Poolkasem, Angwara, and Neeranart changthong. “Method validation for determination of lead and cadmium in natural water using flame atomic absorption spectrometry (FAAS)”. Bulletin of Applied Sciences 1, no. 1 (October 7, 2022): 30–36. accessed March 6, 2026. https://ph03.tci-thaijo.org/index.php/BAS/article/view/173.