Testing methods

Laboratory applies the official OIV methods, standards of the Russian Federation adopted in the Republic of Moldova (SM GOST R), interstate regional standards (GOST), national standards (SM), European standards adopted in the Republic of Moldova (SM SR EN, SM EN), specific procedures (PS) – standardized methods modified by the Laboratory, different special methods specified by the manufacturers of the used equipment for testing of wine products, alcoholic and non-alcoholic beverages, soft drinks, beers and beer based beverages, rectified ethyl alcohol, distillates of agricultural origin and the respective raw materials. Considering that wine products is the main product in relation to the other products tested within the Laboratory (approx. 85%) and its export potential, including in EU, the Laboratory is in the process of transitioning to OIV testing methods for mandatory indices for conformity assessment of wine and other wine products.

Besides classical volumetric methods, the following groups of instrumental testing methods are implemented in the Laboratory:

Chromatographic analysis methods:

  • gas chromatography (GC, GC/MS) for the determination of acetaldehyde, esters (ethyl acetate, methyl acetate), methyl alcohol, higher alcohols (butanol, isobutanol, isoamylol, propanol), phthalates, synthetic aromatizers, 3-methoxypropandiol;
  • high performance liquid chromatography (HPLC) for the determination of malvidin diglucoside, ochratoxin A, furfural and hydroxymethylfurfural;
  • capillary electrophoresis (EC) for the determination of organic acids (malic, lactic, tartaric, citric and acetic), preservatives (sorbic and benzoic acid), synthetic sweeteners (saccharin, acesulfam K), caffeine, ascorbic acid, cations (NH4+, K+, Na+, Mg2+, Ca2+), anions (SO42-, Cl, NO3, NO2, PO43-, F), synapic, syringic and coniferylic aldehydes, vanillin.

Atomic spectroscopy methods:

  • atomic absorption spectroscopy with electrothermal atomization (ETAAS) for the determination of lead, cadmium, arsenic in alcoholic and non-alcoholic beverages;
  • atomic absorption spectroscopy with flame atomization (FAAS) for the determination of copper, iron, zinc, sodium, potassium, calcium in alcoholic and non-alcoholic beverages;
  • atomic absorption spectroscopy with electrothermal atomization and Zeeman correction (Zeeman ETAAS) for the determination of mercury in solid and liquid samples of any composition.

NIR spectroscopy and electronic densimetry:

  • NIR spectroscopy for the determination of alcoholic concentration in wine, alcoholic and soft beverages, distillates and rectified ethyl alcohol;
  • electronic densimetry for the determination of density and relative density of alcoholic and non-alcoholic beverages.

Automated enzymatic methods:

  • automated spectrophotometry for the determination of “glucose and fructose” in wines, juices and non-alcoholic beverages.

The mentioned tests are carried out in 2 sectors: sector for physico-chemical and microbiological tests and sector for testing by instrumental methods. The sectors are subdivided into the following groups: gas chromatography and radiology, liquid chromatography and capillary electrophoresis, atomic spectroscopy, organoleptic analysis, physico-chemistry I and physico-chemistry II.

The implementation of modern methods of analysis, including European and international standards, is the basic element in the strategy of the Laboratory development.

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