Preconcentration and Determination of Trace Amounts of Heavy Metals in Water Samples Using Membrane Disk and Flame Atomic Absorption Spectrometry

Moghimi, Ali

doi:10.1002/cjoc.200790119

Cited by 26 publications

(5 citation statements)

References 32 publications

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“…A comparison of the proposed technique with other methods demonstrates that the proposed technique is more accurate, easy, and rapid as it had less relative standard deviation values compared with other methods [33,[45][46][47]. The mentioned method is one of the best systems for the analysis of very trace amounts of Hg 2+ ions in water samples.…”

Section: A Comparison Between the Presented Technique And Other Methodsmentioning

confidence: 99%

An alternative method of dispersive solid‐phase extracting Hg (II) from environmental aqueous solutions using carboxylic functionalized carbon nanotubes

karimnezhad

Moghimi

Adnan

et al. 2022

Micro & Nano Letters

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This study is a simple method for rapid sample preparation before instrumental experiment, which is an important tool and the main step in an analytical proceeding. Till now, different sample preparation procedures based on solid-phase extraction manner were developed to isolate different types of analytes from different matrices. In this method, the preconcentration and removal of trace amounts of Hg (II) ion in aqueous samples with nanotubes functionalized carboxyl are displayed. The analysis of Hg 2+ ions concentration in water solutions was accomplished by flame atomic absorption spectroscopy. Some parameters including the pH, value, and type of desorption eluent solvent, extraction time, ions effect etc. were optimized. The Freundlich, Langmuir, Temkin, and Dubinin-Radushkevich models were employed to estimate Hg (II) ions adsorption. The Freundlich model was obtained from the study of isotherm studies. The kinetic studies demonstrate the adsorption of Hg (II) ions by adsorbent fitted with the pseudo-second-order type and resulting from that chemisorption is the rate-limiting process in the Hg (II) adsorption. The concentration parameter such as level of detection of proposed method, and relative standard deviation test were obtained as 20.83, 6 µg L −1 , and 1.16%, respectively.

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Section: A Comparison Between the Presented Technique And Other Methodsmentioning

confidence: 99%

An alternative method of dispersive solid‐phase extracting Hg (II) from environmental aqueous solutions using carboxylic functionalized carbon nanotubes

karimnezhad

Moghimi

Adnan

et al. 2022

Micro & Nano Letters

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“…Currently, the typical techniques employed for detecting Pb 2+ mainly include fluorescence [ 9 , 10 ], electrochemical [ 11 , 12 ], colorimetric [ 13 ], and atomic absorption methods [ 14 , 15 ]. While these detection methods can effectively analyze the substances qualitatively and quantitatively, they suffer from limitations including low sensitivity, insufficient detection limitation, high detection cost, and complex operational procedures.…”

Section: Introductionmentioning

confidence: 99%

Advanced Integration of Glutathione-Functionalized Optical Fiber SPR Sensor for Ultra-Sensitive Detection of Lead Ions

Wang,

Niu,

Hou

et al. 2023

Materials

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It is crucial to detect Pb2+ accurately and rapidly. This work proposes an ultra-sensitive optical fiber surface plasmon resonance (SPR) sensor functionalized with glutathione (GSH) for label-free detection of the ultra-low Pb2+ concentration, in which the refractive index (RI) sensitivity of the multimode-singlemode-multimode (MSM) hetero-core fiber is largely enhanced by the gold nanoparticles (AuNPs)/Au film coupling SPR effect. The GSH is modified on the fiber as the sensing probe to capture and identify Pb2+ specifically. Its working principle is that the Pb2+ chemically reacts with deprotonated carboxyl groups in GSH through ligand bonding, resulting in the formation of stable and specific chelates, inducing the variation of the local RI on the sensor surface, which in turn leads to the SPR wavelength shift in the transmission spectrum. Attributing to the AuNPs, both the Au substrates can be fully functionalized with the GSH molecules as the probes, which largely increases the number of active sites for Pb2+ trapping. Combined with the SPR effect, the sensor achieves a sensitivity of 2.32 × 1011 nm/M and a limit of detection (LOD) of 0.43 pM. It also demonstrates exceptional specificity, stability, and reproducibility, making it suitable for various applications in water pollution, biomedicine, and food safety.

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“…Currently, there are common techniques employed for the detection of Hcy or Zn 2+ , such as atomic absorption spectroscopy (AAS), fluorescence, electrochemical methods, inductively coupled plasma mass spectrometry (ICP–MS), , and isotopic dilution mass spectrometry, , which provide sensitive, selective, and reproducible results, but they typically require expensive and sophisticated instruments, highly expensive that they are unsuitable for on-site analyses.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of 1H-Imidazole-4,5-dicarboxylic Acid-Functionalized Silver Nanoparticles: Dual Colorimetric Sensors of Zn²⁺ and Homocysteine

Mondal

Yarger

2022

ACS Omega

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A colorimetric assay has been developed for Zn 2+ and homocysteine (Hcy) detection using functionalized silver nanoparticles (AgNPs). AgNPs have been synthesized using silver nitrate, where sodium citrate is used as a stabilizing agent and NaBH 4 as a reducing agent. Then, the nanoparticles (citrate@AgNPs) were functionalized with 1 H -imidazole-4,5-dicarboxylic acid (IDCA). UV–visible and FTIR spectra suggested that IDCA was functionalized on the surface of citrate@AgNPs through the N atom of the imidazole ring. The IDCA-functionalized silver nanoparticles (IDCA@AgNPs) simultaneously detected Zn 2+ and Hcy from aqueous solution and showed different responses to the two analytes (Zn 2+ and Hcy) based on the aggregation-induced color change of IDCA@AgNPs. They showed the color change from yellow to red, which was easily discriminated by visual inspection as well as UV–visible spectroscopy. The surface plasmon resonance absorbance values of Zn 2+ and Hcy are 485 and 512 nm, respectively, when Zn 2+ and Hcy react with IDCA@AgNPs. IDCA@AgNPs showed linearity with Zn 2+ and Hcy concentrations, with the detection limit of 2.38 μM and 0.54 nM, respectively (S/N = 3). The IDCA@AgNPs showed excellent selectivity toward Zn 2+ and Hcy compared to the different metal ions and amino acids, respectively. Optimal detection was achieved toward Zn 2+ and Hcy in the pH range 3–10. In addition, IDCA@AgNPs were used to detect Zn 2+ and Hcy from lake water, showing low interference.

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Preconcentration and Determination of Trace Amounts of Heavy Metals in Water Samples Using Membrane Disk and Flame Atomic Absorption Spectrometry

Cited by 26 publications

References 32 publications

An alternative method of dispersive solid‐phase extracting Hg (II) from environmental aqueous solutions using carboxylic functionalized carbon nanotubes

An alternative method of dispersive solid‐phase extracting Hg (II) from environmental aqueous solutions using carboxylic functionalized carbon nanotubes

Advanced Integration of Glutathione-Functionalized Optical Fiber SPR Sensor for Ultra-Sensitive Detection of Lead Ions

Synthesis and Characterization of 1H-Imidazole-4,5-dicarboxylic Acid-Functionalized Silver Nanoparticles: Dual Colorimetric Sensors of Zn²⁺ and Homocysteine

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Preconcentration and Determination of Trace Amounts of Heavy Metals in Water Samples Using Membrane Disk and Flame Atomic Absorption Spectrometry

Cited by 26 publications

References 32 publications

An alternative method of dispersive solid‐phase extracting Hg (II) from environmental aqueous solutions using carboxylic functionalized carbon nanotubes

An alternative method of dispersive solid‐phase extracting Hg (II) from environmental aqueous solutions using carboxylic functionalized carbon nanotubes

Advanced Integration of Glutathione-Functionalized Optical Fiber SPR Sensor for Ultra-Sensitive Detection of Lead Ions

Synthesis and Characterization of 1H-Imidazole-4,5-dicarboxylic Acid-Functionalized Silver Nanoparticles: Dual Colorimetric Sensors of Zn2+ and Homocysteine

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Synthesis and Characterization of 1H-Imidazole-4,5-dicarboxylic Acid-Functionalized Silver Nanoparticles: Dual Colorimetric Sensors of Zn²⁺ and Homocysteine