Open AccessChemical Sensor for Detection of Lead Levels in Herbal Medicine
Author(s) -
Ani Mulyasuryani,
Yuniar Ponco Prananto,
Elvian Eka Krisnaniningrum
Publication year - 2021
Publication title -
molekul
Language(s) - English
Resource type - Journals
eISSN - 2503-0310
pISSN - 1907-9761
DOI - 10.20884/1.jm.2021.16.2.727
Subject(s) - electromotive force , chitosan , signal (programming language) , sensitivity (control systems) , electrode , lead (geology) , chemistry , materials science , analytical chemistry (journal) , chromatography , electrical engineering , electronic engineering , computer science , engineering , biochemistry , programming language , geomorphology , geology
A new tube type Pb2+ sensor made from two types of mixtures, namely clay-PbI2 and chitosan-PbI2 were prepared. An electromotive force (EMF) with Ag/AgCl as the reference electrode was used as the output signal. The highest performance of the Pb2+ sensor from clay-PbI2 was obtained at Pb2+ solutions in HNO3 and pH 3 with sensor sensitivity of 20.67 mV/decade. The highest performance of the Pb2+ sensor from chitosan-PbI2 was obtained at Pb2+ solutions in demineralized water with sensor sensitivity of 32.49 mV / decade. Application of the two sensors on several commercial herbal samples resulted in an average recovery of 85.62% and 94.10% for sensor from chitosan-PbI2 and clay-PbI2, respectively