Presence/Absence Broth ampules provide an easy-to-use test, ideal for screening drinking water samples for the presence of total coliform bacteria. Simply combine the P/A broth with your 100mL sample and incubate for 24 to 48 hours at 35 degrees Celcius. A color change to yellow or yellow brown indicates presence of coliform bacteria.
| Material | Glass |
| Quantity | 25 /pk |

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