Hop Aroma Products Flashcards
What are hop aroma products used for?
To add hop aroma to beer.
When is the late hop aroma added during the brewing process?
At the end of boil/whirlpool.
When is the dry hop aroma typically added during fermentation?
During fermentation/maturation.
Why is it not usually done to dose hops at the start of the boil?
Most of the aroma would be lost in the process.
What is the most common point for dosing hops?
After fermentation.
What methods are used to produce hop oil products commercially?
- Ethanol or CO2 extracts by steam and vacuum distillation
- Thin film evaporation under vacuum conditions
- CO2 fractionation
- Chromatography
- Steam distillation of uncompressed dried hop cones
What is the purpose of the distillation process in hop oil production?
To separate out the components of the hop or hop extract based on their volatilities.
How does vacuum distillation affect the boiling point of components?
It reduces the temperature of the boiling point for each component.
In CO2 fractionation, how do manufacturers change the polarity of CO2?
By adjusting the conditions during CO2 extraction.
What type of molecules dissolve more easily in a more polar solvent?
More polar molecules like the oxygenated fraction.
What is a common form of hop oil products for easier dosing?
Aqueous emulsion with propylene glycol.
What is one method of purchasing hop oil products?
As pure oil or encapsulated in maltodextrin as granules.
What is the recommended dosing time for hop oil products?
Over at least 80% of the time taken to transfer beer from vessel to vessel.
What is Barth Haas SPECTRUM made from?
CO2 extract.
What unique feature does Barth Haas SPECTRUM have regarding emulsification?
Uses a secret component of the hop extract as the emulsifier.
What is necessary to achieve the dry hop character in dry hopped beers?
Using a combination of pellets and/or whole hops along with oil products.
True or False: The search is ongoing for an extract that can replace dry hops.
True.
