Separation and determination of molybdenum by inductively coupled plasma optical emission spectrometry using quercetin immobilization on silica gel

Azeredo, Laerte C.; Azeredo, Maria Aparecida Alves; Castro, Rosane Nora; Saldanha, Marcelo Francisco C; Pérez, Daniel Vidal

doi:10.1016/s0584-8547(02)00162-3

Cited by 23 publications

(8 citation statements)

References 13 publications

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“…On the other hand, due to its structure (carbonyl group in C 4 , hydroxyl group in C 3 position in ring A and ortho OH groups in ring B), quercetin easily forms colored complexes with several donor or acceptor agents. Recently, a few studies have been reported on the interaction of quercetin with cyclodextrins [19] and some metal ions [20][21][22][23] among Cr(III) [24], but there is not a report in dealing with Cr(VI) interaction.…”

Section: Introductionmentioning

confidence: 99%

Cr(III)/Cr(VI) speciation determination of chromium in water samples by luminescence quenching of quercetin

Hosseini

Belador

2009

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

Cr(III)/Cr(VI) speciation determination of chromium in water samples by luminescence quenching of quercetin

Hosseini

Belador

2009

Journal of Hazardous Materials

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“…H5Q was also immobilized onto the dextran type sorbent (sephadex-25) and used for the separation of tin (Zaporozhets et al 2001). In addition, Azeredo et al (2002) determined molybdenum in apple leaves after separation on H5Q-functionalized silica gel. The sorbent showed a capacity of 0.089 mmol g −1 toward molybdenum.…”

Section: Introductionmentioning

confidence: 99%

Silica glass modified with flavonoid derivatives for preconcentration of some toxic metal ions in water samples and their determination with ICP-MS

Hassanien

2009

Environ Monit Assess

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Quercetin (3,3',4',5,7-pentahydroxyflavone) chemically bonded through pyran rearrangement on modified controlled pore silica glass (QCPSG) with a capacity 0.213 mmol/g was used for solid phase extraction of some toxic metal and metalloid ions. The newly designed QCPSG quantitatively sorbs As(V), Cd(II), Hg(II), and Pb(II) at the pH range 7.5-8.5 after 10 min of stirring. HCl (1 mol L(-1)) instantaneously elutes all the metal ions. The sorption capacity of the ion collector is 0.42, 0.46, 0.53, and 0.49 mmol g(-1) for As(V), Cd(II), Hg(II), and Pb(II), respectively, whereas the preconcentration factor is 200. The effect of NaCl, Na2SO4, NaF, NaBr, Na3PO4, and other interfering salts on the sorption of metal ions (50 microg L(-1)) was reported. Analytical detection limits of As(V), Cd(II), Hg(II), and Pb(II) were 4.18, 2.44, 15.86, and 25.00 pg mL(-1), respectively. QCPSG was used in the separation of the investigated metal ions from some natural water samples collected from diverse origins followed by determination by inductively coupled plasma-mass spectrometry. The data were compared with those obtained by the standard methods of determination using atomic absorption (hydride generation, HGAAS and after solvent extraction with ammonium pyrolidine dithiocarbamate/methyl isobutyl ketone). The suggested solid phase extraction method was found accurate with no random error.

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“…Its use for the separation of Mn(II), Co(II), Ni(II), Cu(II), and Zn(II) from various samples was reported. In addition, Azeredo et al (17) determined molybdenum in apple leaves after separation on H5Q-functionalized silica gel. The sorbent showed a capacity of 0.089 mmol g 21 towards molybdenum.…”

Section: Kh S Abou-el-sherbini Et Al 3448mentioning

confidence: 99%

Selective Separation and Preconcentration of Total Tin Using Quercetin as Chelating Agent

Abou‐El‐Sherbini

Hassanien

Kenawy

2007

Separation Science and Technology

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Three methods were developed for rapid and selective extraction of total tin as Sn(IV) using quercetin (H5Q) as chelating agent, prior to its determination by hydride generation atomic absorption spectrometry (HGAAS). H5Q was chemically or physically immobilized onto silica gel or polyurethane foam, respectively, and used for the separation of Sn(IV) by the solid phase extraction (SPE) technique. The SPE methods were compared with flotation technique using the oleic acid as surfactant from H5Q solution in amyl alcohol/kerosene solvent. Elemental analysis, thermogravimetry, spectroscopic measurements (IR, UV/vis and magic angle solid state C 13 -NMR) were used to characterize the resulting modified extractors. The experimental conditions for efficient extraction of Sn(IV) such as: pH, time of stirring, interfering ions and eluent concentration, were optimized for the batchwise separation process. The tolerance limits of heavy metal ions in the sorption of Sn(IV) were reported. The methods were applied for the determination of total tin in water samples, zinc shots and canned beans after digestive oxidation. The suggested SPE and flotation techniques were found to be accurate and not subject to random error with especial preference to the SPE technique as it is cheaper and simpler.

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Separation and determination of molybdenum by inductively coupled plasma optical emission spectrometry using quercetin immobilization on silica gel

Cited by 23 publications

References 13 publications

Cr(III)/Cr(VI) speciation determination of chromium in water samples by luminescence quenching of quercetin

Cr(III)/Cr(VI) speciation determination of chromium in water samples by luminescence quenching of quercetin

Silica glass modified with flavonoid derivatives for preconcentration of some toxic metal ions in water samples and their determination with ICP-MS

Selective Separation and Preconcentration of Total Tin Using Quercetin as Chelating Agent

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