The effects of the concentration of the genipin stock solution (a), pH of the reaction (b) and heating time (c) on the color formation reaction between 2-aminobutanol (AB) and genipin.

 
 
  Part of: Thanayutsiri T, Patrojanasophon P, Opanasopit P, Ngawhirunpat T, Rojanarata T (2024) A novel, green and affordable semi-quantitative limit test for 2-aminobutanol impurity in ethambutol hydrochloride bulk and tablets. Pharmacia 71: 1-7. https://doi.org/10.3897/pharmacia.71.e124137