1 / 22

A Look at Hop Utilization

A Look at Hop Utilization. AC Golden Brewing Company Jason Meherg, Jason zumBrunnen and Jeff Nickel. Overview. History: what is bitterness and how do you measure it Our test results Your results: discussion time. What is Bitterness. International Bittering Unit

portia
Télécharger la présentation

A Look at Hop Utilization

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. A Look at Hop Utilization AC Golden Brewing Company Jason Meherg, Jason zumBrunnen and Jeff Nickel

  2. Overview • History: what is bitterness and how do you measure it • Our test results • Your results: discussion time

  3. What is Bitterness • International Bittering Unit • The measure of Iso-Alpha Acids and other bitterness compounds in solution • 1 BU = 1 mg/L or 1 ppm • Alpha Acids vs Iso-Alpha Acids • Beta-Acids and Essential Oils

  4. Alpha Acids • Soft resin fraction • Humulone • Cohumulone • Adhumulone

  5. BB Beta Acids & Essential Oils • Beta Acids • Lupulone and the Ad-, Co-, and Pre- analogues • Essential Oils • Myrcene, Farnesene, Linalool, and Carophyllene • Over 300 others and growing

  6. Tinseth and Daneils

  7. How to Measure Bitterness • UV Spectrophotometric Method • HPLC

  8. UV Spec • Industry proven wet method • IBU = Abs275 x 50

  9. Automated UV Spec • Skalar is automated version • Reduces human variable

  10. IAA Spec Method • Very similar to standard BU method • Measures Isomerized acids • Includes two additional separations with methanol • Read at UV 255 nm • IAA = [(Abs255 x 96.15)+0.4]*3 • Report IAA in mg/L

  11. HPLC • Uses liquid mobile phase to separate components of a solution • Mixtures injected under high pressure into packed columns • Individual components resolved by adsorption or desorption • HPLC Mass Spec a further advance • Reduces “chatter”

  12. Which is Right? • Development of method • Benefits and negatives to both • Cost • Measure of perceived bitterness • Oxidized co-products contribute

  13. Our Turn

  14. Hops go Where? • Mash Hopping • Old technique • Enhances “kettle hop” character • First Wort Hopping • Also been around a long time • 1995 Brauwelt paper brought it back

  15. Special Thanks to:AC Golden: Fletch, Kent, Ben and ChrisDr. BobDr. David RyderRyan PiknaJaimie Lowe

More Related