Hydration and contact ion pairing of Ca2+ with Cl− in supercritical aqueous solution

2006 ◽  
Vol 125 (9) ◽  
pp. 094507 ◽  
Author(s):  
John L. Fulton ◽  
Yongsheng Chen ◽  
Steve M. Heald ◽  
Mahalingam Balasubramanian
Keyword(s):  
Aqueous Solution ◽  
Ion Pairing ◽  
Supercritical Aqueous Solution

scholarly journals Determination of DiazaCon in Quail Feed and Quail Serum by Ion Pair Reversed-Phase Chromatography

2001 ◽  
Vol 84 (3) ◽  
pp. 634-639 ◽  
Author(s):  
John J Johnston ◽  
Margaret J Goodall ◽  
Jerome C Hurley ◽  
Christi A Yoder ◽  
Lowell A Miller
Keyword(s):  
Aqueous Solution ◽  
Ion Pairing ◽  
Reversed Phase ◽  
Ion Pair ◽  
Butyl Chloride ◽  
Reversed Phase Chromatography ◽  
Limits Of Detection ◽  
The Mean ◽  
Liquid Chromatographic

Abstract Liquid chromatographic (LC) methods were developed for quantitating the potential avian contraceptive DiazaCon in quail feed and serum. DiazaCon was extracted from ground quail feed with basic n-butyl chloride. The n-butyl chloride extract was evaporated to dryness. The DiazaCon residues were dissolved in an aqueous methanolic ion pairing solution and quantitated by LC at 206 nm. Avian sera was combined with an equal volume of a pH 4 aqueous solution of ion pairing reagent and filtered to remove interfering proteins. DiazaCon was quantitated by LC. Mean recoveries for 500 and 2000 ppm fortified feed were 89.1 and 91.0%, respectively. The mean recovery for sera fortified at 5 levels ranging from 35 to 2000 ppm was 84.9%. Method limits of detection were approximately 14 and 13 ppm for feed and sera, respectively.

Organic–inorganic macroion coacervate complexation

Soft Matter ◽  
2017 ◽  
Vol 13 (28) ◽  
pp. 4881-4889 ◽  
Author(s):  
Benxin Jing ◽  
Jie Qiu ◽  
Yingxi Zhu
Keyword(s):  
Aqueous Solution ◽  
Ion Pairing ◽  
Zwitterionic Polymers

Biphasic coacervate complexes resulting from ion pairing can be formed with zwitterionic polymers and inorganic multivalent macroions in salted aqueous solution.

The effect of cation size on ion pairing of methyl orange dye with tetraalkylammonium and benzyltrialkylammonium ions in aqueous solution

1976 ◽  
Vol 5 (10) ◽  
pp. 709-719 ◽  
Author(s):  
Richard L. Reeves ◽  
Hyman L. Cohen ◽  
Shelley A. Harkaway ◽  
C. Jameson Kaiser
Keyword(s):  
Aqueous Solution ◽  
Methyl Orange ◽  
Ion Pairing ◽  
Methyl Orange Dye ◽  
Cation Size

The effect of counterion on alkali ion-crown complex formation: A near-paradox in dissociating solvents

1983 ◽  
Vol 48 (9) ◽  
pp. 2509-2517
Author(s):  
Jiří Závada ◽  
Václav Pechanec ◽  
Oldřich Kocián
Keyword(s):  
Aqueous Solution ◽  
Complex Formation ◽  
Ion Pairing ◽  
Ethanolic Solution ◽  
Dramatic Effect ◽  
Widespread Belief ◽  
Alkali Ion

Contrary to the widespread belief that counterion influences stability of charged complexes only in poorly solvating media, a dramatic effect of anion was discovered, ebulliometrically, in 0.6 molal M+X--C2H5OH (M = K, Na, Li; X = SCN, OC2H5) and in 0.6 molal M+X--H2O (M = K; X = SCN, OH) solution upon complexing with 18-crown-6,15-crown-5 and 12-crown-4. Out of the nine crown-MSCN combinations examined in the ethanolic solution, seven yielded 1 : 1 (18-crown-6-KSCN, 18-crown-6-NaSCN, 15-crown-5-NaSCN, 15-crown-5-LiSCN, 12-crown-4-KSCN) or 2 : 1 (15-crown-5-KSCN, 12-crown-4-NaSCN) complexes quantitatively, whereas the corresponding crown-MOC2H5 combinations did not complex at all or the complexation was very incomplete. An analogous situation was found in the aqueous solution, with KSCN complexing 18-crown-6 quantitatively or 15-crown-5 and 12-crown-4 partly, whereas KOH did not yield complexes with any of the three crowns. Evidence is presented that the observed effect of anion does not originate from ion-pairing.

ChemInform Abstract: La[Fe(CN)6] Ion Pairing in Aqueous Solution. A Dielectric Relaxation Study.

ChemInform ◽  
2010 ◽  
Vol 30 (12) ◽  
pp. no-no
Author(s):  
Richard Buchner ◽  
Josef Barthel ◽  
Bernard Gill
Keyword(s):  
Aqueous Solution ◽  
Dielectric Relaxation ◽  
Ion Pairing ◽  
Relaxation Study
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