Noun
spectrophotometry (uncountable)
(physics, analytical chemistry) the quantitative analysis of electromagnetic spectra by use of a spectrophotometer; especially in order to determine the structure or quantity of a substance
These data are measured through spectrophotometry reports at certified testing laboratories worldwide. Source: Internet
When hydrolysed by the enzyme these compounds liberate phenols, which were then reacted with dibromoquinonechlorimide to give a colour change, which itself was measured by checking absorption at 610 nm ( spectrophotometry ). Source: Internet