TABTHASONG, T.; KUENGKLANG, S. THE MEASUREMENT OF METAL IONS USING LAGERSTROEMIA SPECIOSA (L.) PERS. FLOWER EXTRACTS WITH DIGITAL IMAGE COLORIMETRY TECHNIQUES ON SMARTPHONES . PSRU Journal of Science and Technology, Phitsanulok, Thailand, v. 10, n. 3, p. 35–54, 2025. Disponível em: https://ph01.tci-thaijo.org/index.php/Scipsru/article/view/259968. Acesso em: 17 sep. 2026.