Optical Sensor for the Determination of Lead(II) Based On Immobilization of Dithizone onto Chitosan-Silica Membrane

Nur, Yuspian; Rohaeti, Eti; Darusman, Latifah Kosim

doi:10.22146/ijc.23560

Cited by 22 publications

(19 citation statements)

References 13 publications

(19 reference statements)

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“…The surfaces of sheets were scrubbed by dry cleaning, water cleaning and EDTA-2Na aqueous solution (0.1M, H2O) cleaning once and twice respectively. Lab surface testing for lead can be carried out using dithizone (C13H12N4S) colouration (4mM, Ethanol), and this is practiced by national standard with a detection limit of 1ppm [22,23]. The higher concentration of lead ion, the deeper red color appears on the surface.…”

Section: Resultsmentioning

confidence: 99%

Chelating Agent: The Health Protector of Researchers in Lead Halide Perovskite Laboratory

Deng

2020

Preprint

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<p>Lead halide perovskites have achieved substantial success in various optoelectronic devices owing to their remarkable physical properties. However, lead (Pb) as a heavy metal, long-lasting toxic to the body has become a health hazard for researchers. How to completely remove the residual lead in the laboratory and prevent lead from entering the human body have always been an important topic in laboratory safety. Here we develop an operable method to treat lead sources with low-cost and eco-friendly chelating agent (EDTA-2Na), which can reduce the concentration of free lead ions to 10<sup>-11 </sup>ppm theoretically. Moreover, experiments have demonstrated that the chelating agent possess a strong ability on the removal of lead ions from the lab surface, gloves and lab coats. This approach paves the way to protect the health of researchers in lead halide perovskite laboratory. </p>

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Section: Resultsmentioning

confidence: 99%

Chelating Agent: The Health Protector of Researchers in Lead Halide Perovskite Laboratory

Deng

2020

Preprint

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“…Herein, the preparation of the four types of chitosan-based sol gel membranes is presented. The procedure followed for the synthesis of membranes was primarily adapted from the one described in the literature [ 13 ] with necessary modifications in accordance with the type of membranes prepared. The initial step in the preparation of the tetreaethylorthosilicate (TEOS) solution is the same for all the membranes and is a major step for the formation and incorporation of polysiloxane (PSil) chains by the sol–gel process.…”

Section: Methodsmentioning

confidence: 99%

“…One of the applications of these biopolymers, most specially chitosan [ 11 , 12 , 13 , 14 ], has been the preparation of optosensing membranes for metal cations. The polymers that make up the membrane not only act as the solid supports, on which the recognition elements are immobilized, but can also provide permeation selectivity for certain species while rejecting others.…”

Section: Introductionmentioning

confidence: 99%

“…In another article, the production of a membrane based on chitosan and polysiloxane is described, to which dithizone was immobilized in order to detect the presence of Pb(II) in aqueous solutions. This optical sensing membrane showed a detection limit of 110 µg L −1 [ 13 ]. Other membranes containing chitosan were prepared, such as a chitosan/cellulose membrane, functionalized with rhodamine in order to change color in the presence of a metal cation [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

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Improved Metal Cation Optosensing Membranes through the Incorporation of Sulphated Polysaccharides

et al. 2022

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Optosensing chitosan-based membranes have been applied for the detection of heavy metals, especially in drinking water. The novelty of this study is based on the use of sulphated polysaccharides, in such optosensing membranes, aiming at an improved analytical performance. The sulphated polysaccharides, such as ulvan, fucoidan and chondroitin sulfate, were extracted from by-products and wastes of marine-related activities. The membranes were developed for the analysis of aluminum. The variation in the visible absorbance of the sensor membranes after the contact between the chromophore and the aluminum cation was studied. The membranes containing sulphated polysaccharides showed improved signals when compared to the chitosan-only membrane. As for the detection limits for the membranes containing ulvan, fucoidan and chondroitin sulfate, 0.17 mg L−1, 0.21 mg L−1 and 0.36 mg L−1 were obtained, respectively. The values were much lower than that obtained for the chitosan-only membrane, 0.52 mg L−1, which shows the improvement obtained from the sulphated polysaccharides. The results were obtained with the presence of CTAB in analysis solution, which forms a ternary complex with the aluminum cation and the chromophore. This resulted in an hyperchromic and batochromic shift in the absorption band. When in the presence of this surfactant, the membranes showed lower detection limits and higher selectivity.

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“…The results for the Pb(II) content of the real samples determined by the proposed sensor (Table 3) nicely replicate those obtained via atomic absorption spectrometry (AAS). The overall performance of the proposed optical sensor was compared with that of recently reported Pb(II) optodes [16,[48][49][50][51][52][53] (Table 4). The comparison highlights an overall In particular, the concentration of Pb(II) was fixed at 1.0 ×10 −6 M in solutions buffered at pH = 5, and changes in the fluorescence emission were evaluated by measuring the emission signal before and after the addition of the interfering ion at a 1.0 × 10 −4 M final level to the Pb(II) solutions.…”

Section: Analytical Applicationmentioning

confidence: 99%

A Selective Fluorescent Optode for Lead(II) Based on the Dansylamidopropyl Pendant Arm Derivative of 1,4-Dioxa-7,13-dithia-10-azacyclopentadecane ([15]aneNS2O2)

Shamsipur,

Mohammadi,

Arca

et al. 2023

Chemosensors

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In this study, a novel highly sensitive and selective fluorescent optode membrane aimed at the determination of Pb(II) ion is proposed by incorporating N-(3-(1,4-dioxa-7,13-dithia-10-azacyclopentadecan-10-yl)propyl)-5-(dimethylamino)naphthalene-1-sulfonamide (L) as fluoroionophore in polyvinyl chloride (PVC) containing 2-nitrophenyl octylether (NPOE) as a plasticizer. In addition to high stability and reproducibility, the proposed optosensor showed a unique selectivity toward Pb(II) ion, with a wide linear range of molar concentrations (1.0 × 10−9–1.0 × 10−3 M) and a low detection limit of 7.5 × 10−10 M in solution at pH 5.0. The formation constants of the Pb(II) complexes with the fluoroionophore were evaluated by fitting the fluorescence data with a nonlinear least-squares curve-fitting program, and further information about the structures of the complexes were evaluated based on hybrid-DFT calculations. The optosensor exhibited a fast response time of less than three min, being easily regenerated by exposure to a solution of dithiothreitol. The sensor was applied to the determination of Pb(II) in real samples (canned tuna fish), and it provided satisfactory results comparable to those obtained via atomic absorption spectrometry (AAS).

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Optical Sensor for the Determination of Lead(II) Based On Immobilization of Dithizone onto Chitosan-Silica Membrane

Abstract: Optical sensor based on immobilization of dithizone onto chitosan-silica for the determination of

Cited by 22 publications

References 13 publications

Chelating Agent: The Health Protector of Researchers in Lead Halide Perovskite Laboratory

Chelating Agent: The Health Protector of Researchers in Lead Halide Perovskite Laboratory

Improved Metal Cation Optosensing Membranes through the Incorporation of Sulphated Polysaccharides

A Selective Fluorescent Optode for Lead(II) Based on the Dansylamidopropyl Pendant Arm Derivative of 1,4-Dioxa-7,13-dithia-10-azacyclopentadecane ([15]aneNS2O2)

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