Spectrophotometric Determination of Copper with Salicylaldoxime

Simonsen, S. H.; Burnett, H. M.

doi:10.1021/ac60104a039

Cited by 20 publications

(5 citation statements)

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“…The specific activity of the M Cu isolated in the present studies was determined by modifying a spectrophotometric method used in characterisation of aluminium alloys [21], The method is based on the formation of a copper(II) salicylaldoximate complex which has an absorption maximum at 344 nm in amyl acetate. Copper (II) ions contained in a buffered solution of sodium acetate are extracted into amyl acetate upon complexation with salicylaldoxime (present in the amyl acetate).…”

Section: Resultsmentioning

confidence: 99%

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Separation of ⁶⁴Cu from ⁶⁷Ga Waste Products Using Anion Exchange and Low Acid Aqueous/Organic Mixtures

1996

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M Cu / Anion exchange / Radionuclide / 61 Ga waste / Cyclotron / Radionuclide separation SummaryLow acid concentration aqueous/organic mixtures with an anion exchange resin (AG1-X8) have been used to separate carrierfree '"Cu from the by-products of cyclotron produced 67 Ga. The specific activity of the M Cu (5 X10 14 Bq/g) was found to be higher than that reported previously. Trace levels (<1%) of 67 Cu were also present. The new separation method is easier and faster (2 hours) than those currently employed in routine purification of both 67 Cu and "Cu production. We believe that the new method is the first reported use of organic solvents in the separation and purification of these radioisotopes and represents the first effort towards full characterisation of by-products for appropriate waste management.

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Section: Resultsmentioning

confidence: 99%

“…The procedure employed was adapted from a method described by Simonsen and Burnett [21], and the modifications introduced are described below. The activity of these samples was determined using a Capintec CRC-15R dose calibrator.…”

Section: Specific Activity Of 64/67 Cumentioning

confidence: 99%

Separation of ⁶⁴Cu from ⁶⁷Ga Waste Products Using Anion Exchange and Low Acid Aqueous/Organic Mixtures

1996

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“…This process has been extensively studied in the context of industrial extraction; however, the selectivity for various metals by varying pH has been known for a longer period of time. Indeed, the oxime derivative of salicylaldehyde (salicylaldoxime) was studied in the early 20th century and exploited for gravimetric analysis prior to the introduction of more modern analytical techniques. − In this study, we found that methoxyphenolic oxime 2 was particularly effective, since the resulting copper complex ( 3 ) formed very quickly and readily precipitated from the resulting acidic solution (sulfuric acid is released as binding of the methoxyphenolic oxime to Cu 2+ proceeds). Complexation of methoxyphenolic oxime 2 with copper ions has been the subject of research in recent years, most notably by MAS NMR spectroscopy and single-crystal X-ray diffraction .…”

Section: Experimental Overviewmentioning

confidence: 87%

A Simplified Extractive Metallurgy Exercise to Demonstrate Selective Extraction of Copper

et al. 2020

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A laboratory activity is described for senior high school or first year undergraduate level students that illustrates key concepts linked to extractive metallurgy. This experiment demonstrates preferential binding of a methoxyphenolic oxime ligand to Cu 2+ in the presence of other transition metal ions in aqueous solution. The students are tasked to investigate the importance of the spatial relationship between the oxime and phenol group of two potential ligands by performing a series of short and simple tests. The objective is achieved by identifying which methoxyphenolic oxime ligand selectively and rapidly forms an isolable precipitate with Cu 2+ ions. Only one of the potential ligands exhibits a clear preference for binding to Cu 2+ , and this can easily be identified visually (and confirmed by UV−visible spectroscopy if desired). The experiment has successfully been employed as part of an extracurricular laboratory course involving groups of 25−30 high school students.

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“…Copper is extracted at a lower pH with chloroform than with n-amyl acetate. Extraction with the latter solvent has been described by Simonsen and Burnett (10).…”

Section: Resultsmentioning

confidence: 99%

“…Flagg and Furman (6) developed a gravimetric method for copper using salicylaldoxime. As the work reported here was being completed, Simonsen and Burnett (10)…”

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Flame Spectrophotometric Determination of Copper in Ferrous Alloys

Dean¹,

Lady²

1956

Anal. Chem.

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Organic solvent extraction can be applied to the flame spectrophotometric determination of copper in ferrous alloys. Copper, in the form of the salicylaldoxime complex, is selectively extracted from the aqueous solution of the sample with either chloroform or n-amyl acetate.Citrate was employed to buffer the solution at pH 3 and mask the iron, thereby preventing its coextraction.The organic extract is aspirated directly into an oxyacetylene flame. This procedure circumvents interferences encountered when aspirating the bulk sample containing varying amounts of diverse elements and increases the spectral emission of the copper 324.7-mg line tenfold as compared with an aqueous solution of copper.No interferences were found when the method was applied to a wide variety of ferrous alloys. Accurate measurements can be made on as little as 0.5 y of copper per ml.THE application of organic solvent extraction to flame spectrophotometry offers a number of advantages (2). Compared with an aqueous solution, the spectral emission of the element present in the organic extract is generally enhanced severalfold. A selective extraction avoids the introduction of high concentrations of diverse ions into the flame, thus eliminating errors that might arise due to their presence. Also minimized are variations of the physical properties of the aspirated solution, such as viscosity, droplet size, and volatility. The introduction of solutions containing high salt concentration into a flame produces considerable amounts of incandescence, apparently as a result of minute solid particle formation. Solvent extraction also affords a means for concentrating the test element. The authors have previously applied solvent extraction to the flame spectrophotometric determination of iron (3).Copper exhibits two rather sensitive emission lines in the ultraviolet portion of the spectrum at 324.7 and 327.4 µ. In addition, copper possesses a series of weak emission bands in the visible region (11). Lundegárdh (9) observed that the radiant power of copper was strongly dependent upon operating conditions, and that both lines were prone to suffer strong self-absorption.Dean (1) has reported an extensive flame spectrophotometric study of copper and has developed methods for copper applicable to nonferrous alloys. However, interferences from unknown sources prevented the extension of the method to ferrous alloys.Prior to this, several investigators had employed the two emission lines mentioned to determine copper in biological materials (7) and other substances (4). Dean (1) found that the utility of the 324.7-mg line was hindered by self-absorption, and, while not as serious in the case of the 327.4-mg line, the latter line is about one half the radiant power of the former. It seemed desirable to develop a method for copper applicable to ferrous alloys and with sufficient sensitivity to facilitate the analysis of micro amounts of copper.Feigl's general discussion on the behavior of o-hydroxyaldoximes ( ) suggested the utilization of this class of reagents...

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Spectrophotometric Determination of Copper with Salicylaldoxime

Cited by 20 publications

References 7 publications

Separation of ⁶⁴Cu from ⁶⁷Ga Waste Products Using Anion Exchange and Low Acid Aqueous/Organic Mixtures

Separation of ⁶⁴Cu from ⁶⁷Ga Waste Products Using Anion Exchange and Low Acid Aqueous/Organic Mixtures

A Simplified Extractive Metallurgy Exercise to Demonstrate Selective Extraction of Copper

Flame Spectrophotometric Determination of Copper in Ferrous Alloys

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Spectrophotometric Determination of Copper with Salicylaldoxime

Cited by 20 publications

References 7 publications

Separation of 64Cu from 67Ga Waste Products Using Anion Exchange and Low Acid Aqueous/Organic Mixtures

Separation of 64Cu from 67Ga Waste Products Using Anion Exchange and Low Acid Aqueous/Organic Mixtures

A Simplified Extractive Metallurgy Exercise to Demonstrate Selective Extraction of Copper

Flame Spectrophotometric Determination of Copper in Ferrous Alloys

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Separation of ⁶⁴Cu from ⁶⁷Ga Waste Products Using Anion Exchange and Low Acid Aqueous/Organic Mixtures

Separation of ⁶⁴Cu from ⁶⁷Ga Waste Products Using Anion Exchange and Low Acid Aqueous/Organic Mixtures