“O-PHTHALALDEHYDE AS A DERIV ATISING REAGENT FOR THE SPECTROPHOTOMETRIC DETERMINATION OF AMINES AND AMINO ACIDS”, Pakistan Journal of Scientific & Industrial Research, vol. 37, no. 10, pp. 408–410, Jun. 2022, Accessed: Mar. 21, 2026. [Online]. Available: https://www.biostaging.pjsir.org/index.php/biological-sciences/article/view/2731