Preconcentration of ultra-trace copper in water samples with nanometer-size TiO2 colloid and determination by GFAAS with slurry sampling

Sun, Qian; Zhang, Sijing; Huang, Zhen; Xiao, Mao; Huang, Fei

doi:10.1007/s00604-009-0191-x

Cited by 21 publications

(9 citation statements)

References 22 publications

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“…However, we did not detect the release of Ni from NiO at pH 7.00 and above. Almost similar behaviors were observed for the dissolution of the oxides of zinc [14] and titanium [15].…”

Section: Characterization Of Niosupporting

confidence: 75%

Cation exchange removal of Pb from aqueous solution by sorption onto NiO

Akhtar

Saddique

Mustafa

et al. 2009

Journal of Hazardous Materials

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“…However, we did not detect the release of Ni from NiO at pH 7.00 and above. Almost similar behaviors were observed for the dissolution of the oxides of zinc [14] and titanium [15].…”

Section: Characterization Of Niosupporting

confidence: 75%

Cation exchange removal of Pb from aqueous solution by sorption onto NiO

Akhtar

Saddique

Mustafa

et al. 2009

Journal of Hazardous Materials

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“…In recent years, we have focused on the application of TiO 2 colloid to the separation and enrichment of trace elements. 20,21 Compared with nano-sized TiO 2 powder, TiO 2 colloid has stronger adsorption ability and higher adsorption efficiency due to a smaller grain size and a larger specific surface. TiO 2 colloid is more stable and more dispersive in water without agglomeration.…”

Section: Introductionmentioning

confidence: 99%

Preconcentration of ultra-trace germanium in water samples with nano-sized TiO₂colloid and determination by GFAAS with colloid sampling

Liu

Zhang

Lü

et al. 2012

J. Anal. At. Spectrom.

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A method for preconcentration and determination of ultra-trace germanium is presented in this work. Germanium (Ge(IV) in this work) in the water samples was preconcentrated by applying nano-sized TiO 2 colloid as adsorbent. When the pH values of solution were 6.0-8.0, the adsorption efficiency of nano-sized TiO 2 colloid for germanium reached 97.0 $ 99.0% in a short time. After centrifugation, the sediment which contained the concentrated Ge(IV) was inverted to colloid by adding HNO 3 of certain concentration. Ge(IV) in colloid was determined by graphite furnace atomic absorption spectrometry (GFAAS). In this study, germanium was approximately 20 times concentrated and a low detection limit (3s) of 43 ng L À1 was achieved. As the adsorbed Ge(IV) in colloid could be directly determined by means of GFAAS, desorption process was not needed, which simplified the process. This method was applied for the determination of ultra-trace germanium in water samples and satisfactory results were obtained.

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“…[12][13][14][15][16] Compared with nanosized TiO 2 powder, the colloids possess the advantage of easily changing from the solid phase to the colloid phase aer adsorption and centrifugation. The required input of colloids is low because of their high adsorption capacity, and an autosampler can be used because the viscosity of the resulting solution is close to that of the aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, our research group has been working on the analysis of ultra-trace metal ions using nano-sized TiO 2 colloids as an adsorbent paired with highly sensitive HG-AFS and GFAAS, yielding promising results. [12][13][14][15][16] Compared with nanosized TiO 2 powder, the colloids possess the advantage of easily changing from the solid phase to the colloid phase aer adsorption and centrifugation. The required input of colloids is low because of their high adsorption capacity, and an autosampler can be used because the viscosity of the resulting solution is close to that of the aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

Speciation analysis of antimony in water samples via combined nano-sized TiO₂ colloid Preconcentration and AFS analysis

Wang

Zhang

et al. 2014

J. Anal. At. Spectrom.

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A method for the speciation of Sb(III) and Sb(V) in water samples was developed using nano-sized TiO 2 colloids as adsorbent and hydride generation atomic fluorescence spectrometry (HG-AFS) as a determination technique. The adsorption efficiency for Sb(III) and Sb(V) exceeded 98.0% within a short time when the pH was 6.0. Two carrier acid solutions, citric acid (1%) for Sb(III) and HCl (2%) for total Sb, were used. After the determinations of Sb(III) and total Sb, Sb(V) could be calculated by their difference.The effects of certain conditions on the ratio of Sb(III)/Sb(V) and the presence of coexisting ions were studied. The enrichment factor for both Sb(III) and total Sb was 20. The detection limits of this method were 10 ng L À1 for Sb(III) and 13 ng L À1 for total Sb. The relative standard deviations (n ¼ 6) were 6.7% for Sb(III) and 4.4% for total Sb, demonstrating good analytical precision. The accuracy of the proposed method was validated with an environmental water sample certified reference material (GSB 07-1376(GSB 07- -2001) with a Sb(III) concentration of 1.24 AE 0.26 mg L À1 . The obtained Sb(III) concentration was 1.22 AE 0.03 mg L À1 , which was in good agreement with the certified value. The developed method was simple, fast and sensitive without any filtration or desorption steps and provided low detection limits for Sb (III) and Sb(V).

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Preconcentration of ultra-trace copper in water samples with nanometer-size TiO2 colloid and determination by GFAAS with slurry sampling

Cited by 21 publications

References 22 publications

Cation exchange removal of Pb from aqueous solution by sorption onto NiO

Cation exchange removal of Pb from aqueous solution by sorption onto NiO

Preconcentration of ultra-trace germanium in water samples with nano-sized TiO₂colloid and determination by GFAAS with colloid sampling

Speciation analysis of antimony in water samples via combined nano-sized TiO₂ colloid Preconcentration and AFS analysis

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Preconcentration of ultra-trace copper in water samples with nanometer-size TiO2 colloid and determination by GFAAS with slurry sampling

Cited by 21 publications

References 22 publications

Cation exchange removal of Pb from aqueous solution by sorption onto NiO

Cation exchange removal of Pb from aqueous solution by sorption onto NiO

Preconcentration of ultra-trace germanium in water samples with nano-sized TiO2colloid and determination by GFAAS with colloid sampling

Speciation analysis of antimony in water samples via combined nano-sized TiO2 colloid Preconcentration and AFS analysis

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Product

Resources

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Preconcentration of ultra-trace germanium in water samples with nano-sized TiO₂colloid and determination by GFAAS with colloid sampling

Speciation analysis of antimony in water samples via combined nano-sized TiO₂ colloid Preconcentration and AFS analysis