>98% [HPLC]
For the enumeration of enterococci in recreational water: J.W. Messer and A.P. Dufour, Appl. Environ. Microbiol., 64, 678 (1998). Used in a fluorescence technique for the detection of micro-organisms: A.P. Snyder et al., Appl. Environ. Microbiol., 51, 969 (1986).
Suitable for use in EPA-821-R-02-022 (Method1600), mEI Agar