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Direct linkJames A. Ciaccio; Baran Ak; Kareem Hassan – Journal of Chemical Education, 2023
The pharmacologically active lignans sesamin and sesamolin are minor components of sesame oil and ingredients in OTC dietary supplement capsules. We report an introductory undergraduate organic laboratory experiment combining natural product isolation and spectral analysis in which students isolate a mixture of sesamin and sesamolin by either (1)…
Descriptors: Undergraduate Students, Chemistry, Science Instruction, Organic Chemistry
Peer reviewedPenteado, Jose C.; Angnes, Lucio; Masini, Jorge C.; Oliveira, Paulo C. C. – Journal of Chemical Education, 2005
This article describes the reaction between nitrite and safranine O. This sensitive reaction is based on the disappearance of color of the reddish-orange azo dye, allowing the determination of nitrite at the mg mL-1 level. A factorial optimization of parameters was carried out and the method was applied for the quantification of nitrite in…
Descriptors: Science Activities, Science Education, Laboratory Experiments, Spectroscopy
