This standard specifies the cadmium selenide (CdSe) quantum dot nanocrystals UV-visible absorption spectroscopy characterization methods. This standard applies to the surfactant molecules-dispersion octyl phosphine oxide is three (TOPO, Trioctylphosphine) coated CdSe quantum dot nanocrystals formed in n-hexane. Dispersions other surfactant molecules coated CdSe quantum dot nanocrystals in a variety of non-polar reagent formed, synthesized in aqueous systems blessing selenide quantum dots and other semiconductor nanocrystal quantum dots composed of nano- crystal UV-visible absorption spectroscopy to characterize it may refer to this standard.