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  • EDTA titration  (5)
  • Springer  (5)
  • 1995-1999  (3)
  • 1990-1994  (2)
  • 1970-1974
  • 1965-1969
  • 1930-1934
Collection
Keywords
Publisher
  • Springer  (5)
Years
  • 1995-1999  (3)
  • 1990-1994  (2)
  • 1970-1974
  • 1965-1969
  • 1930-1934
Year
  • 1
    Electronic Resource
    Electronic Resource
    Selective complexometric determination of mercury using sodium nitrite as masking agent (1995)
    Springer
    Microchimica acta 118 (1995), S. 197-201 
    Details
    ISSN: 1436-5073
    Keywords: mercury determination ; EDTA titration ; complexometry ; masking ; sodium nitrite
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A complexo-titrimetric method for the determination of mercury(II) in the presence of other metal ions is described based on the selective masking ability of sodium nitrite. Mercury and other ions are initially complexed with an excess of EDTA and the surplus EDTA is titrated with Pb(NO3)2 solution at pH 5.0–6.0 using xylenol orange as indicator. An excess of solid NaNO2 is then added to decompose the Hg(II)-EDTA complex and the released EDTA is titrated with standard Pb(NO3)2 solution. Accurate results were obtained for 10–65 mg of mercury with relative errors 〈0.3% and standard deviations 〈 0.03 mg. Sn(IV) and Pd(II) interfere but can be easily masked. The method is applied for the determination of Hg(II) in its alloy compositions and complexes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01244359
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  • 2
    Electronic Resource
    Electronic Resource
    Complexometric determination of cadmium using 2-Mercaptoethanol as masking reagent (1998)
    Springer
    Microchimica acta 130 (1998), S. 103-104 
    Details
    ISSN: 1436-5073
    Keywords: cadmium determination ; complexometry ; masking ; 2-mercaptoethanol ; EDTA titration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A complexometric method for the determination of cadmium(II) in presence of other metal ions is described based on the selective masking ability of 2-mercaptoethanol towards cadmium(II). Cadmium and other ions in a given sample solution are initially complexed with excess of EDTA and the surplus EDTA is titrated with lead nitrate solution at pH 5.0–6.0 (hexamethylentetramine), using xylenol orange as indicator. A known excess of 2-mercaptoethanol solution (10% alcoholic) is then added, the mixture is shaken well and the released EDTA from the Cd-EDTA complex is titrated against standard lead nitrate solution. The interferences of various ions are studied and the method is applied to the determination of cadmium in its complexes. Reproducible and accurate results are obtained for 3.5–25mg of Cd with relative errors ≤ 0.65% and standard deviations ≤ 0.06 mg.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01254597
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  • 3
    Electronic Resource
    Electronic Resource
    Selective complexometric determination of mercury with sulphite as indirect masking reagent (1993)
    Springer
    Microchimica acta 111 (1993), S. 251-255 
    Details
    ISSN: 1436-5073
    Keywords: mercury determination ; EDTA titration ; complexometry ; masking ; sodium sulphite
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A complexo-titrimetric method for the determination of mercury(II) in the presence of other metal ions is described, based on the selective masking ability of sulphite ion towards Hg(II). Mercury in a given sample solution is initially complexed with a known excess of EDTA and the surplus EDTA titrated with zinc sulphate solution at pH 5.0–6.0 (hexamine), using xylenol orange (or methylthymol blue) as indicator. An excess of solid sodium sulphite is then added to decompose the Hg(II)-EDTA complex and the released EDTA is titrated with standard zinc sulphate solution. Reproducible and accurate results are obtained for 9.9–99 mg Hg with relative errors 〈 0.35% and standard deviations 〈 0.05 mg. The effects of various cations and anions are studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01245313
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  • 4
    Electronic Resource
    Electronic Resource
    Complexometric determination of copper(II) in ores, alloys and complexes using 2-mercaptoethanol as indirect masking reagent (1994)
    Springer
    Microchimica acta 117 (1994), S. 109-115 
    Details
    ISSN: 1436-5073
    Keywords: copper determination ; complexometry ; masking ; 2-mercaptoethanol ; EDTA titration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A complexo-titrimetric method for the determination of copper(II) in the presence of other metal ions is described, based on the selective masking ability of 2-mercaptoethanol towards copper(II). Copper and other ions in a given sample solution are initially complexed with an excess of EDTA and the surplus EDTA is titrated with zinc sulfate solution at pH 5.0–6.0 (hexamine), using xylenol orange as indicator. A known excess of 2-mercaptoethanol solution (10%) is then added, the mixture is shaken well and the released EDTA from the Cu-EDTA complex is titrated against standard zinc sulfate solution. The interferences of various ions are studied and the method is applied to the determination of copper in its ores, alloys and complexes. Reproducible and accurate results are obtained for 2.5–40 mg of Cu with relative errors ⩽ 0.4% and standard deviations ⩽ 0.04 mg.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01243021
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  • 5
    Electronic Resource
    Electronic Resource
    Indirect complexometric determination of palladium usingl-histidine as masking agent (1996)
    Springer
    Microchimica acta 124 (1996), S. 167-170 
    Details
    ISSN: 1436-5073
    Keywords: palladium determination ; complexometry ; EDTA titration ; masking ; l-histidine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract An indirect complexo-titrimetric method is described for the determination of palladium in the presence of other metal ions, L-histidine being used as the masking agent. Palladium(II) and other metal ions are initially complexed with an excess of EDTA and the surplus EDTA titrated with standard zinc sulfate solution at pH 4.5–5.5 using xylenol orange as indicator. An excess of 1 % L-histidine solution is then added, and the released EDTA is titrated with standard zinc sulfate solution. Accurate and reproducible results were obtained for 2–15 mg of Pd with relative errors ⩽0.4% and standard deviations 〈 0.02mg. Sn(IV) and Au(III) interfere, but can be easily masked. The method is successfully applied for the determination of palladium(II) in alloy compositions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01242812
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