Potentiometric Membrane Electrode for Salicylate Based on an Organotin Complex with a Salicylal Schiff Base of Amino Acid

Xu, Lan; Yuan, Ruo; Fu, Ying‐Zi

doi:10.2116/analsci.21.287

Cited by 13 publications

(6 citation statements)

References 52 publications

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“…As can be seen, the electrode reaches the equilibrium response in a very short time. The response time is comparable to, or even shorter than those reported in literature, that were found to give linear response in the same or narrower working ranges 1, 2, 5, 20, 22, 26, 28, 33.…”

Section: Resultssupporting

confidence: 81%

“…This calibration curve also showed linearity over the concentration range of 1.0×10 −5 –1.0×10 −1 M with sensitivity of 58.9±0.4 mV/pSal. The detection limit, as determined from the intersection of the two extrapolated segments of first calibration plot was found as 4.3×10 −6 M. Consequently, the electrode prepared using calix[4]arene as ionophore has shown Nernstian response competitive with electrodes based on metal complexes in literature and has a good repeatability as can be seen from small error bars in calibration curves 1, 3, 23, 24, 26–31.…”

Section: Resultsmentioning

confidence: 74%

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Salicylate Ion‐Selective Electrode Based on a Calix[4]arene as Ionophore

et al. 2015

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A salicylate‐selective electrode based on calix[4]arene derivative was developed and its response characteristics were investigated. The optimum membrane composition was 1 % ionophore, 30 % PVC, 69 % DOS. The electrode exhibited a Nernstian slope of 58.8±0.5 mV/pSal in the range of 1.0×10−5–1.0×10−1 M with a detection limit of 4.3×10−6 M at pH 4.0, 20±1 °C. The potentiometric response of the electrode in the presence of different anions was investigated by the separate solution method. The lifetime was found at least 4 months, and its response time was 5–10 s. It was successfully used for the potentiometric determination of salicylate in pharmaceutical preparations.

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Section: Resultssupporting

confidence: 81%

Section: Resultsmentioning

confidence: 74%

Salicylate Ion‐Selective Electrode Based on a Calix[4]arene as Ionophore

et al. 2015

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“…This behavior is attributed to the strong interaction between Co(III) complex and sal − which may be raised from both direct interaction with the metal center and the intermolecular H‐bond between the uncoordinated C=O group and the ionizable groups in the ionophore rather than the lipophilicity of anions or simple electrostatic interaction with anions 54, 55. Table 2 also includes the selectivity values for some closely related sal − electrodes 12, 56–59. The results confirm the high selectivity response of the proposed sal − sensors.…”

Section: Resultsmentioning

confidence: 99%

Total Synthesis of the Spirocyclic Oxindole Alkaloids Corynoxine, Corynoxine B, Corynoxeine, and Rhynchophylline

et al. 2013

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Racemic total syntheses of four spirocyclic oxindole alkaloids are reported. The general starting material was an N‐2‐butenylated 2‐hydroxytryptamine, which underwent a base‐mediated Mannich spirocyclisation with a functionalised aldehyde to generate the C‐ring. The second key step was a Pd‐catalysed cyclisation of an α‐keto ester enolate (in the original aldehyde) onto an allylic carbonate (in the N‐substituent) to form the D‐ring. The stereoselectivities of the key steps were moderate, but the isomers were readily purified, so that the natural products could be conveniently prepared, three of them for the first time.

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“…Recently, some electrodes prepared by incorporating different metallic complexes into PVC polymeric membranes have displayed relatively high selectivity toward salicylate [15][16][17][18][19][20][21][22][23]. However, some of these sensing carriers are toxic organotin complexes [17][18][19][20], some are nonstable cobalt complexes [21] and some are difficult to be synthesized [23]. Moreover, the electrodes based on these complexes exhibited somewhat poor potential response characteristics, such as sub-or super-Nernstian slope, narrow linear range, high detection limit, slow response time and so on.…”

Section: Introductionmentioning

confidence: 99%

Application of metalloporphyrin grafted-graphene oxide for the construction of a novel salicylate-selective electrode

Poursaberi¹,

Hassanisadi²

2012

J. Porphyrins Phthalocyanines

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Due to the vast applications of salicylate ion, development of a simple and selective procedure for its determination is of practical interest. Herein, the unique properties of graphene oxide are combined with the anion selectivity of metalloporphyrins to construct a novel salicylate selective electrode. This electrode is prepared by incorporating Cu(II)–5-4 (aminophenyl)-10,15,20-triphenyl porphyrin grafted-grapheneoxide (CuTPP-GO) into the plasticized poly (vinyl chloride) membrane. Effects of plasticizer nature, Cu TPP-GO concentration and anionic and cationic additives on the potential response of the electrode are investigated. The electrode with the membrane composition of 25% PVC, 50% NPOE, 5% NaTPB and 20% Cu TPP-GO provided the best behavior. This sensor shows a Nernstian response (57.8 mV.decade-1) in the concentration range of 5.0 × 10-1–5.0 × 10-7M with detection limit of 8.0 × 10-8M. sensor response is stable in the pH range of 5–7 and shows a discriminating ability for salicylate compared to most common anions. The sensor was successfully used for determination of salicylate in an aspirin tablet.

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Potentiometric Membrane Electrode for Salicylate Based on an Organotin Complex with a Salicylal Schiff Base of Amino Acid

Cited by 13 publications

References 52 publications

Salicylate Ion‐Selective Electrode Based on a Calix[4]arene as Ionophore

Salicylate Ion‐Selective Electrode Based on a Calix[4]arene as Ionophore

Total Synthesis of the Spirocyclic Oxindole Alkaloids Corynoxine, Corynoxine B, Corynoxeine, and Rhynchophylline

Application of metalloporphyrin grafted-graphene oxide for the construction of a novel salicylate-selective electrode

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