For the determination of FREE & TOTAL SULPHUR DIOXIDE in wine analysis
This instrument comes with a pre-programmed analysis method for free and total sulphur dioxide measurements on wine sample. Technically, sulphite is a salt or ester of sulfurous acid, but more commonly, sulfur dioxide (SO2). Sulfite is the most effective and widely used preservative in winemaking. It preserves by safeguarding musts and wines against premature oxidation and microscopic life forms that could otherwise spoil wine. It preserves a wine’s freshness, helps maintain its color, and is essential for aging wines beyond their first year without deterioration. It also inhibits wild yeasts, thereby allowing cultured wine yeasts to dominate the fermentation. Sulfites may be "bound" or "free." Bound SO2 combines with aldehyde compounds, those most responsible for oxidation in wines. Free SO2 results from the dissipation of active SO2 and is the only SO2 that provides antiseptic and oxidative protection to wines. The most efficient way to add free SO2 to a must, juice or wine is by adding dissolved potassium metabisulfite to it. The effectiveness of free SO2 is dependent on the pH of the media to which it is added.
Features & Specifications:
- Range: 0 to 400 ppm of SO2
- Resolution: 1 ppm
- Accuracy: +/- 5% of reading
- Method: Ripper Titrimetric Method
- Principle: Equivalence point redox titration
- Sample Volume: 50 ml
- ORP electrode included
- Operating Environment: 0 to 50C, Max. 95% RH
- Power Supply: 115V/60Hz; 10VA
- Stirring speed: 700 rpm
- Supplied complete with: Calibration standard SO2,Titrant SO2, Alkaline reagent for total SO2, Acid reagent for total SO2, Acid reagent for free SO2, Stabilizer, SO2, MA924B/1 ORP electrode, small stir bar, 2 x 50 mL beakers, 2 x 25 mL beakers, Refilling Electrolyte Solution 3.5M KCl for ORP electrodes 230 mL bottle, test tube set, O-ring, 1 mL syringe, power cable and instruction manual.
