CDR WineLab® the reliable, complete and fast system of wine analyses

Determination of Total Sulfur Dioxide in vinegar

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 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. This test can be used to determine the total content of SO2 in vinegar.

Method

Test type: End Point.
Time testing: 1 minute.
Analysis sessions with multiple samples are possible up to a maximum of 16 tests for CDR WineLab® and 3 tests for CDR WineLab® Junior.

Sample treatment

Use vinegar as it is. If necessary, the sample should be centrifuged (code 222061) or filtered (code 300210).

Test Principle

The sulfur dioxide contained 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.

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Calibration curve

The calibration curve of CDR WineLab®, obtained using reference methods, confirms the excellent linearity of the system over the entire measuring range.

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Reagent test Kits

Code *300334: 100 test
Code *300350: 10 test
The reagents have a shelf-life of 15 months

Measuring Range

AnalysesMeasuring rangeResolutionRepeatability
Total SO2 red15 - 250 mg/L1 mg/L6 mg/L
Total SO2 white15 - 250 mg/L1 mg/L4 mg/L

The Analyzers for quality control in vinegar production

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CDR WineLab®

Top
  • Complete analysis panel, supplied already configured
  • Up to 16 determinations simultaneously
  • Possibility of carrying out analyses of the same sample
  • Integrated printer
  • Full connections (LAN - USB - Bluetooth barcode/QR code reader)
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CDR WineLab® Jr

Junior
  • Partial analysis panel, supplied configured with 3 analyses of your choice, implementable
  • Up to 3 determinations simultaneously
  • Wireless connection to external printer
  • USB connections
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