Strontium(II) Sensor Based on a Modified Calix[6]arene in PVC Matrix

Gupta, Vinod K.; Ludwig, Rainer; Agarwal, Saurabh

doi:10.2116/analsci.21.293

Cited by 28 publications

(11 citation statements)

References 17 publications

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“…The surprisingly high selectivity of the membrane electrode for strontium ions over other cations used most probably arises from the strong tendency of the carrier molecules for strontium ions. Table 3 compares the selectivity coefficients, detection limits, and dynamic linearity range of all Sr 2þ sensors (Shamsipur et al 1999;Jain et al 2004;Gupta, Ludwig, and Agarwal 2005). As is immediately evident, the described sensor is superior to the reported Sr 2þ sensors not only in terms of selectivity but also in terms of detection limit and linearity range.…”

Section: Sr 2+ Electrode Selectivitymentioning

confidence: 82%

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Construction of Strontium PVC-Membrane Sensor Based on Salicylaldehyde Thiosemicarbazone

Zamani

2008

Analytical Letters

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This work introduces a unique ionophore for the selective determination of Sr 2þ ions. The ionophore, salicylaldehyde thiosemicarbazone (ST), presented a high affinity toward the strontium cations. The demonstrated characteristics of the sensor included a linear dynamic range between 1.0 Â 10 À6 and 1.0 Â 10 À2 M with a near Nernstian slope of 29.4 AE 0.5 mV per decade, a detection limit of 4.8 Â 10 À7 M, and a very good selectivity for Sr 2þ over other cations in a wide pH range (2.8-10.4). The sensor possessed the advantages of short conditioning time, fast response time (<10 s), and, especially, good selectivity toward the transition and heavy metal ions as well as some mono, di, and trivalent cations. Concerning the electrode lifetime, no considerable potential divergence was noticed for at least 10 weeks. The developed sensor was successfully used as an indicator electrode in the Sr 2þ titration with EDTA from binary mixtures, and the Sr 2þ monitoring in mixtures of three and five different ions.

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Section: Sr 2+ Electrode Selectivitymentioning

confidence: 82%

“…In spite of providing an accurate determination, these methods are not appropriate because they demand high cost and sample pretreatment. There have been some reports of ion-selective strontium electrodes in the literature (Shamsipur et al 1999;Jain et al 2004;Gupta, Ludwig, and Agarwal 2005;Zamani et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Construction of Strontium PVC-Membrane Sensor Based on Salicylaldehyde Thiosemicarbazone

Zamani

2008

Analytical Letters

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“…Zhang and coworkers came up with the new methodology for the partitioning of Sr 2+ from nuclear waste using two macroporous silica‐based polymeric composites. Calixarenes are also widely tested by many researchers as a possible extractant for Sr 2+ .…”

Section: Introductionmentioning

confidence: 99%

Selective separation of strontium by multitopic ion‐pair receptor: A DFT exploration

Sadhu

Sundararajan

Pillai

et al. 2017

Int J of Quantum Chemistry

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Selective extraction of a radionuclide in the presence of other interfering ions is one of the vital steps in the back-end-of-the-nuclear fuel cycle. The presence of interfering cations (such as Ca 21 ) in the radioactive waste and involvement of multiple separation steps are known to be bottlenecks in the efficient Sr 21 extraction. Here, using free energy corrected density functional theory, we have proposed a two-step Sr 21 extraction methodology in nitrate media in the presence of interfering Ca 21 ion using a multitopic ion-pair receptor, which was earlier reported to be strongly selective for K 1 (Kim et al. J. Am. Chem. Soc. 2012, 134, 1782-1792. To depict the correct free energy trend in the proposed extraction processes, the most probable binding mode of the metal (Sr 21 , Ca 21 , and K 1 ) nitrates in the host are identified. In excellent agreement with the previously reported experiment, Crown/Pyrrole (C/P) binding is noted to be the most preferable mode for KNO 3 , where K 1 and NO 2 3 occupied the Crown (C) and Pyrrole (P) site, respectively. However, the divalent metal ions (Ca 21 and Sr 21 ) are noted to marginally prefer Crown/Crown-Pyrrole (C/ CP) mode, in which metal reside at the C site while two nitrates occupy the P site and also simultaneously bind at the outer sphere of C site to coordinate with the metal via monodentate motif.Based on the free energy of extraction, we predict that the selective separation of chemically alike Ca 21 /Sr 21 pair is indeed achievable using this receptor. We propose that once [Sr(NO 3 ) 2 ] is extracted in organic media, the receptor's high affinity toward K 1 in nitrate media can be used to back strip Sr 21 to the aqueous phase. K E Y W O R D S density functional theory, multitopic ion-pair receptor, selective separation | I N TR ODU C TI ONSelective separation of fission products like radiostrontium ( 89/90 Sr) in the presence of other interfering divalent ions such as, calcium (Ca) is a challenging and an important task which is central to nuclear waste management program. [1][2][3] The primary aim behind extraction of 90 Sr from the nuclear waste is to reduce the volume of high level liquid waste (HLLW) that can further minimize the undesirable decay heat production in the waste. Similarly, waste generated due to the accidental release of 90 Sr into the atmosphere also requires significant chemical treatment to reduce the radionuclide associated long term hazards and restricts its migration in the environment.Considerable research is devoted to find viable separation techniques for the extraction and recovery of Sr 21 . [2][3][4][5][6] The major difficulty in such separation processes is the presence of interfering cations such as, Ca 21 . In addition to this, strong hydration energy barrier of Sr 21 (-330 kcal mol 21 ) also acts as a bottleneck to extract it into the organic phase and thus signifies the need of a proper extractant with available diluents. Several chemical treatments such as nitrate precipitation and ion exchange methods for Sr 21 recovery ...

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“…A survey on the literature proves that there exist only a limited number of reports on selective determination of Sm 3+ ions in the presence of other rare earth elements by electrochemical method [3][4][5][6][7]. Numerous reports on the selective and sensitive PVC-membrane ISEs have recently been published [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] which made us believe another ion selective sensor could be introduced for the potentiometric determination of Sm 3+ ion based on N,N′,N″-tris(4-pyridyl)trimesic amide (TPTA) (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

Fabrication of a PVC membrane samarium(III) sensor based on N,N′,N″-tris(4-pyridyl)trimesic amide as a selectophore

Zamani

Naghavi-Reyabbi

Faridbod

et al. 2013

Materials Science and Engineering: C

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Strontium(II) Sensor Based on a Modified Calix[6]arene in PVC Matrix

Cited by 28 publications

References 17 publications

Construction of Strontium PVC-Membrane Sensor Based on Salicylaldehyde Thiosemicarbazone

Construction of Strontium PVC-Membrane Sensor Based on Salicylaldehyde Thiosemicarbazone

Selective separation of strontium by multitopic ion‐pair receptor: A DFT exploration

Fabrication of a PVC membrane samarium(III) sensor based on N,N′,N″-tris(4-pyridyl)trimesic amide as a selectophore

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