Application of Ion Exchange Paper to Preconcentration of Chromium (Iii) and Chromium (Vi) in Water for Pixe Analysis

Thomyasirigul, Sureerat; Fukuda, Hitoshi; Hasegawa, Jun; Oguri, Y.; Ratanatamskul, Chavalit

doi:10.1142/s0129083508001296

Cited by 3 publications

(4 citation statements)

References 9 publications

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“…8−14 We have been studying the preconcentration technique using a Whatman DE81-DEAE cellulose paper, a weakly basic anion exchanger with diethylaminoethyl functional groups, to adsorb negatively charged ions in water. 15 The ions collected by the filter are determined by the PIXE analysis, where the filter paper is directly irradiated by MeV protons. By preliminary experiments with Cr(VI) standard solution, we have so far obtained detection sensitivities that are enough to measure ppb-level concentrations; such sensitivities are enough for environmental monitoring of Cr(VI) in water.…”

Section: Introductionmentioning

confidence: 99%

Determination of Chromium(vi) in Water by Pixe Analysis Using Ion Exchange Paper — Limit of Detection and Interference by Coexisting Anions

et al. 2009

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Concerning the PIXE analysis of Cr(VI) in water using ion-exchange filters, the limit of detection (LOD) and the influence of matrix anions were investigated. In order to look for the experimental condition for obtaining the minimum LOD, we measured the Cr-Kα X-ray counts and background counts under the Kα X-ray peak as a function of the incident proton energy and the thickness of the Mylar absorber foil in front of the detector. To investigate the interference by coexisting anions, each of PO4 3− , SO4 2− , NO3 − , Cl − , and F − ions and Cr(VI) ions were mixed in aqueous solutions and adsorbed on DE81-DEAE cellulose paper, a weakly basic anion exchanger with diethylaminoethyl functional groups. Then the filter samples were measured by PIXE using 2.5 MeV proton beams. We obtained a LOD of 0.16 µg or 8 ppb for 20 mL samples at a proton energy of 2.5 MeV and a Mylar film thickness of 50 or 100 µm. The experimental results on the mixed solutions indicated that NO3 − , Cl − , and F − as coexisting ions didn't interfere significantly with determination of a 50 µg/L Cr(VI) concentration for 40 mL total solution volume, despite the total amount of anions was about 90% of ion exchange capacity of a filter. On the other hand, slight interferences by PO4 3− ions were observed. However, under the same condition, we found that if the total amount of SO4 2− ions was higher than 20% of ion exchange capacity, they induced significant interferences in determining Cr(VI).

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Section: Introductionmentioning

confidence: 99%

Determination of Chromium(vi) in Water by Pixe Analysis Using Ion Exchange Paper — Limit of Detection and Interference by Coexisting Anions

et al. 2009

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“…Two types of ion exchange paper, a Whatman cellulose phosphate paper P81 in the ammonium form and a Whatman diethylaminoethyl (DEAE) cellulose paper DE81 in the hydroxyl form, were used to capture cations and anions from aqueous solutions, respectively. The properties of P81 and DE81 have been described elsewhere 7…”

Section: Methodsmentioning

confidence: 99%

“…Back‐scattered protons were measured by a Si surface‐barrier particle detector placed at 150° to monitor the proton dose on the sample. For each proton energy, the relationship between the Cr Kα X‐ray counts and the Cr concentrations was calibrated using standard solutions with defined quantities of both oxidation states as described in previous papers 7, 8…”

Section: Methodsmentioning

confidence: 99%

“…In our previous work,7, 8 the application of Whatman cation exchange cellulose paper (P81) and Whatman anion exchange cellulose paper (DE81) has been successfully demonstrated in determining trace levels of Cr(III) and Cr(VI) in water. However, details of the analysis performance parameters such as accuracy and precision have not yet been reported.…”

Section: Introductionmentioning

confidence: 99%

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Speciation and determination of Cr(III) and Cr(VI) in water by energy‐dispersive PIXE analysis

et al. 2011

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Recently, water contamination by Cr(VI) has resulted in serious environmental problems. Therefore, many countries are changing the regulation of water quality standard from total chromium to Cr(VI). This study was conducted to develop a sample preparation method for the determination of Cr(III) and Cr(VI) in water by energy-dispersive proton-induced X-ray emission spectrometry. Whatman ion exchange celluloses (P81 and DE81) were used for separation and pre-concentration of Cr(III) and Cr(VI) species by filtration, respectively. The dependences of the limit of detection for both chemical species on the incident proton energy, beam current, and measuring time were examined. The accuracy and precision of the proposed method were determined. The results showed that the proposed method allows the separation and determination of Cr(III) and Cr(VI) with a high accuracy and precision.

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Selective and sensitive detection of chromium(VI) in waters using electrospray ionization mass spectrometry

Weldy¹,

Wolff²,

Miao³

et al. 2013

Science & Justice

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Application of Ion Exchange Paper to Preconcentration of Chromium (Iii) and Chromium (Vi) in Water for Pixe Analysis

Cited by 3 publications

References 9 publications

Determination of Chromium(vi) in Water by Pixe Analysis Using Ion Exchange Paper — Limit of Detection and Interference by Coexisting Anions

Determination of Chromium(vi) in Water by Pixe Analysis Using Ion Exchange Paper — Limit of Detection and Interference by Coexisting Anions

Speciation and determination of Cr(III) and Cr(VI) in water by energy‐dispersive PIXE analysis

Selective and sensitive detection of chromium(VI) in waters using electrospray ionization mass spectrometry

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