E. Casassas, C. Ariño, M. Esteban
Jun 1, 1990
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Journal
Analytical Letters
Abstract
Abstract The behaviour of DL-N-acetylhomocysteine thiolactone (citiolone) at a hanging mercury drop electrode is studied by cathodic stripping voltammetry (c.s.v.) as an example for determination of thiolactones. Voltammetric response is only obtained at pH> 9.3, when the cyclic structure of thiolactone is open. A spectrometric study is made in order to ascertain this behaviour. Under the recommended conditions and at pH> 9.3, the sulfur containing group can form mercury complexes and citiolone can be determined from the stripping peak that appears at about -0.470 V within the concentration range 3.5 10−7- 1 10−9 mol l−1. Calibration functions are reported and detection limits calculated. The interference of several organic compounds is reported.