Article citationsMore>>
D. Hynek, L. Krejcova, J. Sochor, J. Natalia Cernei, J. Kynicky, V. Adam, L. Trnkova, J. Hubalek, R. Vrba and R. Kizek, “Study of Interactions between Cysteine and Cadmium(II) Ions using Automatic Pipetting System OffLine Coupled with Electrochemical Analyser,” International Journal of Electrochemical Science, Vol. 7, No. 3, 2012, pp. 1802-1819.
has been cited by the following article:
-
TITLE:
Electrochemical Study of Cadmium (II) Complexation with Cysteine
AUTHORS:
Sheriban Ramani, Biserka Raspor, Tahir Arbneshi
KEYWORDS:
Cysteine; Cadmium-Cysteinate Complex; Prepeak; Mass Balance Equations; Stoichiometric Stability Constants; Differential Pulse (DP) Excitation Mode
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.4 No.10,
October
11,
2013
ABSTRACT: The complexation of Cd with cysteine has been investigated
at pH ~9, and in constant ionic medium 0.59 M NaNO3 and borate buffer. Reduction signals of the hydrated Cd2+ and
Cd-cysteinate complex were resolved on the potential scale during amperometric
titration of 2 × 10-6 M Cd2+ with cysteine and cysteine with
Cd2+, in a differential pulse (DP) mode on HMDE. The 1:1 molar ratio
of Cd2+ to cysteine, and cysteine to Cd2+, was defined
for Cd-cysteinate complex formed under the defined conditions. The appearance
of the prepeak on the Cd-cysteinate reduction signal is showed, as the result
of cysteine adsorption in reduced form. From the mass balance equations, the
stoichiometric stability constants of Cd-cysteinate complex were calculated.
Under various experimental conditions, comparable log K values were obtained.
The grand average log K = 7.83 M-1 refers to 0.59 M ionic
strength and 23℃.