Surfactant modified zeolite carbon paste electrode (SMZ-CPE) as a nitrate selective electrode

Nezamzadeh‐Ejhieh, Alireza; Nematollahi, Zohreh

doi:10.1016/j.electacta.2011.07.013

Cited by 68 publications

(19 citation statements)

References 51 publications

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“…Consequently, the obtained SMZ does not respond appropriately to CrO 4 2− . ese observations are in accordance with our previous works [18][19][20][21] and also with results for antimonate sorption [32]. Wingenfelder et al found when the external CEC was almost twofold, the zeolite absorbed >98% of the initial HDTMA in solution.…”

Section: Eoretical and Membrane Composition Investigationssupporting

confidence: 93%

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Modification of Nanoclinoptilolite Zeolite with Hexadecyltrimethylammonium Surfactant as an Active Ingredient of Chromate‐Selective Membrane Electrode

Nezamzadeh‐Ejhieh

Raja

2012

Journal of Chemistry

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A novel chromate selective PVC membrane electrode was constructed using a hexadecyltrimethylammonium-surfactant modi�ed zeolite (SMZ). Nano particles of an Iranian clinoptilolite zeolite were prepared by a ball-mill mechanical method and characterized by FT-IR, SEM and XRD. Best performance was exhibited at the membrane composition of SMZ : PVC : dioctyl phthalate (DOP) in the ratio of 4 : 32 : 64. is membrane worked well over a wide concentration range from 5 × 10 −6 to 1.0 × 10 −2 mol L −1 of CrO 4 2− with a Nernstian slope of −29.38 ± 0.29 mv per decade of CrO 4 2− concentration with detection limit of 2 × 10 −6 mol L −1 in a wide pH range of 6.8-10.7. e response time of the sensor is 5-10 s over a period of 2 months with good reproducibility. e selectivity coefficients of the proposed electrode towards various interfering ions were determined by FIM and SSM methods. e sensor was successfully used as indicator electrode in the potentiometric titration of CrO 4 2− against Pb(II) and determination of chromium in an electroplating wastewater sample.

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Section: Eoretical and Membrane Composition Investigationssupporting

confidence: 93%

“…Hence, we believe that the support on different SMZs has a major role in their adsorption behavior. Regarding different behaviors of HDTMA on different supports, we have constructed different selective electrodes based on SMZ modi�er towards potentiometric determination of anions [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Modification of Nanoclinoptilolite Zeolite with Hexadecyltrimethylammonium Surfactant as an Active Ingredient of Chromate‐Selective Membrane Electrode

Nezamzadeh‐Ejhieh

Raja

2012

Journal of Chemistry

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“…Our results are in accordance with the literature. For example, similar results were observed in our previous works in potentiometric determination of some anions by modified membrane and also carbon paste electrodes with different SMZs [57][58][59]. It has also been found when the HDTMA concentration was more than twice the concentration of the external CEC (or its ECEC), the zeolite absorbed 84% of the initial HDTMA concentration, while it adsorbed about 94% of the initial concentration when the HDTMA concentration was twofold that of the ECEC [60].…”

Section: Samplessupporting

confidence: 81%

Effect of a nano-sized natural clinoptilolite modified by the hexadecyltrimethyl ammonium surfactant on cephalexin drug delivery

Nezamzadeh‐Ejhieh

Tavakoli-Ghinani

2013

Comptes Rendus. Chimie

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“…However, development of a simple, alternative method based on ion‐selective electrodes (ISEs) is worth investigation. Ion‐selective sensors have replaced many well‐established analytical methods because they offer high precision, fast response, low cost of analysis, good selectivity and high sensitivity . Electroactive species of ISEs (e. g., ion pair, ion‐exchanger, neutral carrier, or charged carriers…etc.)…”

Section: Introductionmentioning

confidence: 99%

Potentiometric Determination of Ciprofloxacin in Physiological Fluids Using Carbon Paste and Nano‐Composite Carbon Paste Electrodes

2017

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Nano‐composite carbon paste and simple carbon paste based potentiometric sensors were constructed and used for determination of ciprofloxacin at different pH values. Sensors were formulated utilizing graphite, suitable plasticizer, cirprofloxacinium‐phosphotungstate, as well as a highly lipophilic cation‐exchanger, sodium tetrakis(trifluoromethyl)phenyl borate. Effect of the incorporation of multi‐walled carbon nanotubes (MWCNTs) on the response characteristics of the prepared sensors was investigated. Results obtained were compared to that of a PVC‐sensor contains only the cation‐exchanger. In addition, the effect of solutions pH on the response characteristics was also studied; at pH 4.1, the slopes of bare carbon paste and MWCNTs‐based sensors were 55.7 and 66.6 mV/conc.decade in a concentration range of 10−2‐10−5 M with detection limits of 1.0x10−5 and 7.9x10−6 M, respectively. Although both sensors exhibited super‐Nernstian slopes at pH 2.0, the selectivity was improved compared to that measured at pH 4.1. Optimized sensors were successfully applied for the determination of ciprofloxacin in its pure form, pharmaceutical preparations, as well as spiked urine and serum samples, with high recovery.

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Surfactant modified zeolite carbon paste electrode (SMZ-CPE) as a nitrate selective electrode

Cited by 68 publications

References 51 publications

Modification of Nanoclinoptilolite Zeolite with Hexadecyltrimethylammonium Surfactant as an Active Ingredient of Chromate‐Selective Membrane Electrode

Modification of Nanoclinoptilolite Zeolite with Hexadecyltrimethylammonium Surfactant as an Active Ingredient of Chromate‐Selective Membrane Electrode

Effect of a nano-sized natural clinoptilolite modified by the hexadecyltrimethyl ammonium surfactant on cephalexin drug delivery

Potentiometric Determination of Ciprofloxacin in Physiological Fluids Using Carbon Paste and Nano‐Composite Carbon Paste Electrodes

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