Polymeric plasticizer extends the lifetime of PVC-membrane ion-selective electrodes

Zahran, Elsayed M.; New, Andrea M.; Gavalas, Vasilis G.; Bachas, Leonidas G.

doi:10.1039/c3an01963b

Cited by 57 publications

(36 citation statements)

References 42 publications

(49 reference statements)

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“…7,21 Since tripodal squaramide ionophores had poor solubility in DOS (ε = 3.9), DBP (ε = 6.4) and DMP (ε = 8.5) with low dielectric constants, the more polar plasticizers NPOE (ε = 24) and FPNPE (ε = 50) were chosen. 7,21 Since tripodal squaramide ionophores had poor solubility in DOS (ε = 3.9), DBP (ε = 6.4) and DMP (ε = 8.5) with low dielectric constants, the more polar plasticizers NPOE (ε = 24) and FPNPE (ε = 50) were chosen.…”

Section: Optimization Of Electrode Performancementioning

confidence: 99%

Squaramide-based tripodal ionophores for potentiometric sulfate-selective sensors with high selectivity

Liu

Qin

Jiang

2015

Analyst

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A class of squaramide-based tripodal molecules was employed as new ionophores for highly sensitive and selective sulfate-selective sensors. Compared with the reported tripodal ionophore with urea, squaramide groups as superior hydrogen bonding donor were introduced into the tripodal structure to obtain new ionophores leading to better electrode performance. Three derivatives with unsubstituted (I), p-carbon trifluoride (II), and p-nitro (III) phenyl groups were attached to squaramide groups for the optimization of ionophore based sensors. Electron withdrawing p-nitrophenyl groups gave a greater enhancement of the hydrogen bond donor ability of squaramide so that Ionophore III was chosen as the best candidate for sulfate ion recognition. Such a membrane with 30 mol% TDMACl exhibited a Nernstian slope of -30.2 mV per decade to sulfate ions with a linear range from 1 μM to 100 mM in potentiometric measurement. The selectivity coefficients of the proposed sensor over H2PO4(-), Cl(-), Br(-), NO3(-), SCN(-), I(-) and ClO4(-) were -4.3, -3.4, -2.5, -0.6, +3.1, +3.4 and +5.9, respectively, which were much better than the existing sulfate-selective sensors. The new sensors with high selectivity were successfully applied for the quantification of sulfate in cell lysates and drinking water with good recoveries.

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Section: Optimization Of Electrode Performancementioning

confidence: 99%

Squaramide-based tripodal ionophores for potentiometric sulfate-selective sensors with high selectivity

Liu

Qin

Jiang

2015

Analyst

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“…Peaks were labeled in the spectra automatically via OMNIC soware (Thermo Electron Corporation, USA). 1 H Nuclear magnetic resonance (NMR) and 13 C NMR spectra of the products synthesized were performed on an AV-300 NMR spectrometer (Bruker Instrument Crop., Germany) at a frequency of 400 MHz. The process was carried out using CDCl 3 as solvent and tetramethylsilane (TMS) as an internal standard.…”

Section: Preparation Of Self-plasticizing Pvc Lmsmentioning

confidence: 99%

Internally plasticized PVC materials via covalent attachment of aminated tung oil methyl ester

Jia

Yang

et al. 2017

RSC Adv.

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We developed an internal plasticizer of aminated tung oil methyl ester for the production of non-migration, phthalate-free flexible and internally plasticized poly(vinyl chloride) (PVC) materials. The chemical structure of the synthesized aminated tung oil methyl ester and the internally plasticized PVC materials were characterized. The obtained internally plasticized PVC materials presented a lower glass transition temperature (T g ) and were more flexible than pure PVC. The thermal stability of internally plasticized PVC materials was less thermally stable compared to those of pure PVC due to the active secondary amine groups of aminated tung oil methyl ester. However, the modified PVC materials presented no migration for self-plasticizing PVC films but 15.7% weight loss for 50 wt% of the PVC/Dioctyl phthalate (DOP) system. It is expected that the PVC materials can be widely used in areas with high migration resistance requirements.

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“…High

K_{{normalj}^{normalz +}}^{pot}

and/or low

- \log {normalK}_{j^{z +}}^{pot}

values indicate high selectivity towards the primary ions over the interfering ions. Recent publications in the field of ion‐selective sensors reveal that the acceptable values of

- \log {normalK}_{j^{z +}}^{pot}

range from 0.1 to 7.5 in most cases . The values of

- \log {normalK}_{j^{z +}}^{pot}

for the studied sensor are shown in Table S3.…”

Section: Resultsmentioning

confidence: 99%

A Disposable Homemade Screen Printed Electrochemical Sensor for Vitamin B1 Determination in Multivitamin Ampoules: Potentiometric and Surface Morphology Studies

2017

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Thiamine chloride hydrochloride (TCH) is one of the B‐complex vitamins which resemble a very biologically important group of biomolecules. The first screen‐printed graphite ion‐selective sensor for the determination of TCH was prepared and characterized. The sensor is based on TCH‐tetraphenylborate as electrode material. A number of parameters such as the type of solvent mediator, weight percent of the ion‐exchanger, test solution temperature and possible interferences were extensively studied. Moreover, the surface morphology of the prepared sensor was studied using scanning electron microscopy. The sensor shows a Nernstian slope of 30.60±0.07 mV/decade, a low LOD of 5.08×10−6 mol/L and a wide applicability range of 5.96×10−6‐1.00×10−2 mol/L. The sensing graphite ink remains usable for at least one month. Fast potentiometric response was obtained within 5 s and remains stable for at least 60 s. The sensor was applied to the analysis of TCH in pure solutions and multivitamin ampoules from the Egyptian market using the standard addition method and high recovery values of 97–102 % were obtained. Low %RSD values (0.27‐1.30) indicate high precision of the proposed sensor. Our sensor provides the advantages of disposability, simple preparation procedures, sensitivity and easy storage and transportation.

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Polymeric plasticizer extends the lifetime of PVC-membrane ion-selective electrodes

Cited by 57 publications

References 42 publications

Squaramide-based tripodal ionophores for potentiometric sulfate-selective sensors with high selectivity

Squaramide-based tripodal ionophores for potentiometric sulfate-selective sensors with high selectivity

Internally plasticized PVC materials via covalent attachment of aminated tung oil methyl ester

A Disposable Homemade Screen Printed Electrochemical Sensor for Vitamin B1 Determination in Multivitamin Ampoules: Potentiometric and Surface Morphology Studies

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