Determination of the second ionization constant of 3,5-dinitrosalicylic acid (DNSH2) and the instability constant of [DNSFe]+ and titrimetric determination of thiourea with a 3,5-dinitrosalicylate-selective electrode

1986 ◽  
Vol 33 (1) ◽  
pp. 62-70 ◽  
Author(s):  
P.C. Gritzapis ◽  
E.P. Diamandis ◽  
T.P. Hadjiioannou
Keyword(s):  
Ionization Constant ◽  
Selective Electrode ◽  
Instability Constant ◽  
Titrimetric Determination

Titrimetric determination of cobalt, nickel and lanthanoids in alloys for novel permanent magnets using ion selective electrodes

1981 ◽  
Vol 46 (4) ◽  
pp. 982-986
Author(s):  
Dagmar Kalavská ◽  
Adam Košturiak ◽  
Svetozár Kalavský
Keyword(s):  
Permanent Magnets ◽  
Copper Ion ◽  
Ion Selective Electrode ◽  
Selective Electrode ◽  
Fluoride Ions ◽  
Cobalt Nickel ◽  
Back Titration ◽  
Titrimetric Determination ◽  
Fluoride Ion Selective Electrode

A procedure of chelatometric determination of cobalt, nickel and lanthanoids based on back titration with Cu(II) ions using copper ion selective electrode has been developed and applied to alloys for novel type permanent magnets. In addition, a method has been worked out for direct titrimetric determination of lanthanoids with solution of fluoride ions in 75% ethanol using fluoride ion selective electrode.

Titrimetric determination of some analytically significant organic reagents using a Cd2+-selective electrode crytur

1979 ◽  
Vol 44 (4) ◽  
pp. 1126-1133 ◽  
Author(s):  
Karel Vytřas ◽  
Marie Novotná-Horčicová
Keyword(s):  
Analytical Methods ◽  
Nitrate Solution ◽  
Cadmium Nitrate ◽  
Selective Electrode ◽  
Organic Reagents ◽  
Titrimetric Determination

A Cd2+ selective electrode Crytur 48-17 proved to serve well for the titrimetric determination of some types of organic reagents, particularly of 8-hydroxyquinoline and its derivatives, sodium N,N-diethyldithiocarbaminate, pyridylazo dyes (PAN, PAR), and aminocarboxylic acids (NTA, EDTA, DCTA) with 0.01M cadmium nitrate solution in the medium of ammoniacal or borate buffers. The titrimetric determinations examined can be classified as precise analytical methods.

Titration of sulphates and lead using lead ion selective electrode

1981 ◽  
Vol 46 (2) ◽  
pp. 368-376 ◽  
Author(s):  
Josef Veselý
Keyword(s):  
Ionic Strength ◽  
Electrode Surface ◽  
Salt Content ◽  
Ion Selective Electrode ◽  
Lead Ion ◽  
Selective Electrode ◽  
Limit Of Determination ◽  
Total Salt Content ◽  
Automatic Titration

Titration of sulphates with lead perchlorate employing lead ion selective electrode indication was studied using additions of various organic solvents at different pH' and ionic strength values. As the optimum emerged systems with 60-70% 1,4-dioxane, pH' 5.3-5.6. After dehydration with sodium hydroxide, dioxane must be freed from the electrode surface-oxidizing impurities by their reduction with sodium metal and subsequent distillation. The method was applied to determination of sulphates in mountain spring waters. Units of ppm can be determined; the limit of determination, however, depends considerably on the content of dioxane, total salt content in the sample, and speed of the semi-automatic titration. Lead can be determined with EDTA in concentrations down to c(Pb2+) = 5 . 10-6 mol l-1.

Sign in / Sign up

Export Citation Format

Share Document