[Determination of polyphenolic complex in wines by electrochemical methods and using the enzymes tyrosinase and laccase].
Several red wines were studied to find a correlation between physicochemical parameters characterizing the antioxidant status of wine and total content of phenols in samples. The content of dissolved oxygen (its value varied from 0.75 to 3.28 mg/ml), pH (3.10-3.63), redox potential (-186 to -106 mV), mass concentration of free and total sulfur dioxide (10-30 and 36-200 mg/dm3, respectively), absorption spectra, and total phenol content were determined. The wines fell into two main groups-with a relatively low (1850-2050 mg/dm3) and high (2300-2900 mg/dm3) contents of polyphenols. It was demonstrated that physicochemical parameters (except for the content of sulfur dioxide) correlate with the total phenol content in the wines studied.
Bach Institute of Biochemistry, Russian Academy of Sciences. Leninskii pr. 33, Moscow, 119071 Russia.
S V
SV
Shleev
S A
SA
Chekanova
O V
OV
Koroleva
E V
EV
Stepanova
Iu A
IuA
Telegin
Z E
ZE
Sen'kina
D000975:Antioxidants / Q000032:analysis; D015374:Biosensing Techniques; D004563:Electrochemistry; D005419:Flavonoids / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D042845:Laccase; D014442:Monophenol Monooxygenase; D010084:Oxidation-Reduction; D010100:Oxygen / Q000032:analysis; D010636:Phenols / Q000032:analysis*; D059808:Polyphenols; D013458:Sulfur Dioxide / Q000032:analysis; D014920:Wine / Q000032:analysis* / Q000592:standards
D000975:Antioxidants; D005419:Flavonoids; D010636:Phenols; D059808:Polyphenols; D013458:Sulfur Dioxide; D042845:Laccase; D014442:Monophenol Monooxygenase; D010100:Oxygen