Figure 11. Ninhydrin reaction with reaction mixtures of hydrolyzed cicada shells in 12 M HCl at 25C

From

Cicada Shells as Chemical Education Resources to Study Functional Groups and Environmental Cycles

Naoki Maruyama, Toratane Munegumi

World Journal of Chemical Education. 2023, 11(4), 127-133 doi:10.12691/wjce-11-4-1