Determination of transference numbers with ion-selective electrodes. Transference numbers and activity coefficients of concentrated aqueous solutions of potassium fluoride

1987 ◽  
Vol 16 (6) ◽  
pp. 419-431 ◽  
Author(s):  
Hermann Weing�rtner ◽  
Bernd M. Braun ◽  
Jutta M. Schmoll
Keyword(s):  
Aqueous Solutions ◽  
Activity Coefficients ◽  
Potassium Fluoride ◽  
Transference Numbers ◽  
Ion Selective Electrodes ◽  
Concentrated Aqueous Solutions

scholarly journals Measurement and correlation of the activity coefficients of H+ and HSO3- in concentrated aqueous solutions of NaCl.

1996 ◽  
Vol 29 (4) ◽  
pp. 588-593
Author(s):  
Seiya Hirohama ◽  
Dai Takeda ◽  
Mamoru Iwasaki ◽  
Kazushige Kawamura
Keyword(s):  
Aqueous Solutions ◽  
Activity Coefficients ◽  
Concentrated Aqueous Solutions

Ion-selective electrodes for the determination of ionisation constants of sparingly soluble organic bases in aqueous solutions: applications to chlorpromazine and amitriptyline

The Analyst ◽  
1985 ◽  
Vol 110 (12) ◽  
pp. 1497 ◽  
Author(s):  
Theodore K. Christopoulos ◽  
Anastasia Mitsana-Papazoglou ◽  
Eleftherios P. Diamandis
Keyword(s):  
Aqueous Solutions ◽  
Ion Selective Electrodes ◽  
Organic Bases

Cu(II) Ion-Selective Electrodes Based on Cu(II) Complex with Cyclized Salophen

2003 ◽  
Vol 58 (7) ◽  
pp. 658-662 ◽  
Author(s):  
Manal R. Al-Saraj ◽  
Salman M. Saadeh ◽  
Monzir S. Abdel-Latif
Keyword(s):  
Aqueous Solutions ◽  
Ion Selective Electrodes ◽  
Similar Response ◽  
Membrane Composition ◽  
Experimental Conditions ◽  
Selectivity Coefficients ◽  
Potentiometric Selectivity ◽  
Coated Disc ◽  
Coated Wire

Several versions of Cu(II) ion selective electrodes (ISE), based on cyclized N,N'-bis(salicylidene)-o-phenylenediamine (salophen) complexes with Cu(II), were fabricated for determination of Cu(II) in aqueous solutions. The response of the ISE was optimized by variation of membrane composition and evaluation of various experimental conditions. Near Nernstian slopes (~ 28-32 mV/decade) were obtained for some preparations. The linear range of the ISE ranged from 5 × 10-5 to 1 × 10-2M Cu(II). Coated-wire and coated disc ISE resulted practically in a similar response as screen printed electrodes (SPE). The potentiometric selectivity coefficients (Kij) for all electrodes were determined for Na+, NH4+, Ca2+, Mg2+, Ni2+, Pb2+, Zn2+, Cd2+, Co2+, Fe3+, Hg2+, CO32-, H2PO4-, HPO42-, SO42-, CH3COO-, Br-, I-, NO3-, and SCN-. The selectivity coefficients were in the range from 10-2 to 10-3 for all ions tested except Hg2+, I-, and to less extent Fe3+. Fabricated ISE using the Cu(II)-salophen complex are reliable and stable.

Activity coefficients of DL-valine in aqueous solutions of KCl at 25�C. Measurement with ion selective electrodes and modelling

1996 ◽  
Vol 25 (9) ◽  
pp. 865-875 ◽  
Author(s):  
Mohammad K. Khoshkbarchi ◽  
Juan H. Vera
Keyword(s):  
Aqueous Solutions ◽  
Activity Coefficients ◽  
Ion Selective Electrodes

Determination of mean activity coefficients with ion-selective electrodes

1983 ◽  
Vol 55 (8) ◽  
pp. 1275-1280 ◽  
Author(s):  
Roger G. Bates ◽  
Andrew G. Dickson ◽  
Miklos. Gratzl ◽  
Andrea. Hrabeczy-Pall ◽  
Erno. Lindner ◽  
...  
Keyword(s):  
Activity Coefficients ◽  
Ion Selective Electrodes ◽  
Mean Activity Coefficients

Determination of activity coefficients of aqueous solutions of urea in the ultracentrifuge

1970 ◽  
Vol 23 (5) ◽  
pp. 915
Author(s):  
EF Woods
Keyword(s):  
Aqueous Solutions ◽  
Activity Coefficients ◽  
Similar Type ◽  
Point Of View ◽  
Published Data ◽  
Molecular Weights ◽  
Equilibrium Sedimentation ◽  
Aqueous Urea ◽  
Determination Of Activity

Apparent molecular weights of aqueous urea solutions have been determined by equilibrium sedimentation over the concentration range 1-9M. At the speeds used in the ultracentrifuge (39460 to 67770 r.p.m.) there was evidence of the effect of pressure on the sedimentation of urea. Apparent molecular weights of urea were therefore calculated at the solution-air meniscus where the solution is at l atm. The derived activity coefficients showed a similar type of oncentration dependence to published data for urea but there were significant quantitative differences. The significance of the results from the point of view of calculating theoretical distributions in the ultracentrifuge is discussed.

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