نتایج جستجو برای: aliii selective electrode

تعداد نتایج: 259980  

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2002
Mir Fazlollah Mousavi Mojtaba Shamsipur Siavash Riahi Mohammad Safy Rahmanifar

A new, simple, sensitive, low cost and rapid potentiometric method for direct determination of ultra trace amounts of sodium dodecyl sulfate (SDS) with a new DS(-)-selective electrode is reported. The electrode was prepared by electropolymerization of aniline in acidified DS- ion on the surface of a Pt electrode. The cyclic voltammetry (CV) was used for electropolymerization of polyaniline (PA)...

2018
Xueliang Bao Yuxuan Zhou Yunlong Wang Jianjun Zhang Xiaoying Lü Zhigong Wang

It is still challenging to achieve a complex grasp or fine finger control by using surface functional electrical stimulation (FES), which usually requires a precise electrode configuration under laboratory or clinical settings. The goals of this study are as follows: 1) to study the possibility of selectively activating individual fingers; 2) to investigate whether the current activation thresh...

Journal: :iranian journal of pharmaceutical research 0
farhad ahmadi 1- drug delivery research center, faculty of pharmacy, kermanshah university of medical sciences, kermanshah, islamic republic of iran. 2-department of medicinal chemistry, faculty of pharmacy, kermanshah university of medical sciences, kermanshah, islamic republic of iran. nasim assadi department of medicinal chemistry, faculty of pharmacy, kermanshah university of medical sciences, kermanshah, islamic republic of iran.

a novel potentiometric ion-selective pvc membrane sensor for analysis of atorvastatin (at) in pharmaceutical preparations based on atorvastatin-(tetraphenyl borate), (at-(tpb)2) as sensing element, tetraphenyl borate as additive and tris-2-ethyl-hexyl phosphate (top) as plasticizer solvent was prepared. the electrode shows a good nernestian response over the concentration range of 0.09–5586 µg ...

2004
J. Fei Y. Sun S. Hu Z. Gao

A sensitive and selective amperometric procedure, based on a glassy carbon electrode (GCE) modified with a thin multi-wall carbon nanotube (MWNT) film, for the determination of ascorbic acid (AA) was developed. The modified electrode showed excellent electrocatalytic activity towards the oxidation of AA. The oxidation potential of AA shifted negatively by as much as 460 mV to –18 mV (vs. SCE) a...

Journal: :Electrochimica Acta 2022

Voltammetric ion-selective electrodes (ISEs) based on poly(3-octylthiophene) (POT) in connection with ultra-thin membranes formulated different selective receptors (i.e., ionophores) are proposed for detection of lead, copper and silver ions (Pb2+, Cu2+ Ag+). The working mechanism the POT-membrane electrode is interconnected charge transfer processes both sides membrane, overall process dependi...

Journal: :Analytical chemistry 2008
Apon Numnuam Karin Y Chumbimuni-Torres Yun Xiang Ralph Bash Panote Thavarungkul Proespichaya Kanatharana Ernö Pretsch Joseph Wang Eric Bakker

We here report on the first example of an aptamer-based potentiometric sandwich assay of proteins. The measurements are based on CdS quantum dot labels of the secondary aptamer, which were determined with a novel solid-contact Cd2+-selective polymer membrane electrode after dissolution with hydrogen peroxide. The electrode exhibited cadmium ion detection limits of 100 pM in 100 mL samples and o...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2001
M Shamsipur M R Ganjali A Rouhollahi

A PVC-based membrane electrode for lead ions based on hexathia-18-crown-6-tetraone as membrane carrier was prepared. The influence of membrane composition, pH of test solution and foreign ions on the electrode performance were investigated. The electrode showed a Nernstian response over a lead concentration range from 1.0 x 10(-6) to 8.0 x 10(-3) M at 25 degrees C, and was found to be very sele...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2001
N Aslan A Kenar O Atakol E Kilic

A new nitrate-selective liquid-membrane electrode based on the tris(2,2',2"-salicylideneimino)triethylamine-iron(III) complex has been developed. This electrode exhibits a linear Nernstian response over the range 10(-1)-10(-4) M of nitrate, with a slope of 54.3 +/- 0.9 mV per p[NO3]. The effects of the pH and the liquid-membrane composition were also investigated. The lifetime of the electrode ...

Farnoush Faridbod, Mina Bahman

A new selectophore was introduced for Cu2+ ions. Spectroscopic studies showed a selectivity of a new organic compound (L) toward copper ions and several transitional metal ions. Hence, L was utilized in designing several ion selective electrodes for these cations. In practice, Cu2+ ion selective electrode behaved Nernstian (slope of 27.95±0.3 mV decade-1) over a...

A novel potentiometric ion-selective PVC membrane sensor for analysis of atorvastatin (AT) in pharmaceutical preparations based on atorvastatin-(tetraphenyl borate), (AT-(TPB)2) as sensing element, tetraphenyl borate as additive and tris-2-ethyl-hexyl phosphate (TOP) as plasticizer solvent was prepared. The electrode shows a good Nernestian response over the concentration range of 0.09–5586 µ...

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