SVIBOR - Papers - project code: 1-07-025

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Published papers on project 1-07-025


Quoted papers: 12
Other papers: 4
Total: 16


  1. Type of paper: Paper in proceedings

    Title: Flow Injection Determination of Thiourea in Acidic Solution Using Flow-through Electrode with AgI-based Tubular Membrane

    Authors:
    Komljenović, Josipa (119831)
    Radić, Njegomir (39595)
    Editors
    Di Natale, Corrado
    D'Amico, Arnaldo
    Proceedings title: The Fifth International Meeting on Chemical Sensors
    Language: engleski
    Place: Rim, Italija
    Year: 1994
    Pages: from 395 to 398
    Meeting: The Fifth International Meeting on Chemical Sensors
    Held: from 07/11/94 to 07/14/94
    Summary: A multi-purpose solid-state iodide-selective electrode was constructed as a compact tubular sensor wich has dimensions of the sensing hole: 2,0 mm i.d. and 1,2 mm length. The behaviour, suitability and incorporation of the tubular electrode into the conduit of a flow-injection system have been described. Application of the tubular electrode is exemplified by the determination of thiourea in 0,1 M HClO4 as supporting electrolyte by using of a flow-injection system. The rectilinear calibration graph was obtained by plotting the peak hight versus concentration of thiourea. The detection limit was 0,02 mM under optimized flow conditions (Flow-rate: 1,2 mL/min; V-sample: 0,2 mL; 5ž10-5 M silver ions carrier stream).
    Keywords: Flow-injection analysis, membrane electrode, thiourea

  2. Type of paper: Summary in proceedings

    Title: Kinetics-potentiometric determination of iron(III) in acidic solution using a fluoride ion-selective electrode

    Authors:
    Radić, Njegomir (39595)
    Komljenović, Josipa (119831)
    Editors
    Hraste, Marin
    Proceedings title: XII. SASTANAK KEMIČARA HRVATSKE - SINOPSISI
    Language: hrvatski
    Place: Zagreb
    Year: 1991
    ISBN/ISSN: -
    Pages: from 178 to 178
    Meeting: XII. SASTANK KEMIČARA HRVATSKE
    Held: from 02/11/91 to 02/13/91
    Summary: In this work kinetics potentiometric method of determinationof iron(III), based on the iron(III)-monofluoride complexformation reaction in acidic solution (pH=2.0) is described. Theinitial rates of iron-fluoride complex formation in the solution,calculated from the non-steady-state potential values recordedafter addition of Fe(III), were shown to be proportional to theanalytical concentration of this ion in solution. The describedprocedure can be successfuly applied for the determination offree Fe(III) or labile Fe(III) (as the fluoride may displaceweaker ligands) in the range of iron quantity from 0.001 to 0.020mmol.
    Keywords: Iron(III), kinetics-potentiometric determination, fluoride ion-selective electrode

  3. Type of paper: Summary in proceedings

    Title: Potentiometric determination of aluminium in 2-propanol + water mixtures using fluoride ion-selective electrode

    Authors:
    Papa, Miljenko
    Radić, Njegomir (39595)
    Editors
    Trinajstić, Nenad
    Proceedings title: XIII. SKUP HRVATSKIH KEMIČARA - SINOPSISI
    Language: hrvatski
    Place: Zagreb
    Year: 1993
    Pages: from 214 to 214
    Meeting: XIII. SKUP HRVATSKIH KEMIČARA
    Held: from 02/08/93 to 02/10/93
    Summary: In this work potentiometric determination of aluminium inmixtures 2-propanol + water by using fluoride ion-selectiveelectrode has been examined. Based on the experimental values (E,pH) recorded during a titration course the overall formationconstant of Al(III)-heksafluorid complex has been calculated. Itwas observed tha the value of formation constant increases byincreasing vol % of organic solvent in solution. The proposedmethod can be successfuly applied for the determination ofaluminium in the cell solution when its concetration is >0.01mmol/L.
    Keywords: Aluminium(III), potentiometric determination, 2-propanol + water mixtures, fluoride ion-selective electrode

  4. Type of paper: Summary in proceedings

    Title: Flow-injection determination of cysteine using a potentiometric tubular sensor with AgI-based membrane

    Authors:
    Komljenović, Josipa (119831)
    Radić, Njegomir (39595)
    Editors
    Janović, Zvonimir
    Proceedings title: XIV skup hrvatskih kemičara-Sinopsisi
    Language: hrvatski
    Place: Zagreb
    Year: 1995
    Pages: from 283 to 283
    Meeting: XIV Skup hrvatskih kemičara
    Held: from 02/06/95 to 02/08/95
    Summary: A multi-purpose flow-through sensor with, AgI-based selective membrane is constructed. The membrane was prepared by pressing mixture of silver salts (AgI + Ag2S) and PTFE powder. The sensing hole of sensor has 2,0 mm i.d. and 1,2 mm length. The behaviour sutability and incorporation of the tubular electrode into the conduit of a flow-injection system are described. Application of the tubular electrode is exemplified by the determination of cysteine in 0,1 M HClO4 as supporting electrolyte by using of a flow-injection system. A rectilinear calibration graph is obtained by plotting the peak height versus concentration of cysteine. The described method provides determination of cysteine in the concentration range from 1ž10-4 to 1ž10-1 mol/L, under optimized flow conditions (Flow-rate: 2,5 mL/min; V-sample: 0,2 mL; ŠAg+Ć = 5ž10-5 mol/L).
    Keywords: flow-injection analysis, membrane electrode, cysteine


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