Definitions for "LIMIT OF DETECTION"
The lowest concentration of a substance that can be determined to be significantly different from zero.
the lower boundary of an assay (e.g., a viral load test). The limit of detection is the level below which a test cannot measure the presence of a component (e.g., HIV RNA).
"Detection limit is the lowest concentration of analyte in a sample that can be detected, but not necessarily quantitated, under the stated experimental conditions".