Synthesis of silver nanoparticles using lemongrass leaf extract reductor (Cymbopogon citratus) and its application as a heavy metal sensor
Yussi Pratiwi1, Yogi Febrian2,

Chemistry Department, Mathematics and Natural Science Faculty, State University of Jakarta, Rawamangun, East Jakarta (13220), Indonesia
2Analytical Chemistry, State University of Jakarta, East Jakarta (13220), Indonesia

Abstract

A fast, effective and environmentally safe analysis method as a heavy metal sensor, namely silver nanoparticles synthesized with lemongrass leaf extract. The purpose of this study is to determine the optimal conditions for synthesis nanoparticles, characterize silver nanoparticles, and analyze the results of several method validation. The synthesis reaction under optimal conditions included a reaction time of 45 minutes, a concentration of AgNO3 used of 3 mM, and a concentration of 10% extract used to produce reddish-brown colloidal silver nanoparticles with a wavelength of 432 nm with a particle size distribution of 150.8 nm. GCMS in extract had the several ester compound. The results of the method validation have a linearity value of R2 = 0.9988 with the equation y = 0.04x + 0.0722. The selectivity results in mercury metal are effective at a concentration of 600 ppm. Based on the optimum conditions, linierity, selectivity, as well as sensitivity and LOD of silver nanoparticles synthesized with lemongrass leaf extract, it can potentially be an effective and simple mercury metal sensor.

Keywords: Colorimetric Sensors, Lemongrass, Method Validation, Silver Nanoparticles

Topic: Chemistry