Copper determination in natural water samples by using FAAS after preconcentration onto amberlite XAD-2 loaded with calmagite

Ferreira, Sérgio Luís Costa; Ferreira, Janeide R; Dantas, Alailson F.; Lemos, Valfredo Azevedo; Araújo, Neyla Margarida Lopo de; Costa, Antônio Celso Spı́nola

doi:10.1016/s0039-9140(99)00230-1

Cited by 96 publications

(16 citation statements)

References 14 publications

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“…Amberlite XAD-2 resin was selected as a support for the naked-eye detection in the solid phase because of its excellent physical and chemical properties. [29][30][31][32] The coating of this resin was confirmed by DR-UV-Vis spectrophotometer, and the result shows that the maximum absorbance of BF2-curcumin on Amberlite XAD-2 resin at 498 nm constantly increased with the concentration of BF2-curcumin (Fig. 4).…”

Section: As(iii) Detection In the Solid Systemmentioning

confidence: 81%

Naked-eye and Colorimetric Detection of Arsenic(III) Using Difluoroboron-curcumin in Aqueous and Resin Bead Support Systems

et al. 2014

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This work presents a new colorimetric method that is simple, rapid and cost effective for the determination of arsenic(III) in water samples. The method is based on changes in the absorbance of difluoroboron-curcumin (BF2-curcumin), prepared by the reaction of borontrifluoride diethyletherate ((C2H5)2OBF3) and curcumin. The BF2-curcumin was dissolved in 60% ethanol, which yielded an orange solution with the maximum absorbance at 509 nm. Upon the addition of arsenic(III), the color of the BF2-curcumin solution changed from orange to blue and the absorbance was measured by UV-visible spectrometry at 632 nm. The BF2-curcumin was applicable in both solution and coated resin. Under the optimal conditions, the detection limits achieved by means of UV-visible spectrometry, naked-eye detection with BF2-curcumin solution and naked-eye detection with BF2-curcumin-coated resin were found to be 0.26, 25 and 30 μM, respectively.

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Section: As(iii) Detection In the Solid Systemmentioning

confidence: 81%

Naked-eye and Colorimetric Detection of Arsenic(III) Using Difluoroboron-curcumin in Aqueous and Resin Bead Support Systems

et al. 2014

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“…There are still many questions with respect to the role and the distribution of trace amounts of copper(II) in living bodies, and therefore, sensitive determinations of trace amounts of copper(II) are very important to elucidate them. Various methods for the determination of copper have been reported: atomic absorption spectrometry (AAS), 1,2 inductively coupled plasma emission spectrometry (ICP-ES), 3 electroanalysis, 4 and spectrometric methods. [5][6][7] While there are many spectrophotometric methods for the determination of copper(II), most of them are not satisfactory, showing low sensitivity, low reproducibility, time-consuming procedure, the use of large amounts of organic solvent and interference from foreign substances.…”

Section: Introductionmentioning

confidence: 99%

Spectrophotometric Determination of Copper(II) with o-Bromophenylfluorone

et al. 2009

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A simple, reliable and sensitive spectrophotometric method for the determination of copper(II) was established with o-bromophenylfluorone (OBPF), a novel chemical probe, in the presence of poly(N-vinylpyrrolidone). Beer's law was obeyed in the range of 8 -160 ng ml -1 , with an apparent molar absorptivity at 570 nm, the relative standard deviation being 3.64 × 10 5 dm 3 mol -1 cm -1 and 0.72% (n = 5). This method was applied to the recovery tests of copper(II) in human urine, bovine serum and tap water; the results were satisfactory.

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“…Many methods [1][2][3][4][5][6][7][8][9][10][11][12][13] have been reported for copper determination, which include spectrophotometric detection, 1 flow system with in-line separation/preconcentration coupled to graphite furnace atomicabsorption spectrometry, 2 and atomic absorption spectrometry. [3][4][5][6] Among them, the kinetic-catalytic method gives high sensitivity and sufficient accuracy without the need for expensive and special equipment. [7][8][9][10][11][12][13] Various indicator reactions for the kinetic-catalytic determination of copper have been reported.…”

Section: Introductionmentioning

confidence: 99%

A Kinetic Method for the Determination of Copper(II) by Its Catalytic Effect on the Oxidation of 3-Methyl-2-benzothiazolinone Hydrazone with Hydrogen Peroxide: A Mechanistic Study

et al. 2005

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A catalytic spectrophotometric method for the determination of traces of copper(II) is proposed. 3-Methyl-2-benzothiazolinone hydrazone (MBTH) is oxidized by hydrogen peroxide to form a yellowish-brown compound. The reaction is accelerated by trace amounts of copper(II), and can be followed by measuring the increase in the absorbance at 390 nm. Since the absorbance at 40 min from the reaction start increases with an increase in the copper(II) concentration, the absorbance value is used as a parameter for copper(II) determination. Under the optimum experimental conditions (8.4 × 10 -3 mol dm -3 MBTH, 0.7 mol dm -3 hydrogen peroxide, pH 5.2, 35˚C), copper(II) can be determined in the range 0 -50 µg dm -3 . The relative standard deviations are 6.9, 3.5, 2.7% for 2, 20 and 40 µg dm -3 , respectively. The detection limit of this method (3σ) is 0.27 µg dm -3 . It was successfully applied to a determination of copper(II) in river water, tap water and ground-water samples. According to the results of a kinetic study, a mechanism is proposed which leads to the following rate equation: R0cat = kK1K2[MBTH

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Copper determination in natural water samples by using FAAS after preconcentration onto amberlite XAD-2 loaded with calmagite

Cited by 96 publications

References 14 publications

Naked-eye and Colorimetric Detection of Arsenic(III) Using Difluoroboron-curcumin in Aqueous and Resin Bead Support Systems

Naked-eye and Colorimetric Detection of Arsenic(III) Using Difluoroboron-curcumin in Aqueous and Resin Bead Support Systems

Spectrophotometric Determination of Copper(II) with o-Bromophenylfluorone

A Kinetic Method for the Determination of Copper(II) by Its Catalytic Effect on the Oxidation of 3-Methyl-2-benzothiazolinone Hydrazone with Hydrogen Peroxide: A Mechanistic Study

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