... — linearity — range — accuracy — precision — detection limit — quantitation limit Page 8/28 METTLER TOLEDO Validation of Titration Methods There are two practical ways to check a titration method for linearity: A) The regression coefficient (R 2) of the linear regression described in graph 1 must be better than a given limit, depending on the demanded accuracy for the specific determi-nation: i.e. Precision • Repeatability • Intermediate Precision • Reproducibility 8. Assay Validation Methods - Definitions and Terms ... may be allowed if there is scientific evidence that the transformation is appropriate for the method. For validation, multi-point calibration techniques are accepted, while single point calibrations are not. The protocol should include procedures and acceptance criteria for all characteristics. It provides to assess the range of concentrations for which the method can reliably function. Quantitation limit 4. 1. However, they can be summarised as working (or analytical) range and linear (or calibration, or dynamic) range. Keywords: Validation, analytical procedures, accuracy, precision, specificity, detection limit, quantitation limit, linearity, range. The validation characteristics 1. Range 6. ... (LOD) and limits of quantitation (LOQ), range… 2. Linearity is the method’s ability to obtain test results, which are directly proportional to the concentration of analyte in the sample. Published: 01/11/1994 (part I); 01/12/1996 (part II) For instance, linear range, analytical range, calibration range, dynamic range, working range. The term “linear” can in mathematics refer to the fact that the statistical models considered are linear in terms of all parameters (coefficients), also including polynomial relationships. Method Validation Linearity and range A stock solution of isoconazole nitrate (500 µg mL-1) was prepared in triplicate using the mobile phase as solvent, and each solution was serially diluted with the mobile phase for use as standard solutions with concentrations in the range of 25 - 75 µg mL-1. etc). Accuracy 7. It serves as a collection of terms, and their definitions, and is not intended to provide direction on how to accomplish validation. For each analyte, a set of linearity standards will be tested in the same manner as patient samples. R 2 > 0.995 Range is typically derived from linearity. Linearity studies will be performed as part of the procedure "Evaluation of Automated Test Methods" in order to determine linear reportable range. Each set of stock and standard solutions Reportable range of test results for the test system; Reference intervals (normal ranges) Specific to “reportable range,” a somewhat ambiguous term, CLSI provides clarification in document H26-A2, Validation, Verification, and Quality Assurance of Automated Hematology Analyzers; Approved Standard-Second Edition. and Methods Validation ... Parameters that may be evaluated during method development are specificity, linearity, 103 . Robustness 9. Method validation 5.1 Validation should be performed in accordance with the validation protocol. Range is the concentrations of analyte or assay values between the low and high limits of . The literature on method validation describes different ranges. ... while method linearity should be determined concurrently during the accuracy study. 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