This paper presents a simple approach for measurement of inorganic carbon (IC) concentrations
and carbonate system alkalinity in anaerobic digester samples. The method described here,
based on CO2 volatilization from acidified samples, is a simplification of a previously described
method and is well-suited for application to manure digesters. Simplifying assumptions result in
a total systematic error smaller than 10% when applied to typical manure digester samples.
Application to standards of NaHCO3 showed accurate and precise results (for 5 g samples,
accurate to within 3%, coefficient of variation