Selective and sensitive detection of chromium(VI) in waters using electrospray ionization mass spectrometry

Weldy, Effie; Wolff, Chloe; Miao, Zhixin; Chen, Hao

doi:10.1016/j.scijus.2012.12.003

Cited by 8 publications

(6 citation statements)

References 25 publications

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“…There are several techniques at present for Cr(VI) detection including atomic absorption spectrophotometry (AAS), 36 electrochemical methods, 32 spectrophotometry, 38 and inductively coupled plasma mass spectrometry (ICP-MS). 37 These techniques have some disadvantages such as a required sophisticated laboratory, expensive instruments, and skilled manpower for analysis.…”

Section: Introductionmentioning

confidence: 99%

Peroxidase Mimic Activity of Au–Ag/l-Cys-rGO Nanozyme toward Detection of Cr(VI) Ion in Water: Role of 3,3′,5,5′-Tetramethylbenzidine Adsorption

2019

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This study demonstrated the adsorption behavior of 3,3′,5,5′-tetramethylbenzidine (TMB) on graphene oxide (GO) and L-cysteine functionalized reduced graphene oxide (L-Cys-rGO) sheets for the first time. To investigate the adsorption phenomenon of TMB on GO and L-Cys-rGO sheets, the effect of different pH values, adsorbent concentrations, and adsorption times were explored. The abundant hydroxyl groups contained on the GO surface has played an eminent role in TMB adsorption. The presence of the −SH functional group in the L-Cys molecule facilitates the π−π* and hydrogen bonding interaction between the L-Cys-rGO surface and TMB which results in efficient adsorption. On the basis of this finding, L-Cys-rGO decorated with bimetallic Au−Ag nanoparticles (Au−Ag/L-Cys-rGO) is utilized as peroxidase mimic activity for the TMB oxidation in the presence of H 2 O 2 . The adsorption of TMB on the catalytic surface is essential for the formation of blue color oxidized product (oxTMB); moreover, in the presence of Cr(VI) ion, it promotes the decomposition of H 2 O 2 to •OH radicals which enhances the TMB oxidation rate. On the basis of this mechanism, the proposed colorimetric probe has been utilized for selective and sensitive detection of Cr(VI) ions in aqueous medium up to the lower concentration of 26.39 μM. This work establishes the presence of L-Cys on a graphene oxide surface (L-Cys-rGO) which controls the growth of bimetallic Au−Ag nanoparticles and also helps in the adsorption of TMB on the catalytic surface. Thus, bimetallic Au−Ag nanoparticles-decorated on L-Cys functionalized GO opens a new path for easy naked eye colorimetric detection of environmentally toxic metal ions in an aqueous medium providing bright prospects in environmental monitoring.

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Section: Introductionmentioning

confidence: 99%

Peroxidase Mimic Activity of Au–Ag/l-Cys-rGO Nanozyme toward Detection of Cr(VI) Ion in Water: Role of 3,3′,5,5′-Tetramethylbenzidine Adsorption

2019

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“…Heavy metals can gather and be preserved in the environment which makes them a hazardous health issue for human beings. Among various toxic heavy metals, chromium is one such heavy metal which enters the body and can cause various diseases such as cancer, chronic ulcers, autoimmune disease and even death . The permissible limit of chromium in drinking water is 50–200 µg dL −1 .…”

Section: Introductionmentioning

confidence: 99%

“…Among various toxic heavy metals, chromium is one such heavy metal which enters the body and can cause various diseases such as cancer, chronic ulcers, autoimmune disease and even death. 1 The permissible limit of chromium in drinking water is 50-200 μg dL −1 . 2 The main sources of chromium discharges into the environment causing ecological problems are electroplating, textile production, paint pigments, metal plating, wood industries and so on.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical sensor based on nanostructured ion imprinted polymer for the sensing and extraction of Cr(III) ions from industrial wastewater

Aravind

Mathew

2018

Polymer International

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In the present study we prepared a novel ion imprinted polymer as a sensitive electrochemical sensor for the determination of Cr(III) ion. The Cr(III) ion imprinted polymer was fabricated on a platinum electrode. Due to the presence of a nanolayer on the ion imprinted polymer with specific binding sites, the sensor reacted quickly to Cr(III) ion and can be used for selective extraction of Cr(III) ion. The Cr(III) ion imprinted polymer was prepared by using methacrylic acid as the functional monomer, N,N'‐methylene‐bis‐acrylamide as the crosslinking agent, potassium peroxodisulfate as initiator and Cr(III) ion as the template molecule. Non‐imprinted polymers were also prepared for comparative studies. The synthesized polymer was characterized using Fourier transform IR spectroscopy, TEM, Energy‐dispersive X‐ray spectroscopy and XRD. The limit of detection of the platinum–mutiwalled carbon nanotube ion imprinted polymer sensor was found to be 0.051 µmol L–1 using differential pulse voltammetry. Moreover, the proposed method was effectively used for the sensing and extraction of Cr(III) ion in real samples collected from the metal plating industry. © 2018 Society of Chemical Industry

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“…11,12 Hence, there is an urgent need for a highly sensitive and selective method for the detection of Cr(III) and Mn(II) ions in both environmental and biological samples. 13,14 These heavy metal ions have been detected previously by various methods like electro analytical sensing, 15,16 electrospray ionization mass spectroscopy (EIMS), 17,18 high performance liquid chromatography (HPLC), [19][20][21] inductively coupled plasma mass spectroscopy (ICPMS) [22][23][24] and atomic absorption spectrometry (AAS). [25][26][27] These are reliable techniques for detection; however, they have limitations with regard to simplicity, selectivity, portability and analysis time.…”

Section: Introductionmentioning

confidence: 99%

pH-controlled sensitive and selective detection of Cr(iii) and Mn(ii) by using clove (S. aromaticum) reduced and stabilized silver nanospheres

2016

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Selective and sensitive detection of chromium(VI) in waters using electrospray ionization mass spectrometry

Cited by 8 publications

References 25 publications

Peroxidase Mimic Activity of Au–Ag/l-Cys-rGO Nanozyme toward Detection of Cr(VI) Ion in Water: Role of 3,3′,5,5′-Tetramethylbenzidine Adsorption

Peroxidase Mimic Activity of Au–Ag/l-Cys-rGO Nanozyme toward Detection of Cr(VI) Ion in Water: Role of 3,3′,5,5′-Tetramethylbenzidine Adsorption

Electrochemical sensor based on nanostructured ion imprinted polymer for the sensing and extraction of Cr(III) ions from industrial wastewater

pH-controlled sensitive and selective detection of Cr(iii) and Mn(ii) by using clove (S. aromaticum) reduced and stabilized silver nanospheres

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