Method of low tantalum amounts determination in niobium and its compounds by ICP-OES technique

Smolik, Marek; Turkowska, M.

doi:10.1016/j.talanta.2013.03.065

Cited by 5 publications

(6 citation statements)

References 4 publications

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“…The determination of Ta aer separation from the Nb matrix by extraction with MIBK and re-extraction with ammonium oxalate was compared with the results obtained by the direct determination of Ta in the presence of Nb by hydrolysing various Nb compounds to niobic acid followed by complexation of the latter in an oxalic acid medium containing a specied amount of dihydrogen dioxide. 10 The relative difference in the determination of Ta in commercial Nb preparations using these two independent methods did not exceed 14%, indicating a high agreement between these two methods (Table 13).…”

Section: Comparison Of Determination Of Ta(v) In Various Nb Preparationsmentioning

confidence: 86%

“…[3][4][5][6][7][8][9] Although it is not as sensitive as the less available and more expensive ICP-MS method, it can be used to determine Ta in difficult to excite Nb materials at levels of 10 À2 to 10 À3 % Ta. 10 One of the reasons for not taking full advantage of the ability of these methods to determine low concentrations of Ta is the lack of availability of pure reference materials (Nb compounds containing <5 Â 10 À4 % Ta). Hence the determination of low Ta concentrations should be preceded by the separation of Ta from the Nb matrix.…”

Section: Introductionmentioning

confidence: 99%

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Pre-concentration of Ta(V) by solvent extraction before determination of trace amounts of Ta in Nb and Nb compounds

Turkowska

Smolik

2016

Anal. Methods

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Section: Comparison Of Determination Of Ta(v) In Various Nb Preparationsmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Pre-concentration of Ta(V) by solvent extraction before determination of trace amounts of Ta in Nb and Nb compounds

Turkowska

Smolik

2016

Anal. Methods

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“…Based on our previous studies of tantalum determination in the niobium matrix [41,42], depending on the tantalum content in niobium, Ta determination was performed using a Varian 810-MS inductively coupled plasma mass spectrometer (ICP-MS) (Varian, Palo Alto, CA, USA) (<3 ppm Ta in Nb) or a iCAP 7400+ MFC Duo inductively coupled plasma atomic emission spectrometer (ICP-AES) (Thermo) (>3 ppm Ta in Nb) equipped with a Duo EMT Torch Kit, cyclonic spray chamber, and sea spray nebulizer. The standards of tantalum with proper niobium matrix concentration were used.…”

Section: Apparatusmentioning

confidence: 99%

“…These studies are intended to show the possibility of obtaining very pure niobium matrices, namely niobium compounds with a low Ta content, which are crucial for preparing matrix reference solutions or certified reference materials (CRMs). This should decrease the limit of quantification (LOQ) of tantalum in niobium using a direct instrumental method, namely ICP-OES, for the quantification level of LOQ ≤ 10 −4 % Ta per Nb, which is currently impossible due to the lack of availability of these products on the market [41,42].…”

Section: Introductionmentioning

confidence: 99%

Solvent-Impregnated Sorbents for Tantalum from Niobium Separation Using a Fixed-Bed Column

et al. 2022

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Reactor-grade niobium steel is used as a construction material for nuclear reactors. In this case, the presence of tantalum, which is characterized by a 20 times higher active cross section for capturing thermal neutrons than the cross section of niobium (181Ta: 21.3 barn), cannot exceed 100 ppm. Analytical methods for quality and new separation method development control need very pure niobium matrices—niobium compounds with a low tantalum content, which are crucial for preparing matrix reference solutions or certified reference materials (CRMs). Therefore, in this paper, a new, efficient method for separating trace amounts of Ta(V) from Nb(V) using extraction chromatography with the use of sorbents impregnated with methyl isobutyl ketone MIBK solvent is proposed. Various types of MIBK-impregnated sorbents were used (AG® 1-X8 Anion Exchange Resin, AMBERLITE™ IRC120 Na Ion Exchange Resin, SERVACEL® Cellulose Anion Exchangers DEAE 52, active carbons of various grain size, carbonized blackcurrant pomace, carbonized chokeberry pomace, bentonite, and polyurethane foam in lumps). The highest tantalum removal efficiency was determined using active coal-based materials (>97%). The separation effectivity of tantalum from niobium was also determined in dynamic studies using a fixed-bed column with MIBK-impregnated active carbon. Solutions of various Nb:Ta weight ratios (1:1, 100:1, 1000:1) were used. The most impressive result was obtaining 70 mL of high purity niobium solution of tantalum content 0.027 ppm (in relation to Nb) with 88.4% yield of niobium from a solution of Nb:Ta, weight ratio 1000:1 (purge factor equaled 35,000). It proves the presented system to be applicable for preparation of pure niobium compounds with very low contents of tantalum.

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“…2a,b,d In addition to clinical applications of tantalum and tantalum oxide as NP contrast agents, these materials are already in use in regenerative medicine, orthopedics and dentistry. 4 Although the determination of Ta by inductively coupled plasma optical emission spectrometry (ICP-OES) or ICP-mass spectrometry has been reported for various tantalum compounds and minerals, 5 niobium compounds, 6 tungsten carbide and cemented carbide, 7 lead and lead-based alloys, 8 and gold, 9 details regarding the quantitation of Ta in biological matrices by ICP-OES are limited. 3,10 Thus, precise and accurate methods for the determination of Ta content in tissues and bodily uids are needed to advance our understanding of the fate of Ta in biological systems.…”

Section: Introductionmentioning

confidence: 99%

Determination of tantalum from tantalum oxide nanoparticle X-ray/CT contrast agents in rat tissues and bodily fluids by ICP-OES

Crowder

Bates

Roberts

et al. 2016

J. Anal. At. Spectrom.

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Accurate and precise means for quantifying Ta in tissues, bodily fluids, and bone is critical in understanding anticipated safety-profiles for tantalum oxide (TaO) nanoparticle-based X-ray/CT diagnostic imaging agents and has prompted the development of three digestion methods which are the focus of this work. Spike recovery studies were employed to evaluate bias, precision, and sample matrix effects in the quantification of Ta in (1) liver, blood and femur by microwave-assisted digestion, (2) urine by open-beaker digestion, and (3) carcass, liver and feces by dry-ash digestion. All analyses were performed with inductively coupled plasma optical emission spectrometry (ICP-OES). Spike recoveries were 98.5-102.3% for all biological matrices except femur (91.6%); however, a modified version of the original microwave digestion procedure improved the recovery of Ta in femur to 103.8%. Precision of spike recovery reported as one standard deviation ranged from 0.1 to 3.8% for within-run and from 0.5 to 3.3% for overall recovery depending on the tissue type and digestion method. Limit of detection (LOD) was 0.006 to 6 mg Ta per g and limit of quantification (LOQ) was 0.02 to 20 mg Ta per g depending on the method. The presented methods were applied to the determination of Ta in liver, kidney, spleen and carcass from an in vivo TaO nanoparticle retention study, and the results for percent injected dose (% ID) of Ta retained are given. † Electronic supplementary information (ESI) available: Sample digestion reagents, instrument calibration standards, tantalum oxide nanoparticle contrast agent digestion procedures and results, within-run recovery and precision for each biological material per digestion method, and in vivo retention case study results. See

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Method of low tantalum amounts determination in niobium and its compounds by ICP-OES technique

Cited by 5 publications

References 4 publications

Pre-concentration of Ta(V) by solvent extraction before determination of trace amounts of Ta in Nb and Nb compounds

Pre-concentration of Ta(V) by solvent extraction before determination of trace amounts of Ta in Nb and Nb compounds

Solvent-Impregnated Sorbents for Tantalum from Niobium Separation Using a Fixed-Bed Column

Determination of tantalum from tantalum oxide nanoparticle X-ray/CT contrast agents in rat tissues and bodily fluids by ICP-OES

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