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Thread: Does anyone have experience with VDK distillation?

  1. #1
    Join Date
    Jul 2017
    Virginia Beach

    Question Does anyone have experience with VDK distillation?

    Our lab is looking in to the possibility of switching from forced d-testing to VDK distillation to start quantifying diacetyl content. The ASBC Beer-25 broad-spectrum method seems like the best option that's within our price range ("Method B" in this paper: )

    Do you have any experience with this method? Any tips for what equipment to buy?

    The reagent prices are doable, but I'm hesitant on cheaping-out on a spectrophotometer. There are some durable models going for about $650, or insanely sophisticated UV-Vis units going for $7,000+.
    Here's the spec I was considering -
    Last edited by mmarcolina2; 07-11-2017 at 07:50 AM.

  2. #2
    Join Date
    Nov 2017
    South Korea

    210 nm?

    I don't have access to the ASBC methods anymore but I seem to recall the VDK distillation procedure including a measurement at about 210 nm. Maybe there's a different method now, but if that is the wavelength its measured at, you'll need a UV-Vis spectrophotometer. Visible spectrum measurement stop around 450 nm.

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