composite sample

https://doi.org/10.1351/goldbook.C01212
Often prepared as a representative mixture of several different (usually @[email protected]) @[email protected], and from which the @[email protected] is taken.
Source:
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 1465 [Terms] [Paper]