The Use of Erythrosin B in Undergraduate Spectrophotometry Experiments

• L. James Stock III ^[1]
  1. [1] Central Michigan University

     Central Michigan University

     City of Mount Pleasant, Estados Unidos

     
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 72, Nº 10 (October), 1995, págs. 926-926
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • The CMU chemistry department has met regulatory and waste disposal concerns by using a non-toxic food color in a general chemistry experiment. Erythrosin B was found to be a suitable alternative to Sodium Dichromate when teaching solution preparation and the principles of spectrophotometry. Students weigh a small mass of Erythrosin B and prepare several solutions that are measured in a spectrophotometer. From these a Beer's Law plot is constructed. Finally, concentrations of unknown solutions are determined using the spectrophotometer and the Beer's Law plot.