This method describes how to determine the epichlorohydrin content of drinking water using solid-phase extraction.
Drinking water intended for use as an ingredient in the production of beer (brewing liquor) or other foods
Epichlorohydrin is separated from a water sample by means of solid-phase extraction and is determined using gas chromatography with mass spectrometric detection (MS). Alternatively, an electron capture detector (ECD) can be employed.
Standardized extraction process with potassium hydrogen phthalate at pH 4.0 for use with filter media/filter aids.
Suitable for all common filter media/filter aids.
Elements (cations) from filter media/filter aids are extracted for determination using AAS, ICP-OES or ICP-MS at a pH 4.0.
Determination of the soluble extract in wet spent grain obtained by pressing
Wet spent grain
Wet spent grain is pressed using a manual press.
The sample is extracted with petroleum ether in a Soxhlet apparatus equipped with a reflux condenser; the solvent is evaporated and the crude fat residue weighed.
Hops and hop products intended for use in beer brewing or elsewhere in the food industry
The polyphenols are extracted from the hops using hot water. In an alkaline environment, they form a red pigment with iron (III) ions, which is measured spectrophotometrically at 600 nm.
This method describes the determination of the extract content of malt through the application of a complete extraction technique.
Malt intended for use in beer brewing or elsewhere in the food industry
Since the Congress mash method does not accurately quantify the extract content of malt, an attempt was made to eliminate the sources of error present in the method. The method described below incorporates the procedure for producing a Congress mash according to the EBC, followed by a complete extraction of the dissolved substances with a suitable apparatus. After the extraction is complete, the weight is determined. This method is preferred for determining brewhouse yield (e.g., during brewhouse equipment commissioning tests).