Quantification level (QL) definition
Quantification level (QL) means the lowest standard in the calibration curve for a given analyte. The QL must have a value greater than zero and be verified each day of analysis by analyzing a sample of known concentration at the selected QL with a recovery range of 70% - 130% minimum levels, concentrations, or quantities of a target variable (e.g., target analyte) that can be reported with a specified degree of confidence in accordance with 1VAC30-45, Certification for Noncommercial Environmental Laboratories, or 1VAC30-46, Accreditation for Commercial Environmental Laboratories.
Quantification level (QL) means the lowest standard in the calibration curve for a given analyte. The QL must have a value greater than zero and be verified each day of analysis by analyzing a sample of known concentration at the selected QL with a recovery range of 70 – 130%.
Quantification level (QL) or "QL" means the minimum levels, concentrations, or quantities of a target variable (e.g., target analyte) that can be reported with a specified degree of confidence in accordance with 1VAC30-45, Certification for Noncommercial Environmental Laboratories, or 1VAC30-46, Accreditation for Commercial Environmental Laboratories.