Determination of Total Sulfur Dioxide in wine

CDR WineLab analysis system fast, simple to use and reliable for determining multiple parameters in wine and mustWith WineLab is possible to determine the Total Sulfur Dioxide in wine in 1 minute with a simple photometric reading using the wine as is without having to resort to the distillation according with the reference method OIV or to the iodometric titration according with the simplified method. Calibration is not necessary.

The Analyzers CDR WineLab® for determining Total sulfur dioxide in Wine and Must

The system is supplied pre-calibrated and ready for use.
Results are expressed in accordance with the reference method.
It is also possible to standardize the system using samples with a known titration.
The reagents have a shelf-life untill 18 months
The analytical methods are simple: the system does not require an equipped laboratory or skilled staff.

  CDR WineLab wine analyzerCDR WINELAB® CDR WineLab wine analyzer Junior VersionCDR WINELAB® JUNIOR
Analyses Wine and Must:

Alcohol by Volume
Acetic acid (volatile acidity)
Fermentable Sugars
Total Acidity
L-Lactic Acid
L-Malic Acid
Free sulfur dioxide
Total sulfur dioxide
Yeast Assimilable Nitrogen (YAN)
Gluconic Acid
Acetaldehyde (Ethanal)
pH
Total Polyphenols Index
Glycerol
Colour (tonality and intensity)
Total Polyphenols (Folin Ciocalteu)
Total Anthocyanins
Polymerised Anthocyanins
HCl Index
Tannins

Catechins
Copper
Configuration with tailored panel of analyses
Simultaneous Sample Analyses 16 3
Multiple Analyses on a Sample si

Method

Test type: End Point.
Time testing: one test 1 minute – 80 Test/Hour.
Are possible test sessions with several samples, up to a maximum of 16.

Calibration curve

The calibration curve of CDR WineLab®, obtained using reference methods.

Total sulfur dioxide analysis in wine: correlation curve between CDR WieLab mathod and reference method results

Test Principle

SO32- + RSSR <—–> RSSO3– + RS-.
The sulfur dioxide contained in a wine is made to react with an organic disulphide in order to form a colored compound, whose intensity, measured at 420 nm in end-point, is directly proportional to the concentration of total sulfur dioxide in the sample.

Definition and scope of the test

Sulfur dioxide (SO2) is used in oenology mainly as preservative, but also for other purposes (for example for antiseptic, antioxidant, antioxidasic, solubilizing, combining and clarifying functions). Part of the SO2 that is added as potassium metabisulfite to musts and wines undergoes a series of reactions. Therefore, after a short period of time, most of the sulfur dioxide reacts with some of the substances present, binds with them and forms addition compounds (combined sulfur dioxide) that are unable to express the typical properties of unbound molecules. Therefore, only the part that does not combine (free sulfur dioxide) plays an important role in preserving wine from oxidizing alterations and from some micro-organisms. This test can be used to determine the total content of SO2 in wine, which is the sum of the free and combined sulfur dioxide fractions.

Reagent test Kits

The reagents are packaged in foil pouches containing 10 tubes useful to perform 10 analyses.

This is the minimum package that allows the use of CDR systems even to those who need to make a few analyses, thus not wasting reagents.

There are also boxes of 100 tests, however, packaged in 10 bags of 10 tubes containing the reagent.

Code. *300350: 10 tests 

Code. *300334: 100 tests (10 packages of 10 tests)

The reagents have a shelf-life of 18 months.

Processing – Sample Volume – Measuring Range

Wine: use as is.

Test Measuring range
(mg/L SO2)
Resolution Repeatability
Total SO2 White Wine 15 – 250 1 2,5 mg/L

For samples with SO2 > 200 mg/L, use 10 µL of sample and multiply the result by 2.5.

Reagents developed by CDR S.r.l - Quality System Certified ISO 9001 Ed. 2015 - Certificate n. 9115

Click and Discover more about CDR WineLab®: analysis system fast, simple to use and reliable for determining multiple parameters in wine and must

« back

Request a Free Quote Now!

With the CDR system, you can perform your tests in total autonomy

Neither skilled staff nor a dedicated external laboratory is needed to use our systems. CDR FoodLab® optimizes traditional testing methods, making them faster and easier, while guaranteeing accuracy standards in line with the reference methods.

Analytical kit

CDR FoodLab® Analysis Systems use disposable pre-vialed reagents specifically developed by the research laboratories of CDR. The use of pre-vialed reagents and the analytical procedures allow:

  • a sample preparation that is quick and easy, when needed at all;
  • making analytical procedures extremely fast and easy;
  • removing all needs for complex calibration procedures.

Reagents come in aluminum packages containing 10 test tubes each to perform 10 tests (or packages for 100 tests containing 10 single packages of 10 test tubes each).

Just a few steps and results are yielded right away

Just a few steps will suffice to carry out your analysis in a rapid way in total autonomy. The system is composed of both the analyzer based on photometric technology and a kit of low toxicity, pre-vialed reagents, developed by CDR.

CDR FoodLab® is cost-effective because it does not require the use of expensive equipment and does not entail maintenance, assistance or calibration costs.
Find out how it works