Field Determination of Cr(VI) in Water At Low PPB Level

Ososkov, Victor; Kebbekus, Barbara B.; Chesbro, David

doi:10.1080/00032719608001527

Cited by 24 publications

(11 citation statements)

References 10 publications

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“…The detailed characterization of the anodized TiO 2 nanotubes on Ti mesh, SEM and XRD, has been described previously [34]. The concentration of Cr(VI) was evaluated by UV-vis spectrometry (SCINCO, S-3150, Korea) using the colorimetrical method (1.5-diphenylcarbazide method) [38,39]. The concentrations of BPA, EE2 and E2 were determined using HPLC-MS and HPLCfluorescence (Agilent 6410 and 1200, USA).…”

Section: Surface Characterization and Water Quality Analysismentioning

confidence: 99%

Simultaneously photocatalytic treatment of hexavalent chromium (Cr(VI)) and endocrine disrupting compounds (EDCs) using rotating reactor under solar irradiation

Kim

Joo

Her

et al. 2015

Journal of Hazardous Materials

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Section: Surface Characterization and Water Quality Analysismentioning

confidence: 99%

Simultaneously photocatalytic treatment of hexavalent chromium (Cr(VI)) and endocrine disrupting compounds (EDCs) using rotating reactor under solar irradiation

Kim

Joo

Her

et al. 2015

Journal of Hazardous Materials

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“…2 Thus, the valency determination of chromium is of first importance from a health point of view and many techniques are utilized for the determination of the stochiometry of chromium compounds. The most commonly used are UV/visible spectroscopy, [3][4][5] atomic absorption spectroscopy, 6 electrochemical techniques, 7,8 electrophoretic techniques 9 and ion chromatographic analysis. 10 However, all these techniques use liquid samples, and oxidation or reduction reactions can occur during the dissolving of the chromium compounds.…”

mentioning

confidence: 99%

Studies of the chromium oxygenated cluster ions produced during the laser ablation of chromium oxides by laser ablation/ionization Fourier transform ion cyclotron resonance mass spectrometry

Aubriet¹,

Maunit²,

Courrier³

et al. 1997

Rapid Commun. Mass Spectrom.

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Trivalent and hexavalent chromium oxides have been examined by time-of-flight laser microprobe mass spectrometry and Fourier transform ion cyclotron resonance mass spectrometry (FTICRMS). The positive-ion spectra show a strong correlation with the valency of chromium in the oxide. Thus, the positive cluster ion distribution and the presence of characteristic chromium cluster ions allow us to distinguish the two oxides. Metallic compounds present in industrial environments have been widely studied over the last ten years because of their toxicity. Among them are the chromium compounds, the toxicity of which depends on the metal oxidation state. Indeed, while chromium III is essential as a trace element for the normal functioning of living organisms (50-200 µg is necessary per day), chromium IV is known to have toxic effects on biological systems.1 In particular, it can cause DNA damage, cancer or allergic reactions. Thus, the valency determination of chromium is of first importance from a health point of view and many techniques are utilized for the determination of the stochiometry of chromium compounds. The most commonly used are UV/visible spectroscopy, 3-5 atomic absorption spectroscopy, 6 electrochemical techniques, 7,8 electrophoretic techniques 9 and ion chromatographic analysis.10 However, all these techniques use liquid samples, and oxidation or reduction reactions can occur during the dissolving of the chromium compounds.To overcome this problem, 'in situ' techniques such as Raman spectroscopy 11,12 or X-ray absorption spectroscopy 13 have been used; they require solid samples and thus give results more representative of the valency of the chromium in the original sample. Mass spectrometry coupled with the laser ablation/ionization process is another 'in situ' technique. Poitevin et al. and Hachimi et al. 14,15 have previously established a methodology to discriminate between trivalent and hexavalent chromium compounds by studying the relative intensities of negative cluster ions. Our purpose was to transpose this methodology to the study of positive cluster ions by time-of-flight laser microbe mass spectrometry (TOF-LMMS). In addition, we used the Fourier transform ion cyclotron resonance mass spectrometry (FTICRMS) technique with the aim of obtaining a similar discrimination of both oxides and getting a better understanding of the precursor ions, in particular the CrO + ion, present before the occurrence of clusters. EXPERIMENTAL SETUPTime-of-flight laser microprobe mass spectrometry TOF-LMMS experiments were performed using a LAMMA 500 instrument (Leybold-Heraeus, Germany) in a transmission arrangement. In our modified system 16,17 the second harmonic of a Nd-YAG laser (532 nm) pumps a dye laser (TDL50 D of Quantel, France) which is used for the ionization step. Harmonic frequencies of the dye laser are selected by a holographic network and can be doubled by a doubling crystal cell (DCC). The various wavelengths are separated by a quartz separation prism by adjusting its orientation. The alignment of...

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“…In this analysis, the 1,5-diphenylcarbarzide method was used [24,25]. The structure and morphological characterizations were conducted with a scanning election microscope (SEM, Hitachi S-4700, Japan).…”

Section: Apparatus and Analysismentioning

confidence: 99%

Effect of length of anodized TiO2 tubes on photoreactivity: Photocurrent, Cr(VI) reduction and H2 evolution

Park

Heo

Shim

et al. 2010

Journal of Power Sources

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Field Determination of Cr(VI) in Water At Low PPB Level

Cited by 24 publications

References 10 publications

Simultaneously photocatalytic treatment of hexavalent chromium (Cr(VI)) and endocrine disrupting compounds (EDCs) using rotating reactor under solar irradiation

Simultaneously photocatalytic treatment of hexavalent chromium (Cr(VI)) and endocrine disrupting compounds (EDCs) using rotating reactor under solar irradiation

Studies of the chromium oxygenated cluster ions produced during the laser ablation of chromium oxides by laser ablation/ionization Fourier transform ion cyclotron resonance mass spectrometry

Effect of length of anodized TiO2 tubes on photoreactivity: Photocurrent, Cr(VI) reduction and H2 evolution

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