The Spectral Transmissive Properties of Dyes: I. Seven Permitted Food Dyes, in the Visible, Ultra-violet, and Near Infra-red, Part 1
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absorption bands accuracy Acetate Mixture amperes apparatus B. S. Tech beam Beer's law BUREAU OF CHEMISTRY BUREAU OF CHEMlSTRY Bureau of Standards cell containing cent Chem chemical CHEMlSTRY SAMPLE colog Colorimetry Concentrations of pure CONCENTRATlON curves Determinations with dates distance of L2 electrometer Erythrosine exposures food dyes galvanometer Gibson Photoelectric Green S F Yellowish harmonic series Heterogeneous Source Maximum-definite Hilger infra-red investigation JULlUS Konig-Martens spectrophotometer L2 from S2 lamp Light Green S F Maximum and Minimum measurements mercury Methods Determinations Minimum Values—by Heterogeneous Naphthol Yellow obtained Orange photoelectric cells photoelectric currents photoelectric method photoelectric null method Phys plate Ponceau presented quartz radiant energy radiant power range ratio reliable rotating sector scale Schultz and Julius sector openings sector photometer solvent spark specific transmissive index spectrometer spectrum Table temperature thermopile thickness ultra-violet values of bck Values—by Heterogeneous Source visible water in jar Wollaston prism Yellow S Fig