Flow Chemiluminescent Determination of Chromium in Stainless Steel

Muto, Kenji; Ohno, Kenichi; Lin, Jin‐Ming

doi:10.2355/tetsutohagane1955.89.9_948

Cited by 5 publications

(3 citation statements)

References 7 publications

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“…There has thus been a growing interest in highly sensitive and selective assays for trace Cr determination. A number of sensitive techniques have been employed, such as atomic absorption spectrophotometry [5], plasma mass spectrometry [6], spectrofluorimetry [7], spectrophotometry [8], and chemiluminescence [9], but each of these processes is time consuming and necessitates expensive equipments. Various sensor systems have also been reported [10–16].…”

Section: Introductionmentioning

confidence: 99%

Flower-like self-assembly of gold nanoparticles for highly sensitive electrochemical detection of chromium(VI)

Ouyang

Bragg

Chambers

et al. 2012

Analytica Chimica Acta

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We report here the fabrication of a flower-like self-assembly of gold nanoparticles (AuNPs) on a glassy carbon electrode (GCE) as a highly sensitive platform for ultratrace Cr(VI) detection. Two AuNPs layers are used in the current approach, in which the first is electroplated on the GCE surface as anchors for binding to an overcoated thiol sol-gel film derived from 3-mercaptopropyltrimethoxysilane (MPTS). The second AuNPs layer is then self-assembled on the surface of the sol-gel film, forming flower-like gold nanoelectrodes enlarging the electrode surface. When functionalized by a thiol pyridinium, the fabricated electrode displays a well-defined peak for selective Cr(VI) reduction with an unusually large, linear concentration range of 10–1,200 ng L−1 and a low detection limit of 2.9 ng L−1. In comparison to previous approaches using MPTS and AuNPs on Au electrodes, the current work expands the use of AuNPs to the GCE. Subsequent functionalization of the secondary AuNPs by a thiol pyridinium and adsorption/preconcentration of Cr(VI) lead to the unusually large detection range and high sensitivity. The stepwise preparation of the electrode has been characterized by electrochemical impedance spectroscopy (EIS), scanning electronic microscopy (SEM), and IR. The newly designed electrode exhibits good stability, and has been successfully employed to measure chromium in a pre-treated blood sample. The method demonstrates acceptable fabrication reproducibility and accuracy.

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Section: Introductionmentioning

confidence: 99%

Flower-like self-assembly of gold nanoparticles for highly sensitive electrochemical detection of chromium(VI)

Ouyang

Bragg

Chambers

et al. 2012

Analytica Chimica Acta

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“…3 The chromate anions pass readily through cell membranes and are easily reduced inside the cell to Cr(III) which binds more effectively to DNA, causing detrimental impairment to cellular components. 4 A number of sensitive techniques have been employed for the determination of Cr, such as atomic adsorption spectrophotometry, 5,6 plasma mass spectrometry, 7 spectrofluorimetry, 8 spectrophotometry, 9 and chemiluminescence, 10,11 but each of these processes is time consuming and necessitates expensive equipment. Various advantages are demonstrated when electrochemical methodologies are utilised for the determination of Cr including speed of analysis, good selectivity and sensitivity, which have resulted in a variety of highly responsive systems, utilising platinum 12 and gold [12][13][14] to be fashioned.…”

Section: Introductionmentioning

confidence: 99%

Graphite screen printed electrodes for the electrochemical sensing of chromium(vi)

Hallam

Kampouris

Kadara

et al. 2010

Analyst

101

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We demonstrate that graphite screen printed macroelectrodes allow the low ppb sensing of chromium(VI) in aqueous solutions over the range 100 to 1000 microg L(-1) with a limit of detection of 19 microg L(-1). The underlying electrochemical mechanism is explored indicating an indirect process involving surface oxygenated species. The drawbacks of using hydrochloric acid as a model solution to evaluate the electrochemical detection of chromium(VI) are also pointed out. The analytical protocol is shown to be applicable for the sensing of chromium(VI) in canal water samples at levels set by the World Health Organisation. The protocol is simplified over existing analytical methodologies and given its analytical performance and economical nature, holds promise for the de-centralised screening of chromium(VI).

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“…Currently, these include ion chromatography, atomic absorption (AA) spectrophotometry, spectrofluorimetry, spectrophotometry, chemiluminescence, inductively coupled plasma optical emission spectroscopy (ICP-OES), inductively coupled plasma mass spectrometry (ICP-MS), and capillary zone electrophoresis [13-17]. Electrochemical methods are attractive because of their sensitivity, portability, and relatively low cost in comparison to other common techniques [18-35].…”

Section: Introductionmentioning

confidence: 99%

Highly sensitive detection of hexavalent chromium utilizing a sol-gel/carbon nanotube modified electrode

Rosolina

Bragg

Ouyang

et al. 2016

Journal of Electroanalytical Chemistry

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A pyridine-functionalized thin film has been fabricated to selectively preconcentrate Cr(VI) anions for electrochemical detection in the 5-300 μg L−1 range. Glassy carbon electrodes were modified through physical deposition of single-walled carbon nanotubes (SWNTs) on the electrode surface, followed by electrochemical deposition of a sol-gel containing a 2-pyridine functional group. The use of SWNTs has increased sensitivity for Cr(VI) detection in aqueous solutions, providing a detection limit of 0.8 μg L−1.

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Flow Chemiluminescent Determination of Chromium in Stainless Steel

Cited by 5 publications

References 7 publications

Flower-like self-assembly of gold nanoparticles for highly sensitive electrochemical detection of chromium(VI)

Flower-like self-assembly of gold nanoparticles for highly sensitive electrochemical detection of chromium(VI)

Graphite screen printed electrodes for the electrochemical sensing of chromium(vi)

Highly sensitive detection of hexavalent chromium utilizing a sol-gel/carbon nanotube modified electrode

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