Determination of trace impurities in tantalum by inductively coupled plasma mass spectrometry after removal of the matrix by liquid-liquid extraction

Panday, V.K.; Becker, J. Sabine; Dietze, H.-J.

doi:10.1016/0003-2670(96)00138-9

Cited by 26 publications

(17 citation statements)

References 8 publications

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“…Therefore, specifications of the alloys must be strictly controlled and materials with high neutron absorption cross-section such as Hf, B, Cd, Gd, and Sm are required. To achieve this, it is necessary to analyze impurities in high-purity Zr materials before they are used in nuclear reactors [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…Inductively coupled plasma mass spectrometry (ICP-MS) is a modern analytical method having the advantages of high sensitivity, low spectral interference, and low matrix effects. Some applications of ICP-MS for determination of impurities in Zr materials (ZrO 2 , Zircaloy 360a, ZrOCl 2 , ZrCl 4 ) are detailed in many studies [5][6][7][8][9][10][11][12][13]. Impurities (or trace elements) with high content can be directly determined by ICP-MS using matching matrix and internal standard (e.g., In, Bi, Rh).…”

Section: Introductionmentioning

confidence: 99%

“…In addition, approximately 99.7% of Zr matrix was extracted from 2 M HNO 3 and impurities have been determined with RSD of less than 14% and Rev ranging from 89 to 110%. In the similar investigation with regard to zircaloys [7], many impurities have been determined by isotope dilution-ICP-MS after removal of the Zr matrix by liquid-liquid extraction using D2EHPA/toluene. In this research, the Zr matrix was extracted from HNO 3 with pH = 2 and 16 impurities that have been fully scrubbed by 6 M HNO 3 .…”

Section: Introductionmentioning

confidence: 99%

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Nano ZrO2 Synthesis by Extraction of Zr(IV) from ZrO(NO3)2 by PC88A, and Determination of Extraction Impurities by ICP-MS

Chu

Nguyễn

Truong

et al. 2018

Metals

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High purity Zirconium (Zr) materials are essential in many components of nuclear reactors, especially fuel cladding tubes. Due to the matrix influence, determination of impurities in the Zr materials requires separation from the Zr matrix. Among extraction methods, solvent extraction is common and suitable for large-scale production. In this study, extraction capability of Zr(IV) by 2-ethylhexyl phosphonic acid mono 2-ethylhexyl ester (PC88A) was examined by FT-IR and UV of ZrO(NO3)2 salt, PC88A-toluene solvent, and Zr-PC88A-toluene complex. ZrO2 (obtained from Institute for Technology of Radioactive and Rare Elements—ITRRE), after being separated from the Zr matrix, was determined for impurities using internal standard (indium, In) by 50% of PC88A dissolved in toluene. Separation of impurities from the Zr matrix underwent two stages. First, one cycle of extraction of the Zr matrix and impurities in 3 M HNO3 using 50% PC88A/toluene was conducted. Second, impurities were scrubbed by 4 M HNO3 in two cycles. Results revealed that approximately 74% of Zr(IV) was separated to the organic phase and 26% remained in the aqueous phase. Determination of impurities after separation from the Zr matrix by ICP-MS using internal standard in revealed that the recovery of impurities achieved 95–100%. With the mentioned amount of Zr, the effect of the Zr matrix on the determination of elements by ICP-MS is negligible. Levels of impurities have relative standard deviations (RSD) of less than 6.9% and recovery of 88.6–98.8%. Therefore, the determination of impurities has high reliability and accuracy. The back-extraction of Zr(IV) in organic phase by 1 M H2SO4 has stripped about 99.5% of the Zr matrix back to the aqueous phase. Following this, NH3 was added to the solution containing Zr after back-extraction to form Zr(OH)4 which was then desiccated to produce ZrO2. X-ray Diffraction (XRD), Scanning and Transmission Electron Microscopy (SEM and TEM) images showed that the new ZrO2 product has spherical nanostructure with diameters of less than 25 nm, which is suitable for applications for the treatment of colorants, metal ions in wastewater sources and manufacture of anti-corrosion steel. In addition, the energy dispersive X-ray (EDX) of the new ZrO2 product showed that it has high purity.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nano ZrO2 Synthesis by Extraction of Zr(IV) from ZrO(NO3)2 by PC88A, and Determination of Extraction Impurities by ICP-MS

Chu

Nguyễn

Truong

et al. 2018

Metals

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“…Organophosphorus compounds includes TBP, D2EHPA and PC88A were effective extractants for tetravalent metals, particularly for zirconium (IV) by solvent extraction (Pandey et al 1995 1403 from the matrix to eliminate the interference of the matrix and determination of them by ICP-MS using the internal standard In. Although PC88A has been known long time ago as an extractant for trace amounts of Zr (B. Ramachandra Reddy et al 2004), its application for removing Zr matrix from a dissolved ZrCl 4 sample was not studied.…”

Section: Issn: 2320-5407mentioning

confidence: 99%

INVESTIGATION OF DIRECT DETEMINATION OF MANY IMPURITIES IN HIGH PURITY ZrCl4 MATERIAL AND AFTER SEPARATION OF THE MATRIX Zr USING SOLVENT EXTRACTION USING 2-ETHYL HEXYL PHOSPHONIC ACID MONO 2-ETHYL HEXYL ESTER (PC88A) BY ICP-MS.

Nhuong¹,

Lan²,

Son³

et al. 2017

IJAR

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ICP-MS using matching matrix and internal standard In is believed direct detemination some impurities such as Al, Si, Ti, V, Cr, Fe, Ni, Zn, Nb, Mo, Sn, Hf, Ta and W in high purity ZrCl 4 . The study on capability extraction of Zr(IV) by di-2-ethyl hexyl phosphonic acid mono 2-ethyl hexyl ester (PC88A) were examined by infrared spectrum (IR) of ZrO(NO 3 ) 2 , PC88A-kerosene and Zr-PC88A-kerosene. Impurities in ZrCl 4 were also determinated when using internal standard In after separation of them from the matrix Zr by extracting in 50% of dissolved (PC88A) in kerosene. Investigation of separation of so many impurities from the matrix Zr showed that with using 50% PC88A/kerosene solvent, after one cycle extraction using 3M HNO 3 and 1-2 cycles stripping Zr and scrubbing impurities by 4M HNO 3 can recovery for 95-100% of almost investigated impurity elements and stripping about 22-28% of Zr(IV). Our results indicated that with the mentioned amount of Zr, effect of the matrix Zr on the determination of almost elements by ICP-MS can be negligible. Levels of impurities were relative standard deviations (RSD) less than 8.3% and recoveries (Rev) of 95.0-104.5%, so detemination of impurities was high reliability and accuracy.

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“…In an analysis of tantalum materials reported previously, graphite furnace atomic absorption spectrometry (GFAAS), 3,4 inductively coupled plasma atomic emission spectrometry (ICP-AES), [5][6][7][8][9] and fluorescence spectrometry 6 were used with or without any sample pretreatment by cation/anion exchange or solvent extraction.…”

mentioning

confidence: 99%

Determination of Ultratrace Impurities in High Purity Tantalum Materials by On-line Anion Exchange Matrix Separation and Inductively Coupled Plasma Mass Spectrometry

Kozono

Takashi

2000

ANAL. SCI.

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Determination of trace impurities in tantalum by inductively coupled plasma mass spectrometry after removal of the matrix by liquid-liquid extraction

Cited by 26 publications

References 8 publications

Nano ZrO2 Synthesis by Extraction of Zr(IV) from ZrO(NO3)2 by PC88A, and Determination of Extraction Impurities by ICP-MS

Nano ZrO2 Synthesis by Extraction of Zr(IV) from ZrO(NO3)2 by PC88A, and Determination of Extraction Impurities by ICP-MS

INVESTIGATION OF DIRECT DETEMINATION OF MANY IMPURITIES IN HIGH PURITY ZrCl4 MATERIAL AND AFTER SEPARATION OF THE MATRIX Zr USING SOLVENT EXTRACTION USING 2-ETHYL HEXYL PHOSPHONIC ACID MONO 2-ETHYL HEXYL ESTER (PC88A) BY ICP-MS.

Determination of Ultratrace Impurities in High Purity Tantalum Materials by On-line Anion Exchange Matrix Separation and Inductively Coupled Plasma Mass Spectrometry

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