lot

in analytical chemistry
https://doi.org/10.1351/goldbook.L03630
A quantity of material which is assumed to be a single population for sampling purposes.
Sources:
PAC, 1988, 60, 1461. (Nomenclature, symbols, units and their usage in spectrochemical analysis-X. Preparation of materials for analytical atomic spectroscopy and other related techniques (Recommendations 1988)) on page 1463 [Terms] [Paper]
PAC, 1990, 62, 1193. (Nomenclature for sampling in analytical chemistry (Recommendations 1990)) on page 1201 [Terms] [Paper]