Highly selective and sensitive optical sensor for determination of Pb2+and Hg2+ ions based on the covalent immobilization of dithizone on agarose membrane

Zargoosh, Kiomars; Babadi, Fatemeh Farhadian

doi:10.1016/j.saa.2014.08.043

Cited by 40 publications

(18 citation statements)

References 27 publications

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“…The diameter of the nanoparticles even can reach >100 nm. Note that dithizone can form a complex ion with Pb 2+ selectively at a pH above 5, while Hg 2+ forms a complex ion at pH 2.5 [19]. In this experiment, the system pH was around 6.…”

Section: Discussionmentioning

confidence: 79%

Colorimetric Sensing of Pb2+ Ion by Using Ag Nanoparticles in the Presence of Dithizone

et al. 2019

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Colorimetric analysis of heavy metal ions can be realized by the aid of Ag nanoparticles to improve the analytical characteristics. The method is based on the localized surface plasmon resonance (LSPR) properties of the Ag nanoparticles (AgNPs). In this work, we applied the AgNPs with the addition of dithizone to further improve the selectivity and sensitivity of Pb2+ analysis. Colorimetric sensing of Pb2+ ions based on the polyvinyl alcohol (PVA)-stabilized-colloidal AgNPs in the presence of dithizone is reported. A linear decrease in the AgNPs LSPR absorbance at 421 nm was observed along with the increase in the Pb2+ concentration in the range of 0.50–10 µg/L. The other ions give a minor change in the LSPR absorbance of colloidal AgNPs. The Pb2+ limit of detection, the limit of quantification, and sensitivity were found to be 0.64 ± 0.04 µg/L, 2.1 ± 0.15 µg/L, 0.0282 ± 0.0040 L/µg (n = 5), respectively. The obtained sensitivity is comparable with that of the immunosensing method. The proposed method could offer a good alternative for colorimetric analysis of Pb2+ ions by using nanoparticles in the presence of ligands, which can improve selectivity.

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Section: Discussionmentioning

confidence: 79%

Colorimetric Sensing of Pb2+ Ion by Using Ag Nanoparticles in the Presence of Dithizone

et al. 2019

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“…[29][30][31] It contains azo and hydrosulde groups, which are able to perform as good ligands on the membrane platform. 27,32 For example, Zargoosh and Babadi 33 developed an optical sensor by covalently immobilizing dithizone onto an agarose membrane for direct detection of Pb 2+ ions in industrial waste and environmental samples without any pre-concentration step. The absorbance differences obtained in their research show the feasibility of using dithizone as an optical indicator for fast metal ion detection.…”

Section: Introductionmentioning

confidence: 99%

Detection of mercury ions in water using a membrane-based colorimetric sensor

2018

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“…Various coating materials have been utilized in optical fiber-based heavy metal ions sensor, such as ditizone for the detection of mercury and lead [10], Pyrrole and chitosan for detection of cadmium, lead and mercury [11]. Compared to other materials, such as activated carbon, ditizone, and Pyrrole, Chitosan has advantages of having abundant sources and containing amino and high hydroxyl [12].…”

Section: Introductionmentioning

confidence: 99%

Chitosan Layer Fabry-Perot Interferometer-Based Optical Fiber Sensor for Cadmium Ion Detection

2016

3rd International Conference on Innovative Engineering Technologies (ICIET'2016) August 5-6, 2016 Bangkok (Thailand)

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Abstract-Optical sensors based on Fabry-Perot interferometer to detect cadmium ions is proposed. The sensor was fabricated by coating the tip of the optical fiber by chitosan. The two chitosan surfaces serve as mirrors which form a Fabry-Perot interferometer. The characterization results indicate that the sensor has a linear response with sensitivity of 0.0884 dBm/ppm with a correlation factor of 0.9665. The sensor reach steady state response in 5 minutes.

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Highly selective and sensitive optical sensor for determination of Pb2+and Hg2+ ions based on the covalent immobilization of dithizone on agarose membrane

Cited by 40 publications

References 27 publications

Colorimetric Sensing of Pb2+ Ion by Using Ag Nanoparticles in the Presence of Dithizone

Colorimetric Sensing of Pb2+ Ion by Using Ag Nanoparticles in the Presence of Dithizone

Detection of mercury ions in water using a membrane-based colorimetric sensor

Chitosan Layer Fabry-Perot Interferometer-Based Optical Fiber Sensor for Cadmium Ion Detection

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