run bias 

https://doi.org/10.1351/goldbook.08041
Contribution to measurement bias that is attributed to systematic effects on measurement results made in a single analytical run.
Note:
Measurement bias in analytical chemistry may be considered to include run bias, laboratory bias, and measurement procedure bias.
Source:
PAC, 2021, 93, 997. (Metrological and quality concepts in analytical chemistry (IUPAC Recommendations 2021)) on page 1015 [Terms] [Paper]