National Institute of Standards & Technology
نویسندگان
چکیده
This Standard Reference Material (SRM) is intended for the verification and calibration of spectrophotometers used to measure the concentration of Solvent Red dyes employed as colorants to mark “off-road” diesel fuel. SRM 2037 is certified for the purity of the Solvent Red 24 Dye (C24H20N4O, molecular mass 380.45) and for the secondderivative-based molecular absorption coefficients (extinction coefficients) of solutions of Solvent Red 24 Dye in p-xylene and in 97:3 (v:v) kerosene:p-xylene. Each unit of SRM 2037 consists of an amber 30 mL (1 oz), screw-capped bottle containing approximately 100 mg of solid Solvent Red 24 Dye.
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