Colilert-18/Quanti-Tray is the ISO standard 9308-2:2012 for detecting total coliform and E. coli in water.
The enhanced formulation of Colilert-18 provides E. coli and Coliform testing results in just 18 hours – 6 hours sooner than Colilert. This shorter incubation period allows laboratories to improve workflow by reading afternoon samples the next morning
Simultaneously detects both total coliforms and Escherichia coli in water, or fecal coliforms in wastewater, giving you results in 18 hours.
- Read afternoon samples the next morning—before the next day’s samples arrive.
- Lift boil water alerts in 18 hours.
- Provide results in record time for real estate, new well, and new construction samples.
- Read Friday samples early Saturday, leaving the rest of the weekend free.
Product Number: 98-08877-00
Catalog Number: WP200I-18
Procedure for Qualitative testing (Presence/Absence)
Add reagent to sample and incubate at 35°C ± 0.5°C for 18 hours.
Colorless = negative
Yellow = total coliforms
Yellow/fluorescent = E. coli
Procedure for Quantitative testing (MPN/100mL)
Add reagent to sample.
Seal in Quanti-Tray Sealer and place in 35°C ± 0.5°C incubator for 18 hours (in other countries, the temperature requirement may be different per regulatory requirements).