The polarographic behavior of metal ions in molten LiNO3-KNO3 eutectic in presence of complexon III
Abstract
The possibility of using complexon III as a complexing substance in the polarography of salt metls (LiNO3-KNO3 eutectic) has been investigated. Complexon III was found to form complexes with Cd, Pb, Ni and Zn ions in the ratios 1:2 for Cd and Pb, 2:1 for Ni and 1:1 for Zn. Cadmium and lead complexes can be reduced at the DME with E1/2=-0.70 V for the cadmium complex and E1/2=-0.59 V for the lead complex (vs. a calomel reference electrode). Diffusion coefficients D=1.5×10-6 cm2 s-1 and D=2.5×10-6 cm2 s-1 were found for non-complexed cadmium and lead ions, respectively. Complexes of cadmium and lead with complexon III gave values of D=3.0×10-7 cm2 s-1 and D=3.7×10-7 cm2 s-1, respectively, at 170°C. The activation energy of the complexed and non-complexed Cd ion diffusion current Q=4.50 kcal mol-1 and the heterogenous electrode process rate constants ke0=2.5×10-6 cm s-1 for the complexed ion have been determined.
Keywords:
ions / metal ions / molten LiNO3-KNO3 eutectic / polarographySource:
Journal of Electroanalytical Chemistry, 1973, 41, 1, 119-125Publisher:
- Elsevier
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Institution/Community
IHTMTY - JOUR AU - Šušić, Milenko V. AU - Marković, D.A. AU - Hercigonja, N.N. PY - 1973 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/4716 AB - The possibility of using complexon III as a complexing substance in the polarography of salt metls (LiNO3-KNO3 eutectic) has been investigated. Complexon III was found to form complexes with Cd, Pb, Ni and Zn ions in the ratios 1:2 for Cd and Pb, 2:1 for Ni and 1:1 for Zn. Cadmium and lead complexes can be reduced at the DME with E1/2=-0.70 V for the cadmium complex and E1/2=-0.59 V for the lead complex (vs. a calomel reference electrode). Diffusion coefficients D=1.5×10-6 cm2 s-1 and D=2.5×10-6 cm2 s-1 were found for non-complexed cadmium and lead ions, respectively. Complexes of cadmium and lead with complexon III gave values of D=3.0×10-7 cm2 s-1 and D=3.7×10-7 cm2 s-1, respectively, at 170°C. The activation energy of the complexed and non-complexed Cd ion diffusion current Q=4.50 kcal mol-1 and the heterogenous electrode process rate constants ke0=2.5×10-6 cm s-1 for the complexed ion have been determined. PB - Elsevier T2 - Journal of Electroanalytical Chemistry T1 - The polarographic behavior of metal ions in molten LiNO3-KNO3 eutectic in presence of complexon III VL - 41 IS - 1 SP - 119 EP - 125 DO - 10.1016/S0022-0728(73)80036-1 ER -
@article{ author = "Šušić, Milenko V. and Marković, D.A. and Hercigonja, N.N.", year = "1973", abstract = "The possibility of using complexon III as a complexing substance in the polarography of salt metls (LiNO3-KNO3 eutectic) has been investigated. Complexon III was found to form complexes with Cd, Pb, Ni and Zn ions in the ratios 1:2 for Cd and Pb, 2:1 for Ni and 1:1 for Zn. Cadmium and lead complexes can be reduced at the DME with E1/2=-0.70 V for the cadmium complex and E1/2=-0.59 V for the lead complex (vs. a calomel reference electrode). Diffusion coefficients D=1.5×10-6 cm2 s-1 and D=2.5×10-6 cm2 s-1 were found for non-complexed cadmium and lead ions, respectively. Complexes of cadmium and lead with complexon III gave values of D=3.0×10-7 cm2 s-1 and D=3.7×10-7 cm2 s-1, respectively, at 170°C. The activation energy of the complexed and non-complexed Cd ion diffusion current Q=4.50 kcal mol-1 and the heterogenous electrode process rate constants ke0=2.5×10-6 cm s-1 for the complexed ion have been determined.", publisher = "Elsevier", journal = "Journal of Electroanalytical Chemistry", title = "The polarographic behavior of metal ions in molten LiNO3-KNO3 eutectic in presence of complexon III", volume = "41", number = "1", pages = "119-125", doi = "10.1016/S0022-0728(73)80036-1" }
Šušić, M. V., Marković, D.A.,& Hercigonja, N.N.. (1973). The polarographic behavior of metal ions in molten LiNO3-KNO3 eutectic in presence of complexon III. in Journal of Electroanalytical Chemistry Elsevier., 41(1), 119-125. https://doi.org/10.1016/S0022-0728(73)80036-1
Šušić MV, Marković D, Hercigonja N. The polarographic behavior of metal ions in molten LiNO3-KNO3 eutectic in presence of complexon III. in Journal of Electroanalytical Chemistry. 1973;41(1):119-125. doi:10.1016/S0022-0728(73)80036-1 .
Šušić, Milenko V., Marković, D.A., Hercigonja, N.N., "The polarographic behavior of metal ions in molten LiNO3-KNO3 eutectic in presence of complexon III" in Journal of Electroanalytical Chemistry, 41, no. 1 (1973):119-125, https://doi.org/10.1016/S0022-0728(73)80036-1 . .