Analysis of basic parameters of wine quality Rhine Riesling of Plešivica vineyards

Fizikalno-kemijska analiza ukazuje na sastav, a time i na samu kvalitetu vina koje se testira. Pojedine sorte uvelike se razlikuju u količini šećera, alkohola te drugih sastojaka koji svakoj sorti daju posebnost. U ovom radu analizirano je 6 različitih vina sorte Rajnski rizling s područja regije Središnja bregovita Hrvatska, podregije Plešivica, vinogorja Plešivica-Okić. Godina proizvodnje vina je 2018. Fizikalno-kemijskim metodama utvrđivane su količine slobodnog, vezanog i ukupnog sumporovog dioksida, količina šećera, ukupnih i hlapljivih kiselina te postotak alkohola. Osim fizikalno-kemijske analize, provedena je i tekućinska kromatografija visoke djelotvornosti (HPLC) kojom je određena količina glicerola, glukoze, jabučne i vinske kiseline te alkohola. Izmjerene količine svih spojeva bile su u skladu s propisima navedenim u Pravilniku o vinu i Pravilniku o proizvodnji vina u svim analiziranim vinima.Physico-chemical analysis indicates the composition, and thus the quality of the wine being tested. Some wine varieties differ greatly in the amount of sugar, alcohol and other ingredients that make each wine variety special. In this paper, 6 different wines of the Rhine Riesling varieties from the Central Hills of Croatia region, Plešivica subregion, Plešivica-Okić vineyards were analyzed. The year of wine production is 2018. The quantities of sulfur dioxide, the amount of sugar, total and volatile acids and the percentage of alcohol were determined by physico-chemical methods. In addition to physico-chemical analysis, high performance liquid chromatography (HPLC) was performed to determine the amount of glycerol, glucose, malic and tartaric acid and alcohol. The measured quantities of all compounds were in accordance with the regulations stated in the Wine act of Republic Croatia