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Photometer for Reducing Sugars in Wine

  • Part #:HA-HI83746
  • Weight:512 g (18 oz)
  • Availability: Inquire
Price: $1,136.21
Price: $1,533.88

Description

This Photometer for Reducing Sugars in Wine combines accuracy and ease of use in an ergonomic, portable design. A user can accurately determine the concentration of reducing sugars in wine within a 0.00 to 50.0 g/L (ppt) range using the HA-HI83746-20 ready-made reagents.

This device uses the Fehling method to determine the concentration of reducing sugars less than 50.00 g/L (ppt). When Fehling’s A and Fehling’s B Solutions react with a sample containing reducing sugars, the sample will undergo a color change; 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 610 nm (orange) allows only orange 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 0.2 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
0.00 to 50.00 g/L (ppt)
Resolution
0.25 g/L
Precision
+/- 0.015 @ 0.350 g/L
Method
Fehling
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-HI83746 is supplied with glass cuvettes and caps (4), reagents for approx. 20 tests (HA-HI83746-20), HA-HI93703-59 charcoal, 200 μL automatic pipette with two plastic tips, 1000 μL automatic pipette with plastic tips (2), instruction sheet for automatic pipette, spoon, funnel, filter paper (25), cuvette wiping cloth, 12 VDC adapter, batteries, instruction manual, instrument quality certificate, and rigid carrying case.