Malt Quality Paramaters Flashcards
What are the main categories of malt quality parameters?
Malt quality parameters can be divided into groups based on different categories
Categories include analyses performed on malt and wort produced from malt.
What is the purpose of the laboratory mashes in malt analysis?
To produce wort from the malt for further analysis
Analyses include measuring specific gravity, extract, pH, colour, etc.
Describe the IoB mash process.
50 g of malt is ground to less than 0.7 mm, mixed with 360 mL hot water at 65°C, held for one hour, cooled to 20°C, topped up to 450 g, and then filtered
Specific gravity is measured to calculate extract as L°/kg.
What is the fine coarse difference?
The difference in extract between malt milled to 0.2 mm and malt milled to 0.7 mm
Indicates the impact of grind size on extract yield.
What is the EBC method?
A mash process that involves two temperatures: starting at 45°C for 30 minutes, then raising to 70°C for 60 minutes
Uses malt ground with a 0.2 mm gap.
What is the difference in extract measurement between as-is and dry weight basis?
As-is includes moisture content; dry weight basis (dwb) accounts for moisture to reflect extract if dry
DWB calculation uses the formula: Malt extract dry weight basis = (extract as-is / (100 - percentage moisture)) * 100.
How is wort density measured?
Using a pycnometer, densitometer, or hydrometer
This measurement is crucial for calculating extract availability.
What parameters can be determined from the worts produced by standard mashes?
Wort pH, colour, β-glucan, turbidity, FAN, and fermentability
These parameters are essential in evaluating malt quality.
Fill in the blank: The specific gravity of the wort is used to calculate how much extract is available from the malt, expressed as _______.
Litre degrees per kilogram (L°/kg)
This measurement is important for assessing malt efficiency.
What is the extract percentage for a malt with 5% moisture and 76% as-is extract?
80% extract on a dry weight basis
Calculation example: (76 / (100 - 5)) * 100 = 80.
True or False: The same mill is used for both IoB and EBC methods.
True
Both methods utilize a Buhler Miag disc mill.
