Toxicity Tests Toxicity Tests with E.coli Bacteria Toxi-ChromoTest™ Kit  
5032 Toxi-ChromoTest Kit A microplate toxicity bioassay to determine acute and chronic toxicity in water, effluents, and other liquids. The Toxi-ChromoTestTM procedure exposes the bacteria to the toxicants in the sample for a short (90-minute) incubation period. After the incubation period, a chromogenic substrate is added. If the sample is toxic, no colour will develop and if the sample is non-toxic, a distinctive blue colour quickly develops. The kit provides a clear, completely objective measurement of the toxicity of the sample by a simple visual qualitative evaluation of the colour obtained, or quantitatively by spectrophotometry using a micro-plate reader. Toxi-ChromoPad™ Kit 
5033 Toxi-ChromoPad Kit The assay allows the bacteria to grow in direct contact with the toxicants in the sample, eliminating expensive extraction procedures. The endpoint of the assay is an easy to interpret colour reaction. If the sample is toxic, no colour will develop; if the sample is non-toxic, a distinctive blue colour develops around the sample. Sedi-Tox™ Direct Sediment Toxicity Test
7032 Direct Contact Sediment Toxicity Test The SediTox™ kit is sensitive to a wide spectrum of toxic substances such as heavy metals, organic and inorganic pollutants, antibiotics and priority contaminants. The assay detects toxicity directly without labour intensive solvent extraction procedures. The sensitivity of the assay combined with its ease of use make it an essential research tool that can be used qualitatively for field measurements and quantitatively in the laboratory to compare relative toxicity between samples. The assay is based on the ability of a toxicant to inhibit the de novo synthesis of an inducible enzyme (β-galactosidase) in a highly permeable mutant of E. coli and the results manifest as an easily observable colour change after a short incubation period. |
