Isomerised Kettle Extract
A golden or pale brown thick syrup which becomes more fluid on warming; substantially more mobile than corresponding CO2 extract.
Overview
Isomerized Kettle Extract (IKE) contains isomerized alpha acids, beta acids and hop oils.
IKE is produced from CO2 extract and can be used as a complete replacement for normal or late-addition kettle extract.
IKE produces a similar flavor to CO2 extract whilst greatly improving the utilization of iso-alpha acids.
Flavour
Beers of identical aroma and taste can be produced when IKE is used as a direct replacement for normal CO2 extract. However care must be taken to ensure that late addition of IKE does not result in excessive hop character due to the increased retention of hop oil in final beer.
Quick Specs
Iso-Alpha Acids
Iso-alpha acid content varies according to the hop variety used but is typically in the range 40 – 60%
Alpha Acids
< 2%
Beta Acids
15 – 30% (depending on variety)
Hop Oil
3 – 12% (depending on variety)
pH
2.5 (± 0.5)
Viscosity
50 – 100 mPas (at 40°C / 104°F)
Density
0.9 – 1.0 g/ml at 20˚C (68˚F)
Description
Golden green to amber or pale brown extract; flows at room temperature (liquid)
