Method detection limit The minimum concentration of a substance that can be distinguished from the absence of that substance within a stated confidence limit (generally 1%) given a particular analytical method. Definition adapted from Wikipedia. See http://en.wikipedia.org/wiki/Detection_limit. ODM2 Controlled Vocabulary Data Quality Type CV ODM2 Working Group A vocabulary for describing the type of data quality information provided for a particular Result. Examples include the accuracy or precision of the data values within the Result.