A fast routine analytical method was developed using HPLC with UV detection for determination of rebaudioside A in mixed beer and lemonade. The HILIC principle was used for separation of steviol glycosides.

The contribution of individual hop compounds to the total antioxidant activity was studied by HPLC method with CoulArray detection in broad scale of the potentials 250-900 mV.

The traditional method of High Performance LC (HPLC) was compared with the currently increasingly used Ultra- High Performance LC (UHPLC) on a representative group of 11 hop samples.

The Ultra High Performance Liquid Chromatography (UHPLC), which uses the principle of separation on sub-2 μm particles, was tested for the separation and determination of steric forms of iso-α-acids in beer.

The advantages of UHPLC over the traditional HPLC are a nine-fold reduction of analysis time, double improvement of resolution, and triple improvement of sensitivity.