Hanna Instruments

Scientific Equipment

Safety Data Sheets

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Certificates of Analysis

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Sulphur dioxide (SO₂) is added to alcoholic beverages, such as wine, to inhibit growth of bacteria and wild yeast, and as an antioxidant preventing browning. Some of the SO₂ is immediately bound in the wine when added, while the rest remains unbound (free SO₂), protecting the wine from unwanted microbes.


Sulphur dioxide content can be measured by titration, and Hanna supply a variety of automatic titrators for accurate determination of both free and total SO₂.