Electrochemical Detection of Ni²⁺ Ions Using Synthesized (E)‐N’‐Chlorobenzylidene‐4‐methylbenzenesulfonohydrazide Derivatives Modified with a Nafion Matrix

Abstract

(E)‐N’‐Chlorobenzylidene‐4‐methylbenzenesulfonohydrazide (CBMBSH) compounds were synthesized using a simple condensation process from the derivatives of chlorobenzaldehyde and 4‐methylbenzenesulfonylhydrazine in a good yield which crystallized in ethanol. The CBMBSH molecules were totally characterized using conventional spectroscopic techniques such as 1H‐NMR, 13C‐NMR, FTIR, and UV‐Vis spectroscopy. The molecular structures of the CBMBSH molecules were confirmed using a single crystal X‐ray diffraction (SCXRD) method and used for the potential detection of heavy metal ion, nickel (Ni2+) using a reliable I−V technique. A thin layer of CBMBSH was deposited onto a flat glassy carbon electrode (GCE) with 5 % nafion coating binder in order to modify a sensitive and selective Ni2+ ionic sensor. Sensitivity, limit of detection (LOD), and limit of quantification (LOQ) of the modified electrode towards Ni2+ were calculated from the slope of calibration curve as 949.0 pAμM−1cm−2, 98.0±2.0 pM, and 326.67 mM respectively. The approaching CBMBSH/GCE sensor was applied to the selective determination of Ni2+ in spiked real samples, and found satisfactory and rational results.

A Thallium Ion Sensor Development Based on the Synthesized (E)‐N′‐(Methoxybenzylidene)‐4‐ Methylbenzenesulfonohydrazide Derivatives: Environmental Sample Analysis

“…Calibration curve (CAC) was plotted at + 0.4 V from Tl 3+ concentration (100.0 pM ∼ 100.0 mM) and found linear ( R 2 =0.9973 and SD=0.50 at n=10) (Figure b). Sensitivity, LOQ, and LOD were calculated from CAC and found as 922.9 pAμM −1 cm −2 , 250.0 mM, and 75.0 pM correspondingly . LDR (100.0 nM ∼ 1.0 mM) was calculated from the CAC and also observed linear, R 2 =0.9730 (Figure c).…”

The synthesis and application of (E)-N′-(benzo[d]dioxol-5-ylmethylene)-4-methyl-benzenesulfonohydrazide for the detection of carcinogenic lead

“…The sensitivity, LOQ, and LOD were calculated from the calibration curvature and found to be 2220.0 pA mM À1 cm À2 , 320.0 mM, and 96.0 pM, respectively. 24,25 The LDR (100.0 pM-10.0 mM) was calculated from the calibration curve and was also found to be linear, R 2 ¼ 0.8133 (Fig. 5c).…”

d-Glucose sensor based on ZnO·V2O5 NRs by an enzyme-free electrochemical approach

“…The sensitivity (1.27 Â 10 À3 mA mM À1 cm À2 ), LOQ (417.5 mM), and LOD (125 250 mM) of the proposed GCE/ZnO$V 2 O 5 NRs/Nf sensor were calculated using eqn (xi)-(xiii) from the calibration curve, where m ¼ slope of the calibration cure (4 Â 10 À5 x + 5.147), A ¼ active surface area of GCE (0.0316 cm 2 ), and SD ¼ standard deviation at the calibrated potential (1.67). 37,38 The LDR (1.0 mM-1000 mM) was derived from commencing the calibration curve and achieved to be also linear (R 2 ¼ 0.9492) (Fig. 6C).…”