Analysis for determining the taurine content after derivatization using HPLC
This analysis is suitable for energy drinks and NAB.
Taurine is derivatized using dansyl chloride, separated using HPLC in reversed phases and determined with a fluorescence detector.
Determination of caffeine and theobromine using HPLC
This method is suitable for beverages containing caffeine, tea-based beverages and NAB.
Caffeine and theobromine are separated using HPLC and reversed phases and determined by means of UV detection.
Determination of glucuronolactone by means of ion chromatography and pulsed amperometric detector
This method is suitable for energy drinks and non-alcoholic beverages.
Glucuronolactone is separated by means of a strongly alkaline eluent with an ion exchange column. It is detected and quantified electrochemically using a pulsed amperometric detector (PAD).
Through creating a potential, the ions are oxidized on a gold electrode and induce a measurable charge. To prevent the electrode from being coated over a short time, the potential is then reversed to reduce and release the ions from the electrode.
This method describes the method for determining the germinative energy of barley by inducing germination in a germination box under defined conditions.
Barley intended for the production of malt is evaluated on the basis of germinative energy.
This method requires that the germination of barley be induced at a defined temperature and humidity. The germination period is three or five days.
This method describes the method for determining the germinative energy of barley under conditions similar to those during malting.
Barley intended for the production of malt is evaluated on the basis of germinative energy.
This method requires that the process of steeping with periodical intervals of air rests be simulated. The duration of steeping and germination lasts three days (or five days).
Barley intended for the production of malt is evaluated on the basis of germinative energy.
Using this method, a steeping process, divided into steeping and air rests, is simulated. A practice-oriented process (with two and four days of germination) is implemented, which has proven useful for shorter, modern germination processes.