in spectrochemical analysis
An error which arises when the absorbance
of some samples changes with time, e.g. as a result of photochemical reaction
, formation of aggregates or adsorption on the cell wall.
PAC, 1988, 60, 1449
(Nomenclature, symbols, units and their usage in spectrochemical analysis - VII. Molecular
absorption spectroscopy, ultraviolet and visible (UV/VIS) (Recommendations 1988))
on page 1457