Economic and Environmental Geology

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Table. 1.

Table. 1.

“Fizz Ratings” and Associated Acid Quantities and Concentrations to be used in the ANC Determination (AMIRA International, 2002)

Reaction Fizz Rating HCl NaOH Molarity (M)
Molarity (M) Vol. (ml)
No Reaction 0 0.5 4 0.1
Slight Reaction 1 0.5 8 0.1
Moderate Reaction 2 0.5 20 0.5
Strong Reaction 3 0.5 40 0.5
Very strong reaction 4 1.0 40 0.5
5* 1.0 60 0.5

*5 is used for very high ANC material (> 400 kgH2SO4/t) e.g. limestone

Econ. Environ. Geol. 2021;54:561-72 https://doi.org/10.9719/EEG.2021.54.5.561
© 2021 Econ. Environ. Geol.