Flow injection analysis of chloride in tap and sewage water using ion-selective electrode detection

Ilcheva, Liliana; Cammann, Karl

doi:10.1007/bf00490916

Cited by 46 publications

(20 citation statements)

References 7 publications

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“…This may be attributed to the different methods applied in determining the selectivity coefficient values in both batch and FI techniques, i.e. the matched potential and separate solution methods respectively [38][39][40]. This is interpreted by difference in times of interaction of interferents with the sensor in comparison to the main sensed ion; also the interference process is highly dependent on the rate of diffusion and the exchange reaction of the interfering ion [41].…”

Section: Selectivitymentioning

confidence: 94%

Using PVC ion-selective electrodes for the potentiometric flow injection analysis of distigmine in its pharmaceutical formulation and biological fluids

Issa

Khorshid

2011

Journal of Advanced Research

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The construction and electrochemical response characteristics of poly(vinylchloride) (PVC) membrane selective electrodes for the determination of distigmine (Ds) are described. The sensing membrane comprised an ion-pair based on distigmine phosphomolybdate (Ds-PM), distigmine phosphotungstate (Ds-PT), distigmine silicomolybdate (Ds-SM), distigmine silicotungstate (Ds-ST), distigmine tetraphenylborate (Ds-TPB), and distigmine reineckate (Ds-Rein) in a plasticized PVC matrix with dioctylphthalate (DOP). The influence of membrane composition on the electrodes' response was studied. The electrodes showed a fast, stable and Nernstian response over a wide distigmine concentration range 5.0 · 10 À7 -1 · 10 À2 mol L À1 with a slope of $30.5 ± 1.0 mV dec À1 . The response is independent of the pH of test solution within the range 3.8-10.5. The life span of the electrodes extends to at least 2 months without any considerable divergence in potential and has a fast response time of <15 s. The electrodes showed good selectivity towards distigmine with respect to large numbers of ions in batch and FIA systems. The electrodes have been applied to the determination of distigmine in pure solution, pharmaceutical compound and human urine. The dissolution profile for Ubretid tablets (5 mg/tablet) was studied.

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Section: Selectivitymentioning

confidence: 94%

Using PVC ion-selective electrodes for the potentiometric flow injection analysis of distigmine in its pharmaceutical formulation and biological fluids

Issa

Khorshid

2011

Journal of Advanced Research

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“…Improved selectivity differs a bit from that inherent to the flow-injection mode of operation and is due only to the difference in time response of the primary and interfering ion. Improved selectivity is commonly observed with all ISEs [39]. The dominating contribution of the optimized membrane composition, manifested in improved membrane dynamic and surface properties, over that of the FI manifold and the beneficial sensor/ FI manifold interaction for achieving improved selectivity is emphasized.…”

Section: Selectivitymentioning

confidence: 97%

Thin cathodically electroplated chalcogenide-based ion-selective membranes for flow-injection application

Neshkova

2000

Lab. Robotics Autom.

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“…[30][31][32][33] This is interpreted by the difference in the time of the interaction of the interferents with the membrane surface. This difference increases with an increase in the interaction of the interferent with the membrane compared with the main sensed ion; also, the interference process is highly dependent on the rate of diffusion and the exchange reaction of the interfering ion.…”

Section: Selectivitymentioning

confidence: 99%

New Conventional Coated-Wire Ion-Selective Electrodes for Flow-Injection Potentiometric Determination of Chlordiazepoxide

et al. 2005

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New chlordiazepoxide hydrochloride (Ch-Cl) ion-selective electrodes (conventional type) based on ion associates, chlordiazepoxidium-phosphomolybdate (I) and chlordiazepoxidium-phosphotungstate (II), were prepared. The electrodes exhibited mean slopes of calibration graphs of 59.4 mV and 60.8 mV per decade of (Ch-Cl) concentration at 25˚C for electrodes (I) and (II), respectively. Both electrodes could be used within the concentration range 3.16 × 10 -6 -1 × 10 -2 M (Ch-Cl) within the pH range 2.0 -4.5. The standard electrode potentials were determined at different temperatures and used to calculate the isothermal coefficients of the electrodes, which were 0.00139 and 0.00093 V ˚C -1 for electrodes (I) and (II), respectively. The electrodes showed a very good selectivity for Ch-Cl with respect to the number of inorganic cations, amino acids and sugars. The electrodes were applied to the potentiometric determination of the chlordiazepoxide ion and its pharmaceutical preparation under batch and flow injection conditions. Also, chlordiazepoxide was determined by conductimetric titrations. Graphite, copper and silver coated wires were prepared and characterized as sensors for the drug under investigation.

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Flow injection analysis of chloride in tap and sewage water using ion-selective electrode detection

Cited by 46 publications

References 7 publications

Using PVC ion-selective electrodes for the potentiometric flow injection analysis of distigmine in its pharmaceutical formulation and biological fluids

Using PVC ion-selective electrodes for the potentiometric flow injection analysis of distigmine in its pharmaceutical formulation and biological fluids

Thin cathodically electroplated chalcogenide-based ion-selective membranes for flow-injection application

New Conventional Coated-Wire Ion-Selective Electrodes for Flow-Injection Potentiometric Determination of Chlordiazepoxide

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