Electrochemical Sensing System Based on MnFe2O4/rGO for Simultaneous Determination of Trace Amount Pb2+ and Cd2+ in Spice Samples

Electrochemical sensors modified with iron oxide nanoparticles/nanocomposites for voltammetric detection of Pb (II) in water: A review

“…Therefore, the anti-interference ability of the modified electrode is one of the most crucial parameters impacting the accuracy of monitoring [ 169 ]. The tolerance limit is taken as the concentration of the interference ion that causes a relative standard error of <5 % in the observed peak currents or detection limits [ 24 , 75 , 134 , 136 , 184 ]. Alternatively, the ratio (I I /I O ) of the currents in presence (I I ) and in absence (I o ) of interfering ion (s) is obtained, with a value of 1 indicating high anti-interference abilities of the modified electrode [ 154 ].…”

Fluorescence sensor based on IFE between AEP@UCNPs and oxTMB for the determination of Cd 2+ in paddy rice combined with HRP enzyme inhibition mechanism

“…However, most of the sensitive and selective methods based on anodic stripping voltammetry (ASV) [5] , inductive coupled plasma atomic emission spectrometry (ICP-AES) [6] , atomic absorption spectrometry (AAS) [7] and inductively coupled plasma-mass spectrometry (ICP-MS) [8] have the problems such as professional operator, complex sample pretreatment process and expensive equipment. To address the above issue, many new sensors such as surface enhancement of Raman scattering (SERS)-based sensor [15][16] , electrochemical-based sensor [17][18] , colorimetric-based sensor [19][20] , fluorescence-based sensor [6,21] has been reported to determine Cd 2+ . Varied shortcoming still exists in the new sensors despite their individual advantages.…”