Photometer for Tartaric Acid in Wine


  • Part #:HA-HI83748
  • Weight:500 g (17.6 oz)
  • Availability: Inquire

Price: $831.93
Price: $1,139.74


Description

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:

  • Built-in timer - Display of time remaining before a measurement is taken. Ensures that all readings are taken at the appropriate reaction intervals for the test being performed.
  • Zero key - A simple press of the zero key on the face of the meter will account for the color and imperfections in the wine sample before reagent addition.
  • Auto shut-off - Automatic shut-off after 15 minutes of non-use when the meter is in measurement mode. Prevents wastage of batteries in the event the meter is accidentally left on.
  • Battery status indicator - Indicates the amount of battery life left.
  • Error messages - Messages on display alerting to problems including no light, inverted sample, and out of range.
  • Units of measure - Appropriate unit of measure is displayed along with reading

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.

Additional Information

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