Potentiometric Chromate Anion Detection Based on Co(SALEN)₂Ionophore in a PVC-Membrane Sensor

Abstract

Fabrication of a polymeric membrane sensor based on N,N Bis(salicylidene) ethylenediamino cobalt(II) hydrate (Co(SALEN) 2) as an ionophore was focused upon for the purpose of optimizing a PVC matrix. The membrane contained Co(SALEN) 2 , PVC matrix, 2-Nitrophenyl octyl ether (oNPOE) as a plasticizer, and tetradodecylammonium chloride (TDDACl) as a lipophilic ionic additive with the composition of 5:30:62:3 (w/w), and underwent optimization. The Nernstian slope, detection limit, and response time were −28.33 ± 0.10 mV/decade, 7.9 × 10 −7 M, and <10 s respectively. The direct determination of 2 to 48.5 μg/ml of chromate standard solution showed an average recovery of 96.03% and a mean relative standard deviation of 1.6% at 100.0 μg/ml for Co(SALEN) 2 sensors. The ionophore functionality in the polymeric membrane and the strengths of anion-carrier interaction were studied by UV-Vis, Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM) analysis.

The overview and perspectives of biosensors and Mycobacterium tuberculosis: A systematic review

“…Reports have been published on the development of point‐of‐care testing strips using biosensors for the detection of microorganisms in clinical and biological samples (Fani, Rezayi, et al, 2019; Khorasani, Langari, Sany, Rezayi, & Sahebkar, 2019; Rezayi, Ghayour‐Mobarhan, et al, 2018; Rezayi, Ghasemi, Karazhian, Sookhakian, & Alias, 2014; Said et al, 2016; Said, Rezayi, Narimani, Manan, & Alias, 2015; Sany et al, 2016). Recently, biosensors have been developed for the diagnosis of bacterial infectious disease agents, such as TB (Table 2; Kanayeva, Bekniyazov, & Ashikbayeva, 2013).…”

Analysis of complexation between new bidentate bis-NHC ligand and some metal cations at different temperature

“…To determine the stability, selectivity and stoichiometry of NHCL-M n+ complexes with different metal cations, the conductometric technique was chosen [26]. This technique has several advantages such as great sensitivity [27], low cost [28] as well as simple experimental arrangement [29] compared with other techniques such as spectrophotometry, calorimetry [30], and NMR spectroscopy [31], and potentiometry [32][33][34][35]. The sensors based on electrochemical methods have been used to measure the analyte concentrations in water samples.…”

Potentiometric sensor for chromium(VI) using a composite of diphenylcarbazide-natural zeolite-modified membrane electrodes

“…In previous studies, various ionophores have been employed to be used for the fabrication of ISEs based on PVC membranes for the sensing of chromium(VI) species such as calix [4]arene [9], Cthiophenecalix [4]resorcinarene [10], quinaldine red [11], Cu(II)-bis(N-4-methylphenyl-salicyldenaminato) complex [12], europium β-diketone complex [13], bis(acetylacetonato) Cd(II) [14], N,N bis(salicylidene)ethylenediamino cobalt(II) hydrate [15], N, N, N, N -tetrakis(3 -aminopropyl) -1, 4 -butadiamine (DABAm4) [16], rhodamine-B [17], charged diaza crown ethers [18], 2-nitrophenyl phenyl ether [19], trioctylphosphine oxide [20], and tricaprylmethyl ammonium [21]. These ionophores have been studied by forming a complex with chromium(VI) within a membrane, so they could be used to fabricate ISEs.…”