Free quotations · Genuine products · Delivery across Thailand and worldwide
Free quotations · Genuine products · Delivery across Thailand and worldwide
Product code: MX-12524
The HI84500 can be used to test for free and total sulfur dioxide in all wines, including red, which are difficult to test using traditional methods due to the inability to see the distinctive color change that occurs at the endpoint. The HI84500 offers reliable, accurate, and fast wine analysis.
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The HI84500 can be used to test for free and total sulfur dioxide in all wines, including red, which are difficult to test using traditional methods due to the inability to see the distinctive color change that occurs at the endpoint. The HI84500 offers reliable, accurate, and fast wine analysis. This mini titrator dispenses the titrant, detects the endpoint, and performs all necessary calculations automatically in a fraction of the time as compared to a manual titration. As found in Triage for Basic Wine/Grape Lab by Richard Carey, "the mini-titrator by Hanna reduces the time for an individual analysis by 75%.in. Winemakers add sulfur dioxide (SO2) to wine in order to inhibit bacteria and wild yeast growth and to serve as an antioxidant to prevent browning. When SO2 is added to wine, a portion of it becomes immediately bound while a remaining portion is unbound SO2. The portion that is unbound is also called free SO2 and it is responsible for protecting the wine. The bound and free SO2 together are referred to as total SO2. The relationship between the amount of SO2 added and the amount of free SO2 is complex, governed by the total amount of SO2 in the wine and the ability of compounds (e.g. sugars, aldehydes, keto acids, quinones, anthocyanin) to bind to the SO2. The exact relationship between free and bound SO2 will vary from wine to wine. The amount of free SO2 depends on how much is added, how much was present before the addition, and how much was immediately bound. Free SO2 exists in two forms. The first form, bisulfite (HSO3-), is the predominant form but is relatively ineffective. The second form, molecular SO2, is the minor form and is responsible for protecting the wine. The amount of molecular SO2 available in wine is dependent upon the amount of free SO2 present and the pH. Typically 0.8 ppm of molecular SO2 provides adequate protection against bacteria growth and oxidation. In order to obtain this value for a wine sample that has a pH of 3.2 you would need 22 ppm of free SO2. If the pH was at 3.5 you would need double the amount of free SO2, 44 ppm.
| Range | Low Range: 1.0 to 40.0 ppm of SO 2 High Range: 30 to 400 ppm of SO 2 |
|---|---|
| Resolution | Low Range: 0.1 ppm High Range: 1 ppm |
| Accuracy (@25ºC/77ºF) | Low Range: 3% of reading or ±0.5 ppm @ 25 °C, whichever is greater High Range: 3% of reading or ±1 ppm @ 25 °C, whichever is greater |
| Sample Volume | 50 mL |
| Methods | Ripper method |
| Principle | equivalence point redox titration |
| Pump Speed | 10 mL/min |
| Stirring Speed | 700 rpm |
| mV Range | -2000.0 to 2000.0 mV |
| mV Resolution | 0.1 mV |
| mV Accuracy (@25ºC/77ºF) | ±1.0 mV |
| Logging Data | up to 400 ( 200 titrations, 200 pH/mV readings) |
| Electrode | HI3148B glass body ORP electrode with BNC connector and 1 m (3.3') cable (included) |
| Environment | 0 to 50°C (32 to 122°F) RH max 95% non-condensing |
| Power Supply | 12 VDC adapter (included) |
| Dimensions | 235 x 200 x 150 mm (9.2 x 7.9 x 5.9in.) |
| Weight | 1.9 kg (67.0 oz.) |
| Warranty | 2 years |
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