Hollow fiber liquid phase microextraction combined with electrothermal vaporization ICP-MS for the speciation of inorganic selenium in natural waters

Xia, Linbo; Hu, Bin; Jiang, Zucheng; Wu, Yunli; Chen, Rui; Li, Li

doi:10.1039/b514623b

Cited by 94 publications

(54 citation statements)

References 25 publications

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“…Se(IV) was determined in one portion using the proposed procedure, whereas the sum of Se(IV) and Se(VI) was determined in the other portion after the reduction of Se(VI) to Se(IV) with hydrochloric acid, as described in ref. 19.…”

Section: Preparation Of Real Samplesmentioning

confidence: 99%

“…hydrochloric acid. 9,12,[14][15][16]19 The determination of trace and ultratrace amounts of Se using SPE with or without chelating agent requires using a suitable solid sorbent: non-polar (C-18) sorbent, 10,11,20 26 In this paper, the preconcentration of Se using multiwalled carbon nanotubes (MWCNTs) as solid sorbent and APDC as chelating agent is proposed. Although MWCNTs are commonly used for the preconcentration of metal ions, they have not been yet applied in preconcentration of Se.…”

Section: Spementioning

confidence: 99%

“…electrothermal atomic absorption spectrometry, 15,16 electrothermal vaporization-inductively coupled plasma-mass spectrometry, 14,19 total-reflection X-ray fluorescence spectrometry 17 or energy-dispersive X-ray fluorescence (EDXRF) spectrometry.…”

Section: Spementioning

confidence: 99%

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Determination of selenium by X-ray fluorescence spectrometry using dispersive solid-phase microextraction with multiwalled carbon nanotubes as solid sorbent

Skorek

Turek

Zawisza

et al. 2012

J. Anal. At. Spectrom.

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A dispersive solid-phase microextraction (DSPME) with multiwalled carbon nanotubes (MWCNTs) as solid sorbent and ammonium pyrrolidinedithiocarbamate (APDC) as chelating agent was developed for determination of selenium. In the proposed procedure, the Se(IV)-APDC complex is adsorbed on MWCNTs dispersed in aqueous samples. After the adsorption process, the aqueous samples are filtered and MWCNTs with selenium chelate are collected onto a filter. The loaded filters are directly measured using X-ray fluorescence (XRF) spectrometry. In order to obtain high recovery of the Se ions on MWCNTs, the proposed procedure was optimized for various analytical parameters such as pH, amounts of MWCNTs and APDC, sample volume and time of the sorption process. Under optimized conditions Se ions can be determined with very good recovery (97 AE 3%), precision (RSD ¼ 3.2%) and detection limits (from 0.06 to 0.2 ng mL À1 , depending on counting time and XRF equipment). The effect of common coexisting ions was also investigated. Se(IV) can be determined in the presence of heavy metal ions and alkali metals. The chemical interferences observed for high concentrations of Cu(II), Fe(III), and Zn(II) can be completely eliminated using precipitation with NaOH. The proposed method was applied for the determination of Se in mineral water and biological samples (Lobster Hepatopancreas). The proposed method can also be applied for selenium speciation. The concentration of selenate can be obtained as the difference between the concentration of selenite after and before prereduction of selenate to selenite.

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Section: Preparation Of Real Samplesmentioning

confidence: 99%

Section: Spementioning

confidence: 99%

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Determination of selenium by X-ray fluorescence spectrometry using dispersive solid-phase microextraction with multiwalled carbon nanotubes as solid sorbent

Skorek

Turek

Zawisza

et al. 2012

J. Anal. At. Spectrom.

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“…It was found that the observed value of Se in Take Shima seawater sample which obtained in the present method was twice higher than that in San Francisco Bay (0.44 µg L -1 ) [16] . On the other hand, the total Se in Take Shima seawater was lower than that in East lake water [17] .…”

Section: The Analytical Results Of Oxo-anion Forming Elements In Seawmentioning

confidence: 99%

AN IN-SYRINGE La CO-PRECIPITATION METHOD FOR PRE-CONCENTRATION OF OXO-ANIONS FORMING ELEMENTS IN SEAWATER FOLLOWED BY ICP-MS MEASUREMENT

Rahmi¹,

Zhu²,

Fujimori³

et al. 2015

J.Ris.Kim.

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A lanthanum (La) co-precipitation method was explored for pre-concentration of oxo-anion forming elements followed by measurement with Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The co-precipitation and subsequent washing and elution steps were performed in a 25 mL-volume syringe in order to save the sample consumption and to avoid the contamination from the experimental environment. In the present work, various parameters such as the concentration of La added into the sample solution, the pH, aging time, and so on were optimized to obtain good recoveries and analytical detection limits for V, As, Se, Sb, and W. Generally, in the coprecipitation method, high concentration of precipitant (in this case, La) causes a serious problem of signal memory effect in ICP-MS measurement. To reduce such memory effect, in the present experiment, high level of La was removed by passing the analyte solution (i.e., lanthanum hydroxide dissolved in 1 M HNO3) through a mini column packed with cation-exchange resins. The method thus obtained was evaluated through the measurement of V, As, Se, Sb and W in seawater reference materials (CASS-4 and NASS-5). The recoveries exceeded 80%, and the observed values were in good agreement with the certified values. Thus, the present method was applied to the determination of trace elements in real seawater sample.

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“…Application of the hollow fiber based LPME for extraction of the metal ions before atomic absorption spectrometric determination One decade after introduction of hollow fiber based LPME for enrichment of the organic compounds, the first application of this technique for extraction of inorganic compounds www.intechopen.com was reported (Xia, et al, 2006). In this study extraction of Se (IV) and Se (VI) from water samples before determination by ICP-MS was investigated.…”

Section: 53mentioning

confidence: 99%

Microextraction Techniques as a Sample Preparation Step for Metal Analysis

Biparva¹,

Matin²

2012

Atomic Absorption Spectroscopy

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Hollow fiber liquid phase microextraction combined with electrothermal vaporization ICP-MS for the speciation of inorganic selenium in natural waters

Cited by 94 publications

References 25 publications

Determination of selenium by X-ray fluorescence spectrometry using dispersive solid-phase microextraction with multiwalled carbon nanotubes as solid sorbent

Determination of selenium by X-ray fluorescence spectrometry using dispersive solid-phase microextraction with multiwalled carbon nanotubes as solid sorbent

AN IN-SYRINGE La CO-PRECIPITATION METHOD FOR PRE-CONCENTRATION OF OXO-ANIONS FORMING ELEMENTS IN SEAWATER FOLLOWED BY ICP-MS MEASUREMENT

Microextraction Techniques as a Sample Preparation Step for Metal Analysis

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