“Batch and flow injection spectrophotometric determination of procaine-HCl using diazotization-coupling reaction”, J. basic appl. Res. Biomed., vol. 2, no. 4, pp. 577–583, Mar. 2022, Accessed: Feb. 23, 2026. [Online]. Available: https://jbarbiomed.com.169-60-48-10.cpanel.site/home/article/view/135