scholarly journals Preliminary Study of Poly(Tetrahydrofurfuryl Acrylate) Thin Film as a Potential Material of Ion Selective Electrodes: The Case of Nitrate Ion-Selective Electrode

2020 ◽  
Vol 20 (3) ◽  
pp. 645
Author(s):  
Sagir Alva ◽  
Robi Suherman ◽  
Vivi Friliandita ◽  
Deni Shidqi Khaerudini ◽  
Edy Herianto Majlan ◽  
...  
Keyword(s):  
Limit Of Detection ◽  
Selectivity Coefficient ◽  
Ion Selective Electrode ◽  
Ion Concentration ◽  
Fish Ponds ◽  
Selective Electrode ◽  
Sensing Matrix ◽  
Nitrate Ion ◽  
Preliminary Study ◽  
Tetrahydrofurfuryl Acrylate

A preliminary study on the use of a photocurable poly-tetrahydrofurfuryl acrylate (pTHFA) has been successfully performed as an alternative membrane for application in the Ion-Selective Electrode (ISE) sensors such as Nitrate-ISE. The pTHFA membrane was synthesized using photopolymerization technique and further optimized by varying the concentration of the photo-initiator. The pTHFA photopolymer was characterized by C-NMR, H-NMR, FTIR, and DSC. The best sensing formulation comprising pTHFA photopolymer was obtained from composition II with Tg of -17.3 °C. In the Nitrate-ISE fabrication process, initially, the tetraoctylammonium nitrate (TOAN) ionophore was optimized. The optimum TOAN concentration of 4.2 mg was then immobilized onto composition II as a sensing matrix. Results showed that the pTHFA based ISE sensor exhibited a slope near the Nernstian number with a good linear response for detecting nitrate ion concentration between 10–1 to 10–4 M (r2 = 0.9994) and limit of detection as low as 3.47 × 10–5 M. Furthermore, the selectivity behavior of pTHFA based nitrate-ISE sensor was determined in various types of interfering ions such as SO42–, H2PO4–, HPO42–, Cl– and I–. The sensor has demonstrated selectivity coefficient of -2.27 ± 0.2, -2.49 ± 0.6, -2.18 ± 0.8, -1.31 ± 0.1 and 0.41 ± 0.2, respectively. The fabricated pTHFA ISE-Nitrate sensor was further tested in the fish ponds, soils, and also rivers. The sensors have shown excellent performance and is comparable to the standard method.

scholarly journals Electrochemical Characterization of Laboratory Fabricated Bromide Ion Selective Electrode

2016 ◽  
Vol 21 (1) ◽  
pp. 76-81 ◽  
Author(s):  
Armila Rajbhandari Nyachhyon ◽  
Krishna Manandhar ◽  
Raja Ram Pradhananga
Keyword(s):  
Electrochemical Impedance ◽  
Selectivity Coefficient ◽  
Electrode System ◽  
Ion Selective Electrode ◽  
Ion Concentration ◽  
Selective Electrode ◽  
Potentiometric Response ◽  
Bromide Ion ◽  
Silver Sulphide ◽  
Co Precipitation

Bromide ion selective electrode (Br-ISE) have been successfully fabricated in the laboratory. The polycrystalline Ag2S-AgBr membrane material of Br-ISE was prepared by co-precipitation of silver sulphide and silver bromide from aqueous solution and was characterized by X-ray diffractometry (XRD). XRD results showed that material is in mixed phase state having Ag3SBr, Ag2S and AgBr. Scanning electron microscopy (SEM) has been used to study the texture of the surface. The potentiometric response has been investigated by 2 electrode system whereas 3 electrode systems have been used for electrochemical impedance spectroscopy (EIS). The electrode was found to behave well up to the bromide concentration of 1x10-5M with a Nernstian slope of 58 mV per decade change in bromide ion concentration. The selectivity coefficient of electrode containing bromide ion in the presence of I- and Cl- ions was found to be 3.98 and 8x10-2, respectively indicating that I- and Cl- ions interfere in the response of bromide electrode to bromide ion. The EIS studies shows that the charge transfer process is the key mechanism that is going on at the electrode/ electrolyte interface and electrode/ back contact interface.Journal of Institute of Science and TechnologyVol. 21, No. 1, 2016, page: 76-81

scholarly journals A novel online coupling of ion selective electrode with the flow injection system for the determination of vitamin B1

2016 ◽  
Vol 13 (2) ◽  
pp. 458-469
Author(s):  
Baghdad Science Journal
Keyword(s):  
Flow Injection ◽  
Dynamic Range ◽  
Limit Of Detection ◽  
Vitamin B1 ◽  
Pharmaceutical Formulations ◽  
Ion Selective Electrode ◽  
Injection System ◽  
Selective Electrode ◽  
Flow Injection System

A simple, fast, selective of a new flow injection analysis method coupled with potentiometric detection was used to determine vitamin B1 in pharmaceutical formulations via the prepared new selective membranes. Two electrodes were constructed for the determination of vitamin B1 based on the ion-pair vitamin B1-phosphotungestic acid (B1-PTA) in a poly (vinyl chloride) supported with a plasticized di-butyl phthalate (DBPH) and di-butyl phosphate (DBP). Applications of these ion selective electrodes for the determination of vitamin B1 in the pharmaceutical preparations for batch and flow injection systems were described. The ion selective membrane exhibited a near-Nernstian slope values 56.88 and 58.53 mV / decade, with the linear dynamic range of vitamin B1 was 5 x 10-5- 1 x 10-2 and 1 x 10-4-1 x 10-2 mol.L-1, in batch and FIA, respectively. The limit of detection was 3.5 x 10-5 and 9.5 x 10-5 mol.L-1, with the percentage linearity 98.85 and 95.22 in batch and FIA, respectively. The suggested ion selective electrode has been utilized perfection in the determination of vitamin B1 in pharmaceutical formulations using batch and flow injection system, respectively.

scholarly journals Ionic Liquid-Multiwalled Carbon Nanotubes Nanocomposite Based All Solid State Ion-Selective Electrode for the Determination of Copper in Water Samples

Water ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 2869
Author(s):  
Cecylia Wardak ◽  
Karolina Pietrzak ◽  
Małgorzata Grabarczyk
Keyword(s):  
Carbon Nanotubes ◽  
Ionic Liquid ◽  
Solid State ◽  
Multiwalled Carbon Nanotubes ◽  
Water Samples ◽  
Limit Of Detection ◽  
Ion Selective Electrode ◽  
Selective Electrode ◽  
Multiwalled Carbon ◽  
Copper Determination

A new copper sensitive all solid-state ion-selective electrode was prepared using multiwalled carbon nanotubes-ionic liquid (1-butyl-3-methylimidazolium hexafluorophosphate) nanocomposite as an additional membrane component. The effect of nanocomposite content in the membrane on the electrode parameters was investigated. The study compares, among others, detection limits, sensitivity, and the linearity ranges of calibration curves. Content 6 wt.% was considered optimal for obtaining an electrode with a Nernstian response of 29.8 mV/decade. An electrode with an optimal nanocomposite content in the membrane showed a lower limit of detection, a wider linear range and pH range, as well as better selectivity and potential stability compared to the unmodified electrode. It was successfully applied for copper determination in real water samples.

Comparative between Ammonia Ion Selective Electrode and Dye Binding Method to study effect of Processing Methods on Protein Content of Plain Yogurt

2021 ◽  
pp. 6257-6261
Author(s):  
Heba Kashour ◽  
Lina Soubh
Keyword(s):  
Heat Treatment ◽  
Protein Content ◽  
Limit Of Detection ◽  
Ion Selective Electrode ◽  
Selective Electrode ◽  
Limit Of Quantitation ◽  
Precision Limit ◽  
Dye Binding ◽  
Orange G ◽  
Electrode Method

In this study, two analytical methods were used to determinate the protein, the ammonia ion selective electrode method and dye binding method using orange G and the spectrophotometer at λmax 478 nm by determining the linearity, accuracy, precision, limit of detection and limit of quantitation of each. In comparison, the dye binding method was chosen for its accuracy, repeatability, sensitivity (LOD, LOQ) and speed of performance. After that, it was applied to samples of prepared plain yogurt to study effect of different properties (source, heat treatment and type) of used milk on protein content of plain yogurt.

Analysis of Bromide Ion in Wine by Ion Selective Electrode

1976 ◽  
Vol 59 (1) ◽  
pp. 53-55
Author(s):  
James E Graf ◽  
Troy E Vaughn ◽  
William H Kipp
Keyword(s):  
Country Of Origin ◽  
Ion Selective Electrode ◽  
Ion Concentration ◽  
Selective Electrode ◽  
Bromide Ion

Abstract The use of the bromide ion selective electrode for the determination of bromide ion in wine has been found to be rapid and reliable. The method has been used for still wines and carbonated wines and is applicable to all wines regardless of their country of origin. The method consists of treating a 50 ml aliquot of wine with 2 ml each of 3.75M H3PO4, saturated KNO3, and 1M CuSO4. After 10 min the electrodes are immersed in the samples and a millivolt reading is obtained. One hundred μl 500 ppm bromide ion standard is added and the millivolt reading is taken. Bromide ion concentration in the wine = (CΔ × 1)/((antilog ΔE/S) − 1) where CΔ = 1, ΔE = the change in potential expressed in millivolts, and S = the electrode slope.

Ion-Selective Electrodes Sensitive to Organic Ions. I. The Saccharin Electrode

1974 ◽  
Vol 57 (5) ◽  
pp. 1205-1208
Author(s):  
Norio Hazemoto ◽  
Naoki Kamo ◽  
Yonosuke Kobatake
Keyword(s):  
Ion Association ◽  
Ion Selective Electrode ◽  
Ion Concentration ◽  
Ion Selective Electrodes ◽  
Selective Electrode ◽  
Organic Ions ◽  
Sodium Cyclamate

Abstract An ion-selective electrode responsive to saccharin was made by dissolving an ion association which exists between iron(II)-bathophenanthroline chelate and saccharin in nitrobenzene. The electrode developed was capable of measuring saccharin ion concentration in the presence of other sweetening substances, e.g., saccharose, glucose, sodium cyclamate, and sorbitol, over the concentration range of 10-1 to 10-5M.

scholarly journals Microfluidic Polymer Chip with an Embedded Ion-Selective Electrode Detector for Nitrate-Ion Assay in Environmental Samples

2010 ◽  
Vol 26 (4) ◽  
pp. 417-423 ◽  
Author(s):  
Takashi MASADOME ◽  
Kazuki NAKAMURA ◽  
Daisuke IIJIMA ◽  
Osamu HORIUCHI ◽  
Benjaporn TOSSANAITADA ◽  
...  
Keyword(s):  
Environmental Samples ◽  
Ion Selective Electrode ◽  
Selective Electrode ◽  
Nitrate Ion

Influence of extraction properties of PVC plasticizer membrane on the response of coated wire type ion selective electrode

1988 ◽  
Vol 53 (5) ◽  
pp. 912-920 ◽  
Author(s):  
Emil Halámek ◽  
Tomáš Čapoun ◽  
Jan Souček
Keyword(s):  
Distribution Coefficient ◽  
Electrode Potential ◽  
Ion Pair ◽  
Ion Selective Electrode ◽  
Ion Concentration ◽  
Pvc Membrane ◽  
Potential Range ◽  
Selective Electrode ◽  
Coated Wire ◽  
Extraction Properties

The authors studied the influence of the extraction properties of a PVC membrane plasticizer of a coated-wire type ion-selective electrode on its response in titrations of brucine and atropine with sodium tetraphenyl borate, as well as in potentiometric determinations of these compounds. The highest attainable value of the ion pair concentration in the plasticizer, which is limited by the distribution coefficient of the ion pair, determines the interval in which the electrode potential can be changed; and a linear dependence of the potential range of the titration curves on the logarithm of the ion-pair distribution coefficient was found. The slope of the dependence of the electrode potential on the logarithm of the ion concentration to be determined, found in potentiometric measurements, is proportional to the distribution coefficient of the ion which forms a pair with the ion to be determined and in whose solution the electrode membrane is activated between the measurements. The dependence of the slope of the electrode function on the logarithm of the product of the mentioned distribution coefficients is linear.

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