共查询到20条相似文献,搜索用时 15 毫秒
1.
Ashok Kumar Singh Koteswara Rao Bandi Anjali Upadhyay A.K. Jain 《Materials science & engineering. C, Materials for biological applications》2013,33(2):626-633
Poly(vinyl chloride)-based membranes of two ligands 2,4-bis(2-acetoxybenzylamino)-6-phenyl-1,3,5-triazine (L1) and N2,N4-di(cyanoethyl)-2,4-bis(2-acetoxybenzylamino)-6-phenyl-1,3,5-triazine (L2) were fabricated and explored as Mn2 + ion selective electrodes. The performance of the polymeric membranes electrodes of ionophores with different plasticizers (dibutylphthalate, benzoic acid, o-nitrophenyloctyl ether, 1-chloronapthalene and tri-n-butylphosphate) and anion excluders (sodium tetraphenylborate and potassium tetrakis p-(chloro phenyl)borate) was looked in to and the better results were obtained with the membrane having composition L2: NaTPB: DBP: PVC as 6: 3: 56: 35 (w/w; mg). The coated graphite electrode (CGE) with same composition was also fabricated and investigated as Mn2 + selective electrode. It was found that CGE showed better response characteristics than PME. The potentiometric response of CGE was independent of pH in the range 3.0–9.0 exhibiting the Nernstian slope 29.5 ± 0.3 mV decade? 1 of activity and working concentration range 4.1 × 10? 7–1.0 × 10? 1 mol L? 1 with a limit of detection 6.7 × 10? 8 mol L? 1. The electrode showed a fast response time of 12 s with a shelf life of 105 days. The proposed CGE could be successfully used for the determination of Mn2 + ions in different water, soil, vegetables and medicinal plants also used as an indicator electrode in potentiometric titration with EDTA. 相似文献
2.
Roya Mohammad Zadeh kakhki Gholamhossein Rounaghi 《Materials science & engineering. C, Materials for biological applications》2011,31(8):1637-1642
A uranyl cation selective electrode based on benzo-15-crown-5(B15C5) incorporated into a polyvinylchloride (PVC) membrane has been developed. The electrode was prepared by coating the surface of a graphite rod by a membrane containing dioctylphtalate (DOP) as plasticizer, B15C5 as an ionophore, carbon powder and polyvinylchloride (PVC) in tetrahydrofuran (THF). The best composition of the coated membrane (w/w%) was found to be: 4% ionophore, 20% plasticizer, 56% PVC and 20% carbon powder. The electrode exhibits a Nernstian slope (29.5 ± 2 mv) over the concentration range from 1.0 × 10? 4 to 1.0 × 10? 1 M. The detection limit of the electrode is 1.0 × 10? 4 M. The effects of the pH and the possible interfering cations and anions were investigated and the optimized conditions for electrode were evaluated. The response time of the electrode is about 15 s and it can be used for more than 6 weeks without observing any divergence in potentiometric response. The electrode was applied as indicator electrode in potentiometric titrations. 相似文献
3.
Hassan Ali Zamani Mehdi Nekoei Majid Mohammadhosseini Mohammad Reza Ganjali 《Materials science & engineering. C, Materials for biological applications》2010,30(3):480-483
In this study, a new thulium(III) membrane sensor was constructed. The proposed membrane sensor was fabricated based on a membrane containing 2% sodium tetraphenyl borate (NaTPB) as an anionic additive, 65% benzyl acetate (BA) as solvent mediator, 3% 1-(2-thiazolylazo)-2-naphthol (TN) as ionophore, and 30% poly(vinyl chloride) (PVC). The proposed Tm3+ electrode exhibits a Nernstian response of 19.5 ± 0.2 mV per decade of thulium concentration, and has a lower detection limit of 8.7 × 10? 7 mol L? 1. The linear range of the sensors was 1.0 × 10? 6 to 1.0 × 10? 2 mol L? 1. It works well in the pH range of 3.2–9.5. Moreover, the recommended selective sensor revealed a comparatively satisfactory selectivity regarding most of the alkali, alkaline earth, some transition and heavy metal ions. The membrane sensor was applied to the determination of fluoride ions in mouth wash samples. 相似文献
4.
Hassan Ali Zamani Ali Arvinfar Fatemeh Rahimi Alihossien Imani Mohammad Reza Ganjali Soraia Meghdadi 《Materials science & engineering. C, Materials for biological applications》2011,31(2):307-312
A new Pr3+ poly vinyl chloride PVC membrane sensor based on a membrane containing 3% N,N′-bis(4-hydroxysalicylidene)-1-3-phenylenediamine (HSPDA) as an ionophore, 2% sodium tetraphenyl borate (NaTPB) as an anionic additive, 65% benzyl acetate (BA) as solvent mediator and 30% poly(vinyl chloride) was prepared. This sensor responds to praseodymium ion in a wide linear dynamic range of 1.0 × 10?6 to 1.0 × 10?2 mol L?1 with Nernstian slope of 19.8 ± 0.4 mV per decade and a detection limit of 5.7 × 10?7 mol L? 1 in pH range of 3.1 to 9.8. It has a fast response time of ~5 s in the whole concentration range, and can be used for at least 2 months without any considerable divergences in the potentials. The proposed sensor displays an excellent selectivity for Pr3+ ions with respect to a large number of alkali, alkaline earth, transition and heavy metal ions. The developed sensor was successfully applied as an indicator electrode in Pr3+ ion potentiometric titration with EDTA, and in direct determination of fluoride ion in two mouth wash samples. 相似文献
5.
《Materials Letters》2005,59(19-20):2433-2436
The lithium solubility limit, photoluminescence (PL) and photoluminescence excitation (PLE) properties of lithium ion co-activated ZnGa2O4:Bi3+,Li+ phosphor have been investigated. A LiGaO2 second phase began to appear from 3 mol% Li+ ion co-activated ZnGa2O4:Bi3+,Li+ phosphor. The enhanced brightness of blue (λex = 254 nm) and white (λex = 315 nm) colors of bismuth ions doped ZnGa2O4:Bi3+,Li+ phosphor was assigned to the formation of LiGaO2. Bi3+ activated lithium zinc gallate phosphor showed a more enhanced PLE peak around 315 nm than that of lithium zinc gallate phosphor when λem = 520 nm. Thus, we observed that the PL intensity of ZnGa2O4:Bi3+,Li+ phosphor with λem = 520 nm was much greater than that of ZnGa2O4:Li+ phosphor. Also, ZnGa2O4:Bi3+,Li+ phosphor exhibited a shorter decay time than that of ZnGa2O4:Li+ phosphor by about a factor of about 2. 相似文献
6.
Mohammad Reza Ganjali Parviz Norouzi Alireza Atrian Farnoush Faridbod Soraia Meghdadi Masoud Giahi 《Materials science & engineering. C, Materials for biological applications》2009,29(1):205-210
The biological properties of the lutetium as well as other lanthanide ions, primarily based on their similarity to calcium, have been the bases for research into potential therapeutic applications of lanthanide series since the early part of the twentieth century. In this research, a Lu(III) potentiometric membrane sensor based on N,N′-bis(2-pyridinecarboxamide)-1,2-ethane (PCAE) is described. The sensor exhibits a Nernstian response over a concentration range of 1.0 × 10? 6 mol L? 1–1.0 × 10? 1 mol L? 1, with a detection limit of 6.0 × 10? 7 mol L? 1. The best performance was achieved with a membrane composition, consisting of 30% PVC, 63% o-nitrophenyl octyl ether (NPOE), 5% PCAE and 2% sodium tetraphenylborate (NaTPB). It was found that at the pH range of 4.0–9.0, the potential response of the sensor was not affected by the pH. Furthermore, the electrode presents satisfactory reproducibility, very fast response time (5 s) and relatively good discriminating ability for Lu(III) ions with respect to many common cations and other lanthanide ions. The sensor has been applied to the determination of Lu(III) in human serum and in some soil samples where domestic devices were stored. 相似文献
7.
Hassan Ali Zamani Mohammad Reza Ganjali Hossien Behmadi Mohammad Ali Behnajady 《Materials science & engineering. C, Materials for biological applications》2009,29(5):1535-1539
The construction, performance characteristics, and application of a novel iron(III) membrane sensor based on a new bis-benzilthiocarbohydrazide (BBTC) are reported in this paper. The sensor is prepared by incorporating of BBTC, nitrobenzene (NB), and sodium tetraphenyl borate (NaTPB) into a plasticized poly(vinyl chloride) membrane. The electrode reveals a Nernstian behavior over a wide iron ion concentration range (1.0 × 10? 2–1.0 × 10? 7 mol L? 1), and relatively low detection limit (8.6 × 10? 8 mol L? 1). The potentiometric response is independent on the pH of the solution in the range of 1.6–4.3. The electrode shows a very short response time (< 10 s). The proposed electrode can be used for at least nine weeks without any considerable divergence in potentials. It exhibits very good selectivity relative to a wide variety of alkali, alkaline earth, transition and heavy metal ions. In fact, the selectivity of the proposed sensor shows great improvements compared to the previously reported electrodes for the iron ion. Also, the sensors accuracy was investigated in two ways: (i) with the potentiometric titration of a Fe(III) solution with EDTA and (ii) with the Fe(III) monitoring in river and wastewater samples. 相似文献
8.
Hassan Ali Zamani Babak Feizyzadeh Farnoush Faridbod Mohammad Reza Ganjali 《Materials science & engineering. C, Materials for biological applications》2011,31(7):1379-1382
A thulium(III) membrane sensor was made using 2% sodium tetraphenyl borate (NaTPB), 65% dibutylphthalate (DBP), 30% poly(vinyl chloride) (PVC) and 3% 1-ethyl-3-(2,5-dihydro-4-(3,5-dimethyl-1H-pyrazol-4-yl)-5-oxo-1H-pyrazol-3-yl)thiourea (ET) as an ionophore. Conductometric study shows selectivity of the Et toward Tm3+ ions. Nernstian response of 19.6 ± 0.4 mV per decade of thulium concentration was observed, and the electrode worked well in concentration range of 1.0 × 10? 6 to 1.0 × 10? 2 mol L? 1 with a lower detection limit (LDL) of 7.2 × 10? 7 mol L? 1, in a pH range of 4.3–10.4. The selectivity of the sensor over alkaline, alkaline earth, transition and heavy metal ions was also found to be in a satisfactory range. To check the analytical applicability of the proposed Tm3+ sensor, it was successfully used as an indicator electrode in analysis of thulium in certified reference materials. 相似文献
9.
Mehrorang Ghaedi Sakineh Naderi Morteza Montazerozohori Reza Sahraei Ali Daneshfar Narges Taghavimoghadam 《Materials science & engineering. C, Materials for biological applications》2012,32(8):2274-2279
A new Cu2+ carbon paste electrode (CPE) using 2,2′-(1E,1′E)-1,1′-(2,2′-azanediylbis (ethane-2,1-diyl)bis(azan-1-yl-1-ylidene))bis(ethan-1-yl-1-ylidene)diphenol (ADEZEDP) has been prepared. The influence of variables including sodium tetraphenylborate (NaTPB), ionophore, and amount of multiwalled carbon nanotubes (MWCNT), CdO nanowires, CdS nanoparticles and palladium nanoparticles loaded on ADEZEDP and Nujol on the electrodes response were studied and optimized. At optimum values of all variables, for each nanomaterial the electrode response was linear in concentration range of 1.0 × 10? 8 to 1.0 × 10? 1 mol L? 1 for ADEZEDP with Nernstian slope. The good performance of electrode viz. Wide applicable pH range (2.0–5.0), fast response time (≈ 6 s), and adequate life time (3 months) indicate the utility of the proposed electrodes for evaluation of Cu2+ ion content in various situations. Finally, these electrodes have been successfully applied for the determination of Cu2+ ions content in various real samples. The selectivity of proposed electrode was evaluated by separation solution method and fixed interference method. 相似文献
10.
Hassan Ali Zamani Mohammad Saleh Zabihi Mitra Rohani Abbas Zangeneh-Asadabadi Mohammad Reza Ganjali Farnoush Faridbod Soraia Meghdadi 《Materials science & engineering. C, Materials for biological applications》2011,31(2):409-413
Solution study showed N,N′-bis(5-nitrosalicylidene)-2-aminobenzylamin (L) trends toward Tb3+ ion. Then, it was used as a suitable ionophore in construction of terbium ion selective electrode. The electrode with composition of 30% PVC, 65% solvent mediator (NB), 3% ionophore (L) and 2% anionic additive (NaTPB) shows the best potentiometric response characteristics. It displays a Nernstian behavior (20.1 mV decade?1) over the concentration range 1.0 × 10? 6 to 1.0 × 10? 2 mol L?1. The detection limit of the electrode is 6.3 × 10? 7 mol L?1. It has a very short response time (~ 10 s) and a useful working pH range of 2.6–9.4 for at least 2 months. The proposed membrane sensor shows excellent discriminating ability towards Tb3+ ions with regard to several alkali, alkaline earth, transition and heavy metal ions. To investigate the analytical applicability of the sensor, it was successfully applied to the determination of terbium in certified reference material. 相似文献
11.
Hassan Ali Zamani Abbas Zanganeh-Asadabadi Mitra Rohani Mohammad Saleh Zabihi Javad Fadaee Mohammad Reza Ganjali Farnoush Faridbod Soraia Meghdadi 《Materials science & engineering. C, Materials for biological applications》2013,33(2):984-988
In this research, we report a new Ho3 +-PVC membrane electrode based on N-(4,5-dimethyl-2-(picolinamido)phenyl)picolinamide (H2Me2bpb) as a suitable ion carrier. Poly vinylchloride (PVC)-based membrane composed of H2Me2bpb with oleic acid (OA) as anionic additives, and o-nitrophenyloctyl ether (NPOE) as plasticized solvent mediator. The sensor exhibits a Nernstian slope of 20.1 ± 0.2 mV decade? 1 over the concentration range of 1.0 × 10? 6 to 1.0 × 1? 2 mol L? 1, and a detection limit of 5.0 × 10? 7 mol L? 1 of Ho3 + ions. The potentiometric response of the sensor is independent of the solution pH in the range of 3.5–9.4. It has a very short response time, in the whole concentration range (< 10 s), and can be used for at least eight weeks. The proposed electrode shows a good selectivity towards Ho3 + ions over a wide variety of cations, including alkali, alkaline earth, transition and heavy metal ions. To assess its analytical applicability the proposed Ho3 + sensor was successfully applied as an indicator electrode in the titration of Ho3 + ion solutions in certified reference materials, alloy samples and for the determination of the fluoride ion in two mouthwash preparations. 相似文献
12.
Zhenning Yan Yuanchao Pei Jing Fan Shuangqiang Wang Jianji Wang 《Materials science & engineering. C, Materials for biological applications》2013,33(1):356-361
The feasibility of the newly synthesized ionic associates L1 and L2 formed by ionic liquid [C4mim][PF6] and cationic dyes (malachite green and methylene blue) has been tested as a novel ionophore for the preparation of anion-selective polymeric membrane electrodes. The electrode exhibits Nernstian response and enhanced potentiometric selectivity towards [PF6]? compared to many other anions. The influence of some experimental parameters such as membrane composition, nature of plasticizer and amount of additive on the potential response of the [PF6]? sensor are investigated. Under the optimized conditions, the response slopes of the membrane electrodes towards [PF6]? are 59.7 ± 0.5 and 58.1 ± 0.5 mV/decade based on ionophore L1 and L2, respectively, in 1.0 × 10? 5–1.0 × 10? 1 or 1.0 × 10? 6–1.0 × 10? 1 mol/L concentration range. Interestingly, the optimized electrodes based on ionophores L1 and L2 also exhibit Nernstian response characteristics (60.3 ± 0.5 and 56.0 ± 0.5 mV/decade) for tetrafluoroborate anion [BF4]? in a wide concentration range. Thus, the proposed sensor has been used for the determination of [PF6]? and [BF4]? in aqueous ionic liquids samples and the solubility of the [PF6]? and [BF4]? based ionic liquids in water. The satisfactory results are obtained. 相似文献
13.
Hassan Ali Zamani Farnoush Faridbod Mohammad Reza Ganjali 《Materials science & engineering. C, Materials for biological applications》2013,33(2):608-612
A novel Dy(III) ion-selective PVC membrane sensor was made using a new synthesized organic compound, 3,4-diamino-N′-((pyridin-2-yl)methylene)benzohydrazide (L) as an excellent sensing element. The electrode showed a Nernstian slope of 19.8 ± 0.6 mV per decade in a wide concentration range of 1.0 × 10? 6–1.0 × 10? 2 mol L? 1, a detection limit of 5.5 × 10? 7 mol L? 1, a short conditioning time, a fast response time (< 10 s), and high selectivity towards Dy(III) ion in contrast to other cations. The proposed sensor was successfully used as an indicator electrode in the potentiometric titration of Dy(III) ions with EDTA. The membrane sensor was also applied to the F– ion indirect determination of some mouth washing solutions and to the Dy3 + determination in binary mixtures. 相似文献
14.
Mehrorang Ghaedi Habibolah Khajehsharifi Morteza Montazerozohori Hossain Tavallali Khadijeh Tahmasebi Saeid Khodadoust 《Materials science & engineering. C, Materials for biological applications》2012,32(4):674-679
A new copper carbon paste electrode (CPE) based on incorporation bis(2, 4-dihydroxybenzyliden)-1,6-diaminohexane (DHBDAH) in graphite powder matrix has been described. The influence of variables including an amount of graphite, sodium tetraphenylborate (NaTPB), DHBDAH and nujol on the Cu2+ carbon paste electrode response was studied and optimized. The optimum carbon paste composition was set as follows, graphite powder: NaTPB: Nujol: DHBDAH with amount of 150:2.3:30:4 mg, respectively. At the optimum conditions, the potential response is linear over the concentration range of 5.0 × 10? 8 to 1.0 × 10? 1 mol L? 1 with a Nernstian slope of 29.5 ± 1.1 mV per decade of Cu2+ ion concentration. The good performance of electrode such as low detection limit of (LOD) (4 × 10? 8 mol L? 1), wide applicable pH range (2.5–5.5), fast response time (?10 s) and adequate shelf life (69 days) indicate the utility of the proposed electrode for evaluation of Cu2+ ion content in various analysis. Due to moderate potentiometric selectivity coefficients of proposed electrode obtained by fixed interference method (FIM) and separate solution method (SSM), the proposed electrode successfully can be applied for the determination of Cu2+ ions content in some real samples. 相似文献
15.
M.R. Ganjali M. Hosseini A. Ghafarloo M. Khoobi F. Faridbod A. Shafiee P. Norouzi 《Materials science & engineering. C, Materials for biological applications》2013,33(7):4140-4143
(E)-2-(1-(4-hydroxy-2-oxo-2H-chromen-3-yl)ethylidene)hydrazinecarbothioamide (L) has been used to detect trace amounts of praseodymium ion in acetonitrile–water solution (MeCN/H2O) by fluorescence spectroscopy. The fluorescent probe undergoes fluorescent emission intensity enhancement upon binding to Pr3 + ions in MeCN/H2O (9/1:v/v) solution. The fluorescence enhancement of L is attributed to a 1:1 complex formation between L and Pr3 +, which has been utilized as the basis for selective detection of Pr3 +. The sensor can be applied to the quantification of praseodymium ion with a linear range of 1.6 × 10? 7 to 1.0 × 10? 5 M. The limit of detection was 8.3 × 10? 8 M. The sensor exhibits high selectivity toward praseodymium ions in comparison with common metal ions. The proposed fluorescent sensor was successfully used for determination of Pr3 + in water samples. 相似文献
16.
Hassan Ali Zamani Fatemeh Naghavi-Reyabbi Farnoush Faridbod Majid Mohammadhosseini Mohammad Reza Ganjali Azadeh Tadjarodi Maryam Rad 《Materials science & engineering. C, Materials for biological applications》2013,33(2):870-874
A new ion-selective electrode for Sm3 + ion is described based on the incorporation of N,N′,N″-tris(4-pyridyl)trimesic amide (TPTA) in a poly(vinylchloride) (PVC) matrix. The membrane sensor comprises nitrobenzene (NB) as a plasticizer, and oleic acid (OA) as an anionic additive. The sensor with the optimized composition shows a Nernstian potential response of 19.8 ± 0.5 mV decade? 1 over a wide concentration range of 1.0 × 10? 2 and 1 × 10? 6 mol L? 1, with a lower detection limit of 4.7 × 10? 7 mol L? 1 and satisfactor applicable pH range of 3.6–9.2. Having a short response time of less than 10 s and a very good selectivity towards the Sm3 + over a wide variety of interfering cations (e.g. alkali, alkaline earth, transition and heavy metal ions) the sensor seemed to be a promising analytical tool for determination of the Sm3 +. Hence, it was used as an indicator electrode in the potentiometric titration of samarium ion with EDTA. It was also applied to the direct samarium recovery in binary mixtures. 相似文献
17.
Hassan Ali Zamani Mohammad Reza Ganjali Parviz Norouzi Azadeh Tadjarodi Encyeh Shahsavani 《Materials science & engineering. C, Materials for biological applications》2008,28(8):1489-1494
A poly (vinyl chloride)-based membrane of N, N-Dimethyl-N′, N″-bis(4-methoxyphenyl)phosphoramidate (DMP) as a neutral carrier was prepared and investigated as a Tb3+-selective electrode. This electrode constructed with sodium tetraphenylborate (NaTPB) as the anion excluder and 2-nitrophenyl octyl ether (NPOE) as the plasticizer. Its performance was found to be the following: a Nernstian slope of 19.7 ± 0.4 mV per decade across a broad range (1.0 × 10− 6 to 1.0 × 10− 1 M); a detection limit of 8.0 × 10− 7 M between the pH values of 3.5 and 8.0; additionally, the response time was about 10 s; usage of more than 2 months without any potential divergence; good Tb3+ selectivity over a wide variety of other metal ions. The membrane sensor was applied to the Tb3+ recovery from different water samples, determination of fluoride ions in mouth wash samples and the determination of Tb3+ in phosphate rock samples. It was also used as an indicator electrode in the potentiometric titration of Tb3+ ions with EDTA. 相似文献
18.
Nickel analysis in real samples by Ni2 + selective PVC membrane electrode based on a new Schiff base
Praveen Kumar Tomar Sulekh Chandra Amrita Malik Ankit Kumar 《Materials science & engineering. C, Materials for biological applications》2013,33(8):4978-4984
A newly synthesized Schiff base 3-aminoacetophenonesemicarbazone (AAS) has been used for the preparation of Ni2 + selective PVC membrane electrode. The proposed electrode exhibits a Nernstian response over the nickel concentration range of 1.0 × 10? 7 to 1.0 × 10? 2 mol L? 1 with a slope of 30.0 ± 0.3 mV/decade of concentration. The limit of detection as determined from the intersection linear segment of the calibration plot is 5.1 × 10? 8 mol L? 1. The electrode shows good selectivity towards nickel with respect to several alkali, alkaline earth, transition and heavy metal ions. The response time of the electrode is very fast (≥ 10 s) and can be used for 17 weeks in the pH range of 2.0–9.8. The electrode can also be used in partially non-aqueous media having up to 20% (v/v) methanol, ethanol or acetone content with no significant change in the value of slope or working concentration range. To investigate the analytical applicability of the electrode, it was successfully applied as an indicator electrode in Ni2 + ion potentiometric titration with EDTA, and in direct determination of nickel(II) in real samples. 相似文献
19.
M. Hosseini S. Dehghan Abkenar M.R. Ganjali F. Faridbod 《Materials science & engineering. C, Materials for biological applications》2011,31(2):428-433
A highly selective and sensitive zinc ion-selective membrane electrode based on N,N′-phenylenebis (salicylideaminato) (L) as a new carrier is reported. The membrane is composed of poly (vinyl chloride) (PVC), o-nitrophenyl octyl ether (NPOE) as plasticizer, potassium tetrakis(p-chlorophenyl) borate (KTpClPB) as lipophilic ionic additive, and L as sensing material. The proposed electrode displays a Nernstian response to Zn2+ ions over a wide concentration range of 5.0 × 10? 7–1.0 × 10? 1 M with the slope of 29.4 ± 0.2 mV per decade and a detection limit of 2.6 × 10? 7 M. The sensor has a relatively fast response time of < 10 s and it can be used in the pH range of 3.0–7.0 for at least 2 months without any significant divergency in potential. The selectivity coefficients for mono-, di-, and trivalent cations indicate the good selectivity of sensor for Zn2+ ions over a large number of interfering cations. As a result the proposed electrode was applied to Zn2+ ions determination in mixture solutions and wastewater samples. 相似文献
20.
Ali R. Firooz Ali A. Ensafi K. Karimi H. Sharghi 《Materials science & engineering. C, Materials for biological applications》2013,33(7):4167-4172
A novel optode for determination of Hg(II) ions is developed based on immobilization of a recently synthesized ionophore, 7-(1H-imidazol-1-ylmethyl)-5,6,7,8,9,10-hexahydro-2H-1,13,4,7,10 benzodioxatriaza cyclopentadecine-3,11(4H,12H)-dione, in a PVC membrane. Dioctyl sebacate was used as a plasticizer, sodium tetraphenylborate as an anionic additive and ETH5294 as a chromoionophore. The response of the optode was based on the complexation of Hg(II) with the ionophore in the membrane phase, resulting an ion exchange process between Hg(II) in the sample solution and H+ in the membrane. The effects of pH and amounts of the ionophore, chromoionophore, ionic additive and type of plasticizer on the optode response were investigated. The selectivity of the optode was studied in the present of several cations. The optode has a linear response to Hg(II) in the range of 7.2 × 10? 13–4.7 × 10? 4 mol L? 1 with detection limit of 0.18 pmol L? 1. The optode was successfully applied to the determination of Hg(II) in real samples. 相似文献