Laboratory precision

Laboratory precision (English intermediate precision ) is a technical term from the field of analytical chemistry . Laboratory precision is the precision that results from repeated determination of the same sample within a laboratory, but when a parameter of the analytical process is consciously changed (e.g. different operators, different measuring devices, different days, different batches of reagents).

Laboratory precision is an important criterion in the qualification of analytical methods and measuring devices. The framework conditions for determining the laboratory precision are not as tightly set as for the repeatability , but stricter than for the comparative precision . Often the laboratory precision that varies from day to day is given, with which the determination is repeated on different days.

See also

• Measurement system analysis
• Repeatability
• Comparative precision

Web links and sources

• Documentation of quality requirements for analytical chemistry at Eurachem
• International Organization for Standardization (ISO). Accuracy (Trueness and Precision) of Measurement Methods and Results . ISO / DIS 5725-1 to 5725-3. 1994.
• Stavros Kromidas: Validation in Analytics . Wiley-VCH, Weinheim, 2000, ISBN 3527287485 ; ISBN 978-3527287482