrewingQuality #Ellutia #MadeInBritain