On-line ion-exchange separation and determination of niobium, tantalum, tungsten, zirconium and hafnium in high-purity iron by flow injection inductively coupled plasma mass spectrometry

Abstract. The multiple sorption of sodium tungstate resulting from the autoclave-soda digestion of a tungsten-bearing concentrate was studied using anion-exchange resin AV-17-8. The choice of ion exchange resin was carried out under static conditions using highly basic anionites. The sorption and desorption plots for tungstate and carbonate ions were demonstrated under dynamic conditions. The total dynamic capacity of the resin was estimated for each species of the ions in three sorption cycles. The applicability of the AV-17-8 resin as a sorbent in the autoclave-soda process flowsheet was determined.

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“…Trace quantities of niobium, tantalum, tungsten, zirconium, and hafnium can be separated on anionite Dowex 1X8-100 [23].…”

Section: Introductionmentioning

confidence: 99%

Periodic Sorption of Tungstate Ions on Anionite AV-17-8

et al. 2017

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“…Reduction to environmental load was demanded in the field of steel analysis, and those studies were performed in the meeting for the study of the development of environment-friendly steel analysis techniques 10) in ISIJ. Under such circumstances, ion-exchange separation, [11][12][13][14] which meets these conditions, has been studied extensively. However, considerable time is necessary because this method uses no absorption filtration with a large quantity of ion-exchange resin when a sample solution is passed to a column.…”

Section: Introductionmentioning

confidence: 99%

Elemental Analysis of Iron and Steel by Solid-phase Extraction/ICP–MS Using an Anion Exchange Extraction Disk

Hasegawa

2014

ISIJ Int.

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Various investigations were conducted to establish quantification of microelements in iron and steel using ICP-MS with solid-phase extractive separation capable of separating the matrix simply and rapidly as a pretreatment. A "zero-emission type analysis" free from EDTA as a masking agent and buffering agents used for pH adjustment was sought. To do so, an anion-exchange type solid-phase extraction disk was used as the solid-phase extraction agent, along with "skill-free analysis" requiring no cumbersome manipulations, and "quick analysis" for assessment in an extremely short period of time. Results show a target element in a solid-phase disk, whereas the sample solution at separation was maintained at higher than pH 1.8. The pH adjustment was conducted by dilution of the sample solution with about 400 cm 3 of water. The target element held in the solid-phase disk was eluted with 10 cm 3 of 3 kmol/m 3 nitric acid.

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“…Many separation techniques, including sorption, [5][6][7][8][9][10][11][12] liquidliquid extraction, [13][14][15][16][17][18] coprecipitation, [18][19][20][21][22] electrolysis, 14,23,24) and volatilization, 25,26) have been employed to determine impurities at ultratrace levels in iron and steels. However, these techniques are often tedious and time-consuming and they sometimes require volatile, flammable, and ill-smelling organic solvents or corrosive and hazardous acids.…”

Section: Introductionmentioning

confidence: 99%

Matrix-precipitation for the Determination of Trace Impurities in High-purity Iron

Matsumiya¹,

Kuromiya²,

Hiraide³

2013

ISIJ Int.

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The present paper describes a facile method for the determination of trace impurities in iron metals. This method is based on the selective removal of the matrix element as hydroxide precipitate followed by the determination of desired trace elements left in the solution. To an iron sample solution were added ethylene glycol bis(2-aminoethyl ether)-N,N,N',N'-tetraacetic acid (EGTA) and diethylenetriamine. The iron(III) matrix was almost completely (>99%) precipitated at pH 9.5, while trace elements [Mn(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II), and Pb(II)] were left in the solution due to the complexation with EGTA and diethylenetriamine. The sufficient removal of the matrix element and negligible loss of trace elements allowed the sensitive determination at ng g -1 levels by inductively coupled plasma-mass spectrometry.KEY WORDS: matrix precipitation; iron(III) hydroxide; trace metals; high-purity iron; inductively coupled plasma-mass spectrometry.

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On-line ion-exchange separation and determination of niobium, tantalum, tungsten, zirconium and hafnium in high-purity iron by flow injection inductively coupled plasma mass spectrometry

Cited by 42 publications

References 13 publications

Periodic Sorption of Tungstate Ions on Anionite AV-17-8

Periodic Sorption of Tungstate Ions on Anionite AV-17-8

Elemental Analysis of Iron and Steel by Solid-phase Extraction/ICP–MS Using an Anion Exchange Extraction Disk

Matrix-precipitation for the Determination of Trace Impurities in High-purity Iron

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