spectrophotometry
noun
spec·tro·pho·tom·e·try
ˌspek-(ˌ)trō-fə-ˈtä-mə-trē
: the quantitative measurement of properties (such as relative intensities) of light at different wavelengths of a particular spectrum
ultraviolet spectrophotometry
Using infrared spectrophotometry, Lynch was able to identify the substance as charred cotton, which could have come from anywhere.—David Fisher
… dual-wavelength spectrophotometry for the measurement of the optical properties of hemoglobin …—Honglian Jin et al.
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