Collilert-18

Collilert-18


  • The Colilert-18 method can be used to test for fecal coliforms in wastewaters when used with the Quanti-Tray system.
  • In this method, fecal coliform bacteria are defined as bacteria that produce a yellow color after 18-22 h incubation at 44.5° +/- 0.2° C. Positive results are visualized only by color change, not fluorescence.
  • Quality control should be conducted on each lot of Colilert-18, or more often as regulations require. Quality control procedures are identified in the product package insert (06-02027-19).
  • The U.S. EPA has determined that Colilert-18 is a suitable method for the detection of fecal coliforms in wastewater when incubated at 44.5° C.

*This method is intended for use in the detection and confirmation of fecal coliforms in Wastewater.
#The method is based on Defined Substrate Technology. The product utilizes a nutrient indicator (ONPG) that produces a yellow color when metabolized by fecal coliforms at 44.5ºC. When the reagent is added to the sample and incubated, it can detect these bacteria at 1 CFU/ml at 18 hours and up to 22 hours.

Download Colilert-18 Brochure