Analysis Options

Despite this long list of Analysis Options, members do not need to complete every test. Some labs may choose to submit results for only two or three analytes and in fact, many labs do! This makes the Proficiency Program offered by the Interwinery Analysis Group both practical and accessible to both small and large winery laboratories.

Analysis Options


  • Free sulfur dioxide
  • Total sulfur dioxide
  • pH
  • Titratable acidity to pH 7.0
  • Titratable acidity to pH 8.2
  • Alcoholic strength
  • Residual sugars
  • Glucose/fructose
  • Volatile acidity
  • Acetic acid
  • Ascorbic acid
  • Manganese
  • Malic acid 
  • Citric acid
  • Potassium
  • Copper
  • Iron
  • Sodium
  • Calcium
  • Specific gravity
  • Carbon dioxide
  • Turbidity
  • Sugar Free Extract
  • Methanol