Spectrophotometry, AtomicSpectrophotometryZincGraphiteMicrochemistryUltraviolet RaysLeadAluminumTrace ElementsAbsorptionCopperIntestinal AbsorptionChromiumMetals, HeavyMercuryMethodsSpectrophotometry, UltravioletCadmiumManganeseNickelMagnesiumPlatinumHairSeleniumErythrocytesIronCalciumReference ValuesTime FactorsUltraviolet TherapySpectrophotometry, InfraredSpectrum AnalysisRadiation EffectsChromatography, High Pressure LiquidKineticsPUVA TherapyErythemaTabletsSkin AbsorptionSunscreening AgentsOxidation-ReductionHydrogen-Ion ConcentrationBiological AvailabilityColorSpectrometry, FluorescenceMicroscopy, Ultraviolet