Colorimetric Detection of Pb²⁺ Using Green Synthesized AgNPs

Abstract:

Lead (Pb²⁺) contamination poses a serious health risk. In this study, silver nanoparticles (AgNPs) were synthesized using bignay leaf extract (BLE) for the colorimetric detection of Pb²⁺ in water. UV-vis spectroscopy confirmed the formation of AgNPs with a surface plasmon resonance peak at 415-417 nm. EDX analysis revealed that the AgNPs had an elemental composition of 66.53% Ag, 13.47% O, and 11.54% C. DLS analysis showed an average hydrodynamic size of 140.2 nm. The reaction between AgNPs and Pb²⁺ resulted in the decolorization of the solution, which was attributed to the formation of Pb-GA complexes. The limit of detection (LOD) and limit of quantification (LOQ) were 50 ppb and 500 ppb, respectively.

• Periodical: Solid State Phenomena (Volume 370)
• Pages: 17-21
• DOI: https://doi.org/10.4028/p-d0maaD
• Online since: March 2025
• Authors: Blezzie Desales, Khent Ivan Duerme, Erwin Oliver V. Fundador, Noreen Grace V. Fundador*
• Keywords: Bignay, Pb²⁺, Silver Nanoparticles

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