Rapid spectrophotometric determination of copper in iron, steel and ferrous alloys

Wetlesen, C.U.

doi:10.1016/s0003-2670(00)89928-6

Cited by 19 publications

(5 citation statements)

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“…Because of the existence of four nitrogens as donor atoms with lipophilic property of ionophore OABCH, it seems to form strong complexes with transition metal ions [19,20]. Thus, in primary experiments, for comparison purposes the OABCH was used as neutral ionophore to prepare several PVC membrane ion-selective electrodes under identical conditions for a variety of metal ions including alkali, alkaline earth, transition and heavy metal ions.…”

Section: Resultsmentioning

confidence: 99%

Chromium(III) Ion Selective Electrode Based on Oxalic Acid Bis(Cyclohexylidene Hydrazide)

Gholivand

Raheedayat

2004

Electroanalysis

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A poly(vinyl chloride) membrane sensor based on oxalic acid bis (cyclohexylidene hydrazide) as membrane carrier was prepared and investigated as a Cr(III)-selective electrode. The electrode reveals a Nernstian behavior (slope 19.8 AE 0.4 mV decade À1) over a wide Cr(III) ion concentration range 1.0 Â 10 À7 ± 1.0 Â 10 À2 mol dm À3 with a very low limit of detection (i.e., down to 6.3 Â 10 À8 mol dm À3). The potentiometric response of the sensor is independent of the pH of the test solution in the pH range 1.7 ± 6.5. The electrode possesses advantage of very fast response, relatively long lifetime and especially good selectivity to wide variety of other cations. The sensor was used as an indicator electrode, in the potentiometric titration of chromium ion and in the determination of Cr(III) in waste water and alloy samples.

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Section: Resultsmentioning

confidence: 99%

Chromium(III) Ion Selective Electrode Based on Oxalic Acid Bis(Cyclohexylidene Hydrazide)

Gholivand

Raheedayat

2004

Electroanalysis

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“…The dialysate was not shaken or stirred during the experiment. After removal of the dialysis units at selected time points, the concentration of dissolved copper in the dialysate was measured by a calibrated spectrophotometric method using oxalic acid bis(cyclohexylidene hydrazide) as a copper chelating agent [34]. Absorbance of the copper-cuprizone complex was measured at 600 nm.…”

Section: Methodsmentioning

confidence: 99%

Generation of oxidant response to copper and iron nanoparticles and salts: Stimulation by ascorbate

Rice

Vidrio

Kumfer

et al. 2009

Chemico-Biological Interactions

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The present work describes a two-stage approach to analyzing combustion-generated samples for their potential to produce oxidant stress. This approach is illustrated with the two commonly encountered transition metals, copper and iron. First, their abilities to generate hydroxyl radical were measured in a cell-free, phosphate-buffered saline solution containing ascorbate and/or citrate. Second, their abilities to induce heme oxygenase-1 in cultured human epidermal keratinocytes were assessed in cell culture. Combustion-generated copper oxide nanoparticles were active in both assays and were found to be soluble in culture medium. Depletion of glutathione in the cells or loading the cells with ascorbate greatly increased heme oxygenase-1 induction in the presence of copper. By contrast, iron oxide nanoparticles were active in the phosphate buffered saline but not in cell culture, and they aggregated in culture medium. Soluble salts of copper and iron exhibited the same contrast in activities as the respective combustion-generated particles. The results suggest that the capability of combustion-generated environmental samples to produce oxidant stress can be screened effectively in a two step process, first in phosphate buffered saline with ascorbate and subsequently in epithelial cell culture for those exhibiting activity initially. The results also point to an unanticipated interaction in cells of oxidant stress-generating metals with an anti-oxidant (ascorbate) that is usually missing in culture medium formulations. Thus, ascorbate supplementation of cultured human cells is likely to improve their ability to model the in vivo effects of particulate matter containing copper and other redox-active metals.

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“…COPPER By reaction of copper with bicyclohexanone oxalyldihydrazone at pH 7.5 in ammonium citrate solution, a color complex is formed which can be measured without separation of the copper from the steel (80,172). Copper can be separated from ferrous alloys by use of fluoboric acid (50%), which dissolves cast iron leaving the copper behind in insoluble form.…”

Section: Niobiummentioning

confidence: 99%

Ferrous Metallurgy

Beeghly¹

1959

Anal. Chem.

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Rapid spectrophotometric determination of copper in iron, steel and ferrous alloys

Cited by 19 publications

References 1 publication

Chromium(III) Ion Selective Electrode Based on Oxalic Acid Bis(Cyclohexylidene Hydrazide)

Chromium(III) Ion Selective Electrode Based on Oxalic Acid Bis(Cyclohexylidene Hydrazide)

Generation of oxidant response to copper and iron nanoparticles and salts: Stimulation by ascorbate

Ferrous Metallurgy

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