Composition (% W/W)
| Component |
Hops |
Organic Solvent Extract |
Super - Critical CO2 |
Liquid CO 2 |
| Total resins |
12 - 20 |
15 - 60 |
75 - 90 |
70 - 95 |
| Alpha acids |
2 - 12 |
8 - 45 |
27 - 55 |
30 - 60 |
| Beta acids |
2 - 10 |
8 - 20 |
23 - 33 |
15 - 45 |
| Essential oils |
0.5 - 1.50 |
0 - 5 |
1 - 5 |
2 - 10 |
| Hard resins |
2 - 4 |
2 - 10 |
5 - 11 |
none |
| Tannins |
4 - 10 |
0.5 - 5 |
0.1 - 5 |
none |
| Waxes |
1 - 5 |
1 - 20 |
4 - 13 |
0 - 10 |
| Water |
8 - 12 |
1 - 15 |
1 - 7 |
1 - 5 |
|
Advantages |
| less bulky than either leaf hops or pellets |
| good storage stability |
| standardization gives control of bitterness |
| enhancement of utilization (33-38%) |
| reduced contamination with pesticides and nitrates |
| reduced wort losses |
| minimal packaging disposal problems |
|
Disadvantages |
| modified brewing behavior compared to leaf hops |
| Solvent extracts: |
| solvent residue |
| altered aroma profile |
| presence of “impurities” |
| Supercriticial CO2 extract: |
| altered aroma profile |
| higher cost than solvent extract |
| some “impurities” |
| Liquid CO2 Extract |
| slightly lower yield |
higher cost per unit alpha acids than other extracts |
|
|
Source:Moir, M.,(1988)
Developments in Hop Usage, Ferment
Vol 1, NO. 3, 49-56 |
