PICRIC ACID; AN ALTERNATIVE SPECTROPHOTOMETRIC REAGENT FOR ESTIMATION OF EDTA SALTS. International Journal of Research in AYUSH and Pharmaceutical Sciences, India., v. 2, n. 6, p. 266–268, 2018. Disponível em: https://www.ijraps.in/index.php/ijraps/article/view/49. Acesso em: 21 oct. 2025.