Sector for Testing by Instrumental Methods

Gas Chromatography and Radiology Group

Equipment and relevant tests

Gas chromatographs coupled with mass spectrometers are used to determine 3-methoxypropanediol (an indicator of the presence of technical glycerin in wines), phthalates, and synthetic flavorings. Chromatographs have high productivity and accuracy (substances can be determined at the concentration of 1 µg per liter or kilogram of product) and can be used to broaden the spectrum of tested products and determined substances.

Gas chromatographs with flame ionization detector are used to determine volatile substances in spirits, distillates and rectified ethyl alcohol, such as acetic aldehyde, esters (ethyl acetate, methyl acetate), methyl alcohol, higher alcohols (butanol, isobutanol, isoamylol, propanol). In 2018, 5654 relevant tests were performed.

The capillary electrophoresis system is used to determine preservatives (sorbic and benzoic acid), synthetic sweeteners (saccharin, acesulfame K), caffeine and ascorbic acid in alcoholic and non-alcoholic beverages. Technical characteristics of the capillary electrophoresis system allowed the mentioned tests to be carried out continuously with reduced reagent consumption. In 2018, 658 relevant tests were performed.

The gamma-beta scintillation spectrometer is used to determine the specific activity of the radionuclides as Cs-137 and Sr-90 of the alcoholic, non-alcoholic products and raw materials. In 2018, 3958 relevant tests were performed.

Auxiliary equipment

Hydrogen generator is used to obtain high purity hydrogen, which is necessary for the operation of gas chromatographs with the flame ionization detector.

The centrifuge is used to prepare samples for the determination of 3-methoxypropandiol, phthalates, preservatives and synthetic flavorings.

Liquid Chromatography and Capillary Electrophoresis Group

Equipment and relevant tests

High performance liquid chromatographs with UV/Vis and fluorescence detectors are used for the determination of malvidin diglucoside in red and rose wines, ochratoxin A in wines and beer, furfural in spirits and distillates and hydroxymethylfurfural in deionized concentrated grape must. The chromatographs have high productivity and accuracy and can be used to broaden the spectrum of tested products and determined substances. In 2018, 2359 relevant tests were performed.

Capillary electrophoresis systems are used to determine the organic acids (malic, lactic, tartaric, citric and acetic) in wine products, cations (NH4+, K+, Na+, Mg2+, Ca2+) and anions (SO42-, Cl, NO3, NO2, PO43-, F) in wine products, water, alcoholic and non-alcoholic beverages, as well as synapic, syringic and coniferylic aldehydes and vanillin in aged alcoholic beverages (divine, brandy etc) and aged wine distillates. Technical characteristics of the capillary electrophoresis systems allowed the mentioned tests to be carried out continuously with reduced reagent consumption. In 2018, 5952 relevant tests were performed.

Auxiliary equipment

The microcentrifuge is used to prepare the samples for HPLC and CE analyses.

Atomic Spectroscopy Group

Equipment and relevant tests

Atomic absorption spectrophotometers with electrothermal atomizer are used to determine lead, cadmium, arsenic in alcoholic and non-alcoholic beverages. In 2018, 5384 relevant tests were performed.

Atomic absorption spectrophotometer with flame atomization is used to determine copper, iron, zinc, sodium, potassium, calcium in alcoholic and non-alcoholic beverages. In 2018, 10033 relevant tests were performed.

The mercury content analyzer is used to determine the mercury in the alcoholic and non-alcoholic products and the respective raw materials. The analyzer can be used to test solid and liquid samples of any composition. In 2018, 566 relevant tests were performed.