Hach’s m-ColiBlue24 Broth simultaneously detects and identifies both total coliforms and Escherichia coli. Complete enumeration is accomplished in only 24 hours — no confirmation step is required, the company said.
Testing with Hach’s m-ColiBlue24 Broth requires no fluorescent lamps or color comparators — interpretation of the results is done by easy, visual identification. E. coli colonies are blue, other coliforms are red; total coliforms are the sum of the two. Results are enumerated directly, which is more accurate and precise than statistical-based tests, such as Multiple Tube Fermentation (MTF) and Most Probable Number (MPN).