Who else offers the range of biodegradation test types as reasonably priced as Chemex?

Chemex have the experience, equipment, understanding and desire to satisfy all your biodegradation needs.  Whether your biodegradation requirements call for Ready, Inherent, Anaerobic, Freshwater or Marine, Chemex can provide the solution.

Correctly pairing a sample with a test method can mean the difference between a pass and a fail in a biodegradation test.  Other testing laboratories only have the ability to conduct a limited range of test types, the disadvantages of this will rapidly become apparent.  Any test method that can be offered will have pros and cons.  If we take the OECD 301 Ready Biodegradation test guidelines as an example: The Closed Bottle Test (301D) is cost effective, reliable and as it generally has a low sample concentration is unlikely to be affected by sample toxicity, but because the method relies on direct oxygen readings any nitrification occurring will lead to complications with result interpretation.  The Carbon Dioxide Evolution Test (Modified Sturm 301B) does not suffer if nitrification occurs as the method of biodegradation determination is via trapping and analysing Carbon Dioxide evolved from the test solution, however as the method requires the test solution to be aerated a persistent foaming test sample may not remain in the test system.  The Manometric Respirometer Test (OECD 301F) is another option, this method is not affected by nitrification and is not aerated, however the concentration of test material is higher than the other methods mentioned, therefore if the test material is toxic to the bacteria in the inoculum a low or negative biodegradation result will be recorded.

Any biodegradation study will return a result; make sure the result you receive is a reflection of the best-case scenario.