LOQ

plural LOQs · alternative LoQ

1. initialismchemistryLimit of quantification (or limit of quantitation); the lowest concentration of a substance that can be accurately measured under specified experimental. conditions.

   Therefore LOD and LOQ evaluation is only necessary for water.

   2003, Paul De Bièvre, Helmut Günzler, Measurement Uncertainty in Chemical Analysis, →ISBN, page 253

   3 more examples

   For this reason, many regulatory agencies define another limit, the limit of quantitation (LOQ), which is higher than the LOD and should have better precision.

   2004, James W. Robinson, Eileen M. Skelly Frame, George M. Frame II, Undergraduate Instrumental Analysis, →ISBN, page 59

   It is generally accepted that the LOQ is linked to method performance expectations including accuracy and precision.

   2005, Jack Cazes, Encyclopedia of Chromatography - Volume 2, →ISBN, page 1448

   The required precision for the LOQ is determined (usually = 10%), and for this value the concentration equal to the LOQ is read on the graph.

   2016, Piotr Konieczka, Jacek Namiesnik, Quality Assurance and Quality Control in the Analytical Chemical Laboratory, →ISBN

plural LoQs

1. alternativeinitialismchemistryAlternative form of LOQ.

   If the reproducibility (CV <15%25) and accuracy (>80%) meet a prespecified value, the LoQ is validated.

   2014, Steven L. Spitalnik, Suzanne Arinsburg, Jeffrey Jhang, Clinical Pathology Board Review, →ISBN, page 36

   2 more examples

   Values above the limit of quantification (LoQ) were only obtained in the 'fish' and 'alcoholic beverages' groups, but mean concentration levels in the latter group were very low (4/<gkg~1)4 in comparison to those obtained for the fish group.

   2001, L. Ebdon, Trace Element Speciation for Environment, Food and Health, →ISBN, page 244

   The empirical method is the same procedure as above for determination of LoQ but defined as the concentration at which all acceptance criteria are met and the quantitative value is within +-20% of the target concentration (i.e., CV criteria that was earlier discussed).

   2015, Alfred Bartolucci, Karan P. Singh, Sejong Bae, Introduction to Statistical Analysis of Laboratory Data, →ISBN, page 147