Extraction Behavior of Mo(VI) and W(VI) as Homologs of Sg with<i>α</i>‐Benzoinoxime

Fan, Fuyou; Lei, Feng-yu; Zhang, L. N.; Bai, Jing; Lin, Mei; Li, X. F.; Ding, H.; Wu, X. L.; Nayak, Dalia; Qin, Zongyi

doi:10.1080/07366290902821305

Cited by 8 publications

(5 citation statements)

References 24 publications

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“…Zirconium is mostly interfered by molybdenum. This is the reason why some separation methods have been developed in order to extract or eliminate the molybdenum [24][25][26][27][28][29][30]. Some TIMS studies corrected mathematically the molybdenum interference by an interference correction equation [1,8,12,18].…”

Section: Introductionmentioning

confidence: 99%

Determination of zirconium isotope composition and concentration for nuclear sample analysis using Thermal Ionization Mass Spectrometry

Quemet

Maillard

Ruas

2015

International Journal of Mass Spectrometry

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A new Thermal Ionization Mass Spectrometer (TIMS) analytical procedure was developed to measure with high accuracy the zirconium isotope abundance and concentration without molybdenum correction in nuclear samples. A zirconium selective separation using UTEVA column was used before the TIMS measurement in order to remove all possible isobaric interferences (Mo, Y, Nb and Ru) in the solution. The separated solution was then deposited onto a filament previously outgassed for 4 hours to reduce the molybdenum traces in the filament. Then, the filament was introduced into the TIMS source and was maintained for 4 hours at a current of 5 A (ionization filament) and 1.2 A (evaporation filament) in order to eliminate all molybdenum trace present in the filament and in the sample. This methodology allowed the zirconium isotope abundance determination without using the molybdenum interference correction equation. The analytical results obtained with a natural solution after separation is in good accordance with the reference values: bias lower than 0.16 % for the 90 Zr, 91 Zr, 92 Zr and 94 Zr isotope abundance, and a bias of ~0.8 % for the minor isotope (96 Zr) were observed. This zirconium abundance determination methodology was used on three nuclear samples. Then, the calibration of a 91 Zr spike solution was performed by reverse isotope dilution using a SPEX standard zirconium solution. The zirconium concentration determination was then performed on the three nuclear samples by isotope dilution using the SPEX standard zirconium solution and the 91 Zr spike solution. The final uncertainties were estimated to be lower than 1 %.

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Section: Introductionmentioning

confidence: 99%

Determination of zirconium isotope composition and concentration for nuclear sample analysis using Thermal Ionization Mass Spectrometry

Quemet

Maillard

Ruas

2015

International Journal of Mass Spectrometry

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“…In the aqueous solution the predominance of molybdenum species depends, among other factors, on the metal concentration, the pH of solution and the ionic strength [23]. According to the literature [17,18,[24][25][26] and our additional experimental results [21], we conclude that the MO 2 2+ (M = Mo, W) species was extracted into the organic phase at the present experimen- tal condition. One can assume that at low HCl concentrations, the hydrolysis products MO 4 2− and MO 3 (OH) − are dominant [16,27,28] which leads to a decrease in the percentage extraction E. The decrease of the E values at higher HCl concentration can be interpreted as being due to the formation of anionic chloro-complexes of the type MO 2 Cl − 3 [27,28].…”

Section: Extraction Of Short-lived Isotopes Of Mo and W From Pure Hclmentioning

confidence: 67%

“…α-benzoinoxime is a special extracting agent for molybdenum, tungsten and vanadium [17][18][19][20] since it reacts with these metal elements to form stable chelate complexes which are soluble in organic solvents. According to our previous works about the extraction behavior of micro amounts of molybdenum and tungsten, the extracted species of Mo/W in the organic phase were found to be MoO 2 2+ /WO 2 2+ and each metal ion is most likely coordinated to two molecules of α-benzoinoxime in the organic phase [21].…”

Section: Introductionmentioning

confidence: 98%

Extraction behavior of short-lived isotopes of Mo/W using α-benzoinoxime: A model system for the study of seaborgium

Fan¹,

Lei

Zhang

et al. 2009

Radiochimica Acta

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Liquid-liquid extraction / α-benzoinoxime / Molybdenum / Tungsten / SeaborgiumSummary. The liquid-liquid extraction behavior of shortlived molybdenum and tungsten isotopes from HCl and HNO 3 as well as HF/HNO 3 acid media was studied using the α-benzoinoxime/chloroform system. The goal of the present experiments was to find an extraction system with a high selectivity for the group 6 elements in the periodic table which is suitable for the study the solution chemistry of seaborgium (Z = 106). It was found that Mo and W are both effectively extracted using α-benzoinoxime as an extractant and the maximum extraction yield is 100% and 94% for Mo and W, respectively. Ions of MO 2 2+ (M = Mo, W) exist in HCl between the concentration range of 0.1-3 M and can be extracted quantitatively into the organic phase. The decrease of extraction yields at lower or higher acid concentration is due to the formation of anionic species MO 4 2− or MO 2 Cl 3 − . The extraction behavior of Mo and W in HNO 3 solution is similar to that in HCl solution. In HNO 3 /HF mixed acid solutions, due to the formation of MO 2 F 3 − a decrease of extraction yield at higher HF concentration, similar to the case of HCl is observed. The extraction equilibrium is reached within 10-30 s, which means the extraction kinetics of α-benzoinoxime/chloroform extraction system is fast enough for the study of the isotope 265 Sg. The extraction behavior of molybdenum and tungsten shows a distinct difference in the range of 0.05 to 0.2 M HF with 1 M HNO 3 . This shows that differences in the complexation with fluoride ion exist in Mo and W. This study focuses on the investigation of the tendency of group 6 element for complexation with fluoride ion.

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“…1,5,6 Molybdenum(VI) forms complexes with various natural organic ligands, such as polyphenols and their functional derivatives, polyhydroxycarboxylic acids, aminopolycarboxylic acids, hydroxamic acids, amines (primary, secondary and tertiaty), 8-hydroxyquinoline and its derivatives, aldehyde hydrazones, oximes, β-diketones, fluorones, hydroxyazodyes, biomolecules (chitosan, chitin, D-glucosamine, L-alanine, L-phenylalanine). [7][8][9][10][11][12][13][14][15][16][17][18][19][20] Molybdenum(VI) gives colored chelates with aromatic compounds, containing two or more hydroxyl groups in ortho position relative to each other. The colored anionic chelates of molybdenum(VI) form ion-associated complexes Stojnova et al: Study on the Chelate Formation and ... with bulky organic cations, like methyltrioctylammonium, cetylpyridinium, cetyltrimethylammonium, tetraphenylammonium tetraphenylphosphonium.…”

Section: Introductionmentioning

confidence: 99%

Study on the Chelate Formation and the Ion-association of Anionic Chelate of Molybdenum(VI) with 3,5-Dinitrocatechol and Monotetrazolium Cation

Stojnova

Divarova

Racheva

et al. 2018

ACSi

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The equilibria of the chelate formation and ion-association in the liquid-liquid extraction system Mo(VI)-3,5-DNC-INT-H 2 O-CHCl 3 were studied by spectrophotometry. The optimum conditions for the chelate formation and extraction of the ion-associated complex formed between the anionic chelate of Mo(VI)-3,5-dinitrocatechol (3,5-DNC) and the cation of 2-(4-iodophenyl)-3-(4-nitrophenyl)-5-phenyl-2H-tetrazolium chloride (INT) were established. The validity of Beer's law was checked and some analytical characteristics were calculated. The effect of various co-existing ions and reagents on the process of complex formation was investigated. The molar ratio of the components in the ternary ion-associated complex Mo(VI)-3,5-DNC-INT was determined by independent methods. The association process in aqueous phase and the extraction equilibria were investigated and quantitatively characterized. The following key constants of the processes were calculated: association constant, distribution constant, extraction constant and recovery factor. Based on this, a reaction scheme, a general formula and a structure of the complex were suggested.

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Extraction Behavior of Mo(VI) and W(VI) as Homologs of Sg withα‐Benzoinoxime

Cited by 8 publications

References 24 publications

Determination of zirconium isotope composition and concentration for nuclear sample analysis using Thermal Ionization Mass Spectrometry

Determination of zirconium isotope composition and concentration for nuclear sample analysis using Thermal Ionization Mass Spectrometry

Extraction behavior of short-lived isotopes of Mo/W using α-benzoinoxime: A model system for the study of seaborgium

Study on the Chelate Formation and the Ion-association of Anionic Chelate of Molybdenum(VI) with 3,5-Dinitrocatechol and Monotetrazolium Cation

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