I would like to analyze comercial sources of willow bark extracts in order to ascertain if they are all-natural extracts or they are counterfeited with sinthetic salicin.
Imprint Analytics provides wide spectrum of food authenticity tests by IRMS, GC-C/P-IRMS, LC-IRMS and other techniques. Authenticity of natural compounds in extracts is provided by 2-dimensional (C and H) isotope method. For more information: