Dithizone immobilized silica gel on-line preconcentration of trace copper with detection by flame atomic absorption spectrometry

Yu, Hongmei; Shu, Hua; Chen, Mingli

doi:10.1016/j.talanta.2011.04.039

Cited by 62 publications

(24 citation statements)

References 28 publications

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“…Silica gel has attracted great interest as solid support, because it presents a relatively extended surface area, high mechanical strength, high degree of surface reactivity; besides, it does not swell in organic solvents and has low resistance to fluid passage at a high flow rate [10]. Many approaches to the chemical modification of silica gel with various chelating ligands, such as 1,3-diaminepropane-3-propyl [10], 3(1-imidazolyl)propyl [11], amidoamidoxime [12], dithizone [13], p-dimethylaminobenzaldehyde [14], p-toluenesulfonylamide [15], 2-aminoethyl-3-a m i n o b u t y l m e t h y l d i m e t h o x y s i l a n e [ 1 6 ] a n d 4 -aminophenylarsonic acid [17] were described in the literature. Other alternatives, based on sol-gel preparation of inorganic materials by grafting metal oxides M x O y , such as TiO 2 , ZrO 2 , Nb 2 O 5 , and Al 2 O 3, or mixed oxides on SiO 2 , can also be exploited for obtaining a new adsorbent for metals ions, although a few analytical applications were reported [18].…”

Section: Introductionmentioning

confidence: 99%

Flow injection on-line minicolumn preconcentration and determination of trace copper ions using an alumina/titanium oxide grafted silica matrix and FAAS

et al. 2012

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We describe the analytical performance of a hybrid material composed of SiO 2 , Al 2 O 3 and TiO 2 . It was prepared by a sol-gel process and can act as an adsorbent in the continuous-flow enrichment of copper. A minicolumn was packed with the material, copper ions are adsorbed at pH 9.13, then eluted with 1.0 mol L −1 nitric acid, and determined by FAAS. The material was characterized by infrared spectroscopy, scanning electron and energy dispersive spectroscopy, energy dispersive X-ray fluorescence analysis, powder Xray diffraction, and specific surface area analysis. No significant interference was observed for most ions in up to copper/ interferent ratios of 1:100 and of 1:500 in case of Ca(II), Ba (II), and Mg(II). The breakthrough capacity is 1.4 mg g −1 under dynamic conditions. The limits of detection and of quantification are 0.50 and 1.4 μg L −1 , respectively, and the calibration plot is linear in the range from 5.0 to 245.0 μg L −1 (r00.999). The relative standard deviation is 3.20 (for n07 and at a Cu(II) concentration of 10 μg L −1 ). The method was applied to the determination of trace copper ions in water, vegetable and alcohol fuel samples.

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Section: Introductionmentioning

confidence: 99%

Flow injection on-line minicolumn preconcentration and determination of trace copper ions using an alumina/titanium oxide grafted silica matrix and FAAS

et al. 2012

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“…54 The dynamic sorption capacity of modified silica gel 20 with respect to Cu 2+ is 0.76 mg g 71 . The practical use of this adsorbent is related to preconcentration of copper present in trace amounts in water of different origin (sea, river, atmospheric and tap water, snow).…”

Section: Adsorbents Based On Non-covalently Modified Silicas Andmentioning

confidence: 97%

Organosilicon ion-exchange and complexing adsorbents

Власова¹,

Оборина²,

Grigoryeva³

et al. 2013

Russ. Chem. Rev.

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Data on the ion-exchange and complexing orga-Data on the ion-exchange and complexing organosilicon adsorbents published during the last 10 ± 12 years, nosilicon adsorbents published during the last 10 ± 12 years, including the results of systematic research of the authors, including the results of systematic research of the authors, are summarized and analyzed. The following types of are summarized and analyzed. The following types of substances are considered: silicas with covalently grafted substances are considered: silicas with covalently grafted modifiers, silicas and aluminosilicates with non-covalently modifiers, silicas and aluminosilicates with non-covalently grafted modifiers and carbofunctional polyorganylsilses-grafted modifiers and carbofunctional polyorganylsilsesquioxanes prepared by polycondensation of appropriate quioxanes prepared by polycondensation of appropriate organosilicon monomers. Adsorbents of these types find organosilicon monomers. Adsorbents of these types find extensive practical use, in particular, as analytical reagents extensive practical use, in particular, as analytical reagents for determination of metals in natural and artificial speci-for determination of metals in natural and artificial specimens, agents for isolation of valuable elements from indus-mens, agents for isolation of valuable elements from industrial wastes and agents for removal of especially hazardous trial wastes and agents for removal of especially hazardous components from wastes and effluents. The bibliography components from wastes and effluents. The bibliography includes 109 references includes 109 references. .

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“…The figures of merit of the proposed FI-FDSE-FAAS method and other selected on-line SPE methods coupled to FAAS [8,10,12,14,15,18,24,[30][31][32][33][34][35][36][37][38][39][40][41][42][43], are compiled in Table S1 (Supplementary Materials). The proposed method features good sensitivity and precision with better or similar detection limits than earlier works for Cu(II) [8,15,31,32,34], Ni(II) [8,[38][39][40], Zn(II) [41][42][43], Pb(II) [8,24], and Cd(II) [24] assays, using a shorter preconcentration time.…”

Section: Analytical Performance Characteristicsmentioning

confidence: 99%

On-Line Fabric Disk Sorptive Extraction via a Flow Preconcentration Platform Coupled with Atomic Absorption Spectrometry for the Determination of Essential and Toxic Elements in Biological Samples

et al. 2018

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Fabric phase sorptive extraction (FPSE) has gained notable attention and interest both in batch and automatic mode utilizing advanced sol-gel derived microextraction sorbents and the hydrophobic/hydrophilic properties of fabric substrates. Recently, the innovative on-line fabric disk sorptive extraction (FDSE) has opened new opportunities in the field of automatic sample preparation (preconcentration/separation). A novel sol-gel sorbent based on caprolactone-dimethylsiloxane-caprolactone block polymer comprised of a non-polar dimethylsiloxane and hydrophilic caprolactone as a coating on hydrophobic polyester fabric substrate and its evaluation in an automatic FDSE system coupled with flame atomic absorption spectrometry (FAAS), is presented for the first time. The capabilities of the proposed flow injection system were assessed for trace Cu(II), Ni(II), Zn(II), Pb(II), and Cd(II) determination in urine samples. The method was based on the on-line formation of target analytes with ammonium pyrrolidine dithiocarbamate (APDC) and their retention onto the surface of the fabric disk medium. Methyl isobutyl ketone (MIBK) was used to elute metal-APDC complexes directly into the nebulizer-burner system of FAAS. For 90 s of preconcentration time, enhancement factors of 250, 130, 185, and 36 and detection limits (3 s) of 0.15, 0.41, 1.62, and 0.49 µg L −1 were obtained for Cu(II), Ni(II), Pb(II), and Cd(II), respectively. For 30 s of preconcentration time, an enhancement factor of 49 and a detection limit of 0.12 µg L −1 was achieved for Zn(II) determination. The precision, expressed as relative standard deviation (RSD), was lower than 3.5% for all metals. The accuracy of the proposed method was sufficient and evaluated by analyzing certified reference materials and biological samples.

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Dithizone immobilized silica gel on-line preconcentration of trace copper with detection by flame atomic absorption spectrometry

Cited by 62 publications

References 28 publications

Flow injection on-line minicolumn preconcentration and determination of trace copper ions using an alumina/titanium oxide grafted silica matrix and FAAS

Flow injection on-line minicolumn preconcentration and determination of trace copper ions using an alumina/titanium oxide grafted silica matrix and FAAS

Organosilicon ion-exchange and complexing adsorbents

On-Line Fabric Disk Sorptive Extraction via a Flow Preconcentration Platform Coupled with Atomic Absorption Spectrometry for the Determination of Essential and Toxic Elements in Biological Samples

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