Vintessential: Free Sulfur Dioxide Test Kits for Wine

Sulfur dioxide is used as a preservative in wine and there are restrictions limiting the amount that can be added in most wine producing countries. This test kit is a fast and easy way to determine the amount of free sulfur dioxide in wine samples, without the need for the laborious setup associated with traditional methods. Additionally, unlike some other commercial products this test kit does not contain formaldehyde, which is a known carcinogen.

The amount of sulfite present in wine is measured by monitoring the reaction with a chromogen under acidic conditions. The reduction of the chromogen leads to formation of a strongly absorbing compound which can be measured at 340 nm. The measured amount of the activated chromogen is stoichiometrically proportional to the amount of free sulphite present.

Free Sulfur Dioxide 30 Test kit

Product Code: 4A190

Please note these tests require the use of a spectrophotometer and semi-micro cuvettes.

Reagent No.ReagentPreparationQuantityStability
1BufferReady to use33 mLStable
2ChromogenReady to use17 mLStable
3StandardRefer to standard
preparation procedure
2 x 74 mgStable as supplied

Free Sulfur Dioxide Auto Test Kit

Product Code: 4B190

This kit has been designed to work with a Discrete Analyser. Get in touch for more information or a quotation.

Reagent No.ReagentQuantityStorage
FSO2 R1Buffer4 x 20.0 mLAt 4°C – Expiry on Label
FSO2 R2Chromogen2 x 11.7 mLAt 4°C – Expiry on Label
FSO2 BLBlank2 x 11.7 mLAt 4°C – Expiry on Label

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