This Photometer for Tartaric Acid in Wine combines accuracy and ease of use in an ergonomic, portable design. A user can accurately determine the concentration of tartaric acid in wine within a 0.0 to 5.0 g/L (ppt) range using the ready-made reagents.
Tartaric acid concentrations in wine range normally from 1.5 to 4.0 g/L. This acid concentration should not be confused with total or titratable acidity of wines, which are often expressed as tartaric acid content as well. Although it is the tartaric acid that is the predominant acid present (up to 60% of the total acidity), others like malic, citric, and several volatile acids contribute significantly to total acidity. The HI83748 uses a method with two reagents to determine the concentration of tartaric acid less than 5.0 g/L (ppt).
When both reagents are added to a sample containing tartaric acid, the sample will turn an orange-red hue; the greater the concentration, the deeper the color. The associated color change is then colorimetrically analyzed according to the Beer-Lambert Law. This principle states that light is absorbed by a complementary color, and the emitted radiation is dependent upon concentration. For determination of reducing sugars, a narrow band interference filter at 525 nm (green) allows only green light to be detected by the silicon photodetector and omits all other visible light emitted from the tungsten lamp. As the change in color of the reacted sample increases, absorbance of the specific wavelength of light also increases, while transmittance decreases.
Typical content of reducing sugars in must and wine:
| Must | sweet must normal in fermentation | 20 to 25 % 10 to 20 % 4 to 12.5 % | 200 to 250 g/L 100 to 200 g/L 40 to 125 g/L |
| Wine | sweet semi-sweet almost dry dry | 2.5 to 12.5 % 0.8 to 2.5 % 0.2 to 0.8 % 0 to 0.2 % | 25 to 125 g/L 8 to 25 g/L 2 to 8 g/L 0 to 2 g/L |
Features:
Specifications:
| Range | 0.0 to 5.0 g/L (ppt) |
| Resolution | 0.1 g/L |
| Precision | SD +/- 0.1 g/L @ 2.0 g/L |
| Method | The reaction between tartaric acid and the reagents causes a yellow/orange red tint in the sample |
| Power Supply | 1.5V AA batteries (4) / 12 VDC adapter; auto-off after 15 minutes of non-use |
| Environment | 0 to 50°C (32 to 122°F); RH max 95% non-condensing |
| Ordering Information | HA-HI83748 is supplied with sample cuvettes and caps (2), reagents for 5 manual tests (HA-HI83748A-0, HA-HI83748B-0), 200 μL automatic pipette with two plastic tips, 5 mL syringe with tip, cuvette wiping cloth, 12 VDC adapter, batteries, instruction manual, instrument quality certificate, and rigid carrying case. |
Tartaric Acid Analysis Reagents Kit (20 tests) – Part#:HA-HI83748-20
These reagents are used for the colorimetric determination of tartaric acid concentration in wine using the HA-HI83748 photometer. These high quality reagents are manufactured in our state-of-the-art facility and are clearly marked with the lot number and expiration date on each bottle for traceability
