What does rpt limit mean on a toxicology report?

In a toxicology report, "rpt limit" typically stands for "reporting limit." This is the minimum concentration of a substance that can be reliably detected and reported by the testing method used. If a substance is present below this threshold, it may be reported as "not detected" or "below the reporting limit," indicating that any quantification would not be reliable. Understanding the rpt limit helps in interpreting the significance of the results in relation to potential exposure or toxicity.