Titrimetric determination of trace sulfur in petroleum using a lead ion selective electrode

1972 ◽  
Vol 60 (2) ◽  
pp. 212-216 ◽  
Author(s):  
R. N. Heistand ◽  
C. T. Blake
Keyword(s):  
Ion Selective Electrode ◽  
Lead Ion ◽  
Selective Electrode ◽  
Titrimetric Determination

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.

Determination of Vitamin Bi in Pharmaceutical Preparations Using a Lead Ion Selective Electrode and Atomic Absorption Spectroscopy

1979 ◽  
Vol 62 (2) ◽  
pp. 315-319
Author(s):  
Saad S M Hassan ◽  
Mohamed T Zaki ◽  
Mohamed H Eldesouki
Keyword(s):  
Standard Deviation ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Pharmaceutical Preparations ◽  
Ion Selective Electrode ◽  
Lead Ion ◽  
Fluorometric Method ◽  
Selective Electrode

Abstract Simple, rapid, and accurate methods have been developed for determining vitamin Bx in pharmaceutical preparations without prior separation of the vitamin. The methods are based on the desulfurization reaction with potassium plumbite and measurement of the unreacted lead (II) ions at 217 nm using atomic absorption spectroscopy (AAS), or by titration with EDTA at pH 4.5 with the lead ion selective electrode and Gran's plot. The results compare favorably with those obtained using the USP fluorometric method. Recoveries of pure vitamin Bx averaged 99.1%, with a standard deviation of 0.8%, and 99.0%, with a standard deviation of 0.7%, for the AAS and ion selective electrode procedures, respectively.

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.

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