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Sulphur dioxide (SO₂) binding compounds in juice and wine

• Primary SO₂ ( sulphur dioxide ) binding compounds in juice are -
  
  
  • Sugars.
    
    
  • Grape skins and grape particles.
    
    
  • Compounds produced by botrytis cinerea in infected grapes.
    
    
• Primary SO₂ (sulphur dioxide) compounds in must and wine are -
  
  
  • Acetaldehyde
    
    
  • Red wine pigments (phenolics)