The phrase "final concentration" refers to the amount or strength of a substance at the end of a process or experiment. It tells us how much of the substance is present after all the steps or reactions have taken place. Full definition
For all adhesion assays two different concentrations of each matrix (Fibronectin; 74 ng / cm2 and 222 ng / cm2, Collagen I; 37.4 ng / cm2 and 112 ng / cm2, Collagen IV; 111.11 ng / cm2 and 333.33 ng / cm2 and Optimat which is mixture of these matrices with combined final concentration of 222.5 ng / cm2 and 667.6 ng / cm2) were coated by incubating at 37 °C for overnight. (journals.plos.org)
After transformation, a single colony from each was used to inoculate LB medium with Ampicillin (100 µg / ml final concentration). (peerj.com)
Final concentrations for ascorbic acid were calculated with external standards which were run simultaneously. (journals.plos.org)