Precision and repeatability: within-run and between-run variability of the method. Acceptance criterion is typically a relative standard deviation of ≤2% for area measurements.
Topic summary
Why one laboratory's 98.4% and another's 96.1% may not contradict
This is a generated summary. It shows the 5 most-liked posts from a topic of 38, in their original order, with the accepted answer included where one exists. It is a reading aid and it will miss nuance — the full topic is the record.
I read post #5 twice before replying, because I had assumed the opposite.
Robustness: the method gives consistent results when minor parameters vary. Tested by deliberately varying pH, temperature, flow rate, and mobile phase composition within reasonable ranges and demonstrating that results stay within acceptance.
31 likes 14mo
On post #12 — agreed on the reasoning, with one qualification.
Limits of detection and quantitation: LOD is the lowest concentration that produces a signal above background. LOQ is the lowest concentration at which the method meets precision and accuracy acceptance criteria. Both are determined empirically.
26 likes 12mo
Stability-indicating method: one that can separate a compound from its degradation products. Critical for assay methods that claim to measure actual degradation (as opposed to purity, which is orthogonal).
29 likes 9mo
Forced degradation studies: deliberately stress the material with acid, base, oxidant, heat, light to generate degradation products and demonstrate that the method can separate them from the parent peak. Acceptance is that the method is stability-indicating.
31 likes 7mo
Read the full topic (38 posts)
This topic was referenced in
- Specificity, linearity, accuracy, precision, range, robustness — with real criteriaAnalytics › Method validation · 48 replies
- Forced degradation studies: designing one that is informativeAnalytics › Method validation · 106 replies
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