BrewingTechniques
Table I: Strengths of Selected American Porters
Compound Concentration (ppm)
Nitrates 18
Chloride 16
Sulfates 820
Carbonates 320
Calcium 352
Magnesium 24
Sodium 54
pH 7.0

Source: J.S. Hough, Malting and Brewing Science (Chapman and Hall, New York, 1982).
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