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Limit of Quantification (LOQ)

The smallest concentration that can be quantified with acceptable precision and accuracy, typically corresponding to a signal-to-noise ratio of 10:1 or an RSD below a specified threshold; only results at or above the LOQ should appear as specific concentrations in forensic chemistry reports.

Explained in

Reference Standards, Certified Reference Materials and the Quantification Baseline

Related terms

Certified reference material (CRM)Internal standard (IS)ISO 17034 Limit of detection (LOD)Linearity Measurement uncertainty (MU)Metrological traceability NIST SRM (Standard Reference Material)System suitability test

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