Anion-Exchange Extraction of Doubly Charged Anions by Higher Quaternary Ammonium Salts with Different Steric Accessibility of the Exchange Center

2020 ◽  
Vol 75 (6) ◽  
pp. 711-716
Author(s):  
Yu. V. Matveichuk ◽  
D. V. Stanishevskii
Keyword(s):  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Steric Accessibility ◽  
Exchange Extraction ◽  
Doubly Charged

scholarly journals Preparation and properties of anion exchange membranes based on spirocyclic quaternary ammonium salts

2018 ◽  
Vol 64 (2) ◽  
pp. 165-171 ◽  
Author(s):  
Fei Xu ◽  
Wensen Yuan ◽  
Yuanyuan Zhu ◽  
Xufeng Chu ◽  
Bencai Lin ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Anion Exchange Membranes

scholarly journals EFFECT OF STERIC ACCESSIBILITY OF EXCHANGE CENTER OF HIGHER QUATERNARY AMMONIUM SALTS AND PLASTICIZER NATURE ON CHARACTERISTICS OF ELECTRODES, REVERSIBLE TO DOUBLE-CHARGED ANIONS

2018 ◽  
Vol 59 (1) ◽  
pp. 9
Author(s):  
E.M. Rakhman’ko ◽  
Yu.V. Matveiychuk
Keyword(s):  
Detection Limit ◽  
Quaternary Ammonium ◽  
Limit Of Detection ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Ion Selective Electrodes ◽  
Selectivity Coefficients ◽  
Low Detection Limit ◽  
Order Of Magnitude ◽  
Steric Accessibility

The effect of the steric accessibility of the exchange center of higher quaternary ammonium salts and plasticizer nature on the selectivity and the limit of detection for film electrodes reversible to hydrophilic double-charged anions was studied. It was established the decrease in selectivity coefficients lgKi,jPot by 2.8−3.8 order of magnitude and low detection limit by 2−3 order of magnitude in the series of QAS: TOD≤TC<TL<TNODA<TB<TE<TM< DCPBTM. Also, the increase in low detection limit by 1−0.7 order of magnitude in the series of plasticizers: DBP>DDP>o-NPDE>1-BN was established. The composition of membranes of ion-selective electrodes was optimized.

scholarly journals Immobilization of quaternary ammonium salts on silica gel for perchlorate ions removal

2012 ◽  
Vol 10 (5) ◽  
pp. 1452-1458 ◽  
Author(s):  
Joanna Kurczewska ◽  
Radosław Pankiewicz ◽  
Grzegorz Schroeder
Keyword(s):  
Anion Exchange ◽  
Silica Gel ◽  
Quaternary Ammonium ◽  
Silica Surface ◽  
Water Solution ◽  
Parametric Method ◽  
Quaternary Ammonium Salts ◽  
Chloride Ions ◽  
Ammonium Salts ◽  
Good Ability

AbstractSilica surface was modified with quaternary ammonium salts to give three matrices of different chain length. The synthesized supports were characterized by elemental analysis and infrared spectroscopy, as well as scanning electron microscopy and semi-empirical parametric method 5. Their exchange capacities for ClO4−, F−, NO3− and CH3COO− ions were investigated by conductometric titration. The amount of exchanged chloride ions from the matrix was studied for different initial anions concentration. The functionalized silica gel showed very good ability of perchlorate ions exchange from the water solution in room temperature. The anion-exchange properties were also studied in comparison to different number of reactive sites in the matrices. The increased number of chloride at the silica surface took effect on increased ability of ClO4− anion exchange

Poly(arylene ether sulfone) crosslinked networks with pillar[5]arene units grafted by multiple long-chain quaternary ammonium salts for anion exchange membranes

2020 ◽  
Vol 56 (6) ◽  
pp. 928-931 ◽  
Author(s):  
Jinwu Peng ◽  
Minhui Liang ◽  
Zhenchao Liu ◽  
Peng Wang ◽  
Chengying Shi ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Anion Exchange Membranes ◽  
Arylene Ether ◽  
Crosslinked Networks ◽  
First Time ◽  
Long Chain

For the first time, high-molecular-weight pillar[5]arene-containing aromatic polymers were synthesized and further modified for application as anion exchange membranes.

scholarly journals Influence of plasticizer nature on the analytical characteristics of ion-selective electrodes based on higher quaternary ammonium salts reversible to doubly charged inorganic anions

2019 ◽  
Vol 54 (4) ◽  
pp. 428-433
Author(s):  
Yu. V. Matveichuk
Keyword(s):  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Ion Selective Electrodes ◽  
Qualitative Explanation ◽  
Hydrogen Phosphate ◽  
Lower Detection Limit ◽  
Born Model ◽  
Lower Detection ◽  
Doubly Charged

It has been established that membranes of carbonate and hydrogen phosphate selective electrodes based on higher quaternary ammonium salts are preferable to be plasticized with o-nitrophenyldecyl ether, membranes of sulfate, selenate, selenite-selective electrodes with 1-bromonaphthalene, sulfite, molybdate, tungstate-selective electrodes with dibutylphthalate. The use of an optimum plasticizer allows, in general, reducing both the lower detection limit of electrodes and the values of selectivity coefficients by about 1 order (depending on the interfering ion). A qualitative explanation is given to the results obtained from the Fouoss theory and the Born model.

Sign in / Sign up

Export Citation Format

Share Document