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

Abstract

In this research work, three new derivatives of (E)‐Nʹ‐(methoxybenzylidene)‐4‐methylbenzenesulfonohydrazide (MBMBSH) were prepared by means of a condensation technique from the methoxybenzaldehyde and 4‐methyl‐benzenesulphonylhydrazine in good yields, which were crystallized in EtOH and MeOH. MBMBSH ligands were examined through spectroscopic progression (1H‐NMR, 13C‐NMR, FTIR, and UV‐Visible). Structures of the MBMBSH lignads confirmed with a single crystal X‐ray diffraction scheme (SCXRDS). MBMBSH derivatives used for the imminent recognition of heavy metal ion (thallium) based on a reliable current‐voltage (I−V) procedure. Smooth GCE was covered with a light layer of MBMBSH molecules and consequently modified toward a sensitive and selective thallium ion sensor using conducting polymer matrix, Nafion (NF). Analytical parameters such as sensitivity, LOQ, and LOD of GCE/4‐MBMBSH/NF as a sensor were calculated from the calibration plot and found as 622.9 pAμM−1cm−2, 250.0 mM, and 75.0 pM respectively. This prospective sensor (GCE/4‐MBMBSH/NF) applied to the careful determination of thallium ion in spiked environmental samples and found satisfactory result.

Development of a L‐cysteine Sensor Based on Thallium Oxide Coupled Multi‐walled Carbon Nanotube Nanocomposites with Electrochemical Approach

“…A detailed experimentation was accomplished to analyze biological samples for example HS (Human serum), MS (Mouse serum), and RS (Rabbit serum) by means of GCE/Tl 2 O.MWCNT NCs/CPM sensor for identification of L‐cysteine concentration based on a standard addition technique [31–43] . To identify L‐cysteine concentration in HS, MS, and RS, a set volume (∼25.0 μL) of each biological sample was evaluated in phosphate buffer (100.0 mM, 10.0 mL, and pH=7.5) and the corresponding calculation was conducted in the calibrated impending of at the potential of 0.4 V. The current‐voltage approach was effectively recognized by using I‐V signal for the analysis of molecules in biological sciences with this experiment (Figure 11 and Table 4).…”

An enzyme free simultaneous detection of γ-amino-butyric acid and testosterone based on copper oxide nanoparticles

“…The LOQ was found for GABA (39.0 pM) and TST (322.2 pM) from calibration curves based on eqn (x)-(xii). [19][20][21][22][23] Where, m ¼ slope of the calibration bend (1 Â 10 À5 and 9 Â 10 À5 ), A ¼ dynamic surface area of GCE (diameter ¼ 0.0316 cm 2 ), SD ¼ standard deviation (0.39 and 0.29) of GABA and TST concentration, calibrated at +0.6 V (Fig. 5b-d).…”

Simultaneous detection of l-aspartic acid and glycine using wet-chemically prepared Fe3O4@ZnO nanoparticles: real sample analysis

“…The sensitivity, LOD, and LOQ were calculated from the calibration plot using the eqn (xi)-(xiii) for L-aspartic acid (126.58 pM mM À1 cm 2 , z97.5 pM, and 325.0 mM) and glycine (316.46 pM mM À1 cm 2 , z13.5 pM, and 450.0 mM), respectively. [43][44][45] Here, m ¼ slope of the calibration curves (y ¼ 4 Â 10 À6 x + 0.494 and y ¼ 1 Â 10 À5 x + 1.125), A ¼ active surface area of the GCE (0.0316 cm 2 ), and SD ¼ standard deviation (0.13 and 0.45 at n ¼ 10) of L-aspartic acid and glycine towards the proposed sensor at the calibrated potentials (+0.4 and +0.7 V), respectively.…”