A novel fused-silica capillary dropping mercury electrode with long drop-time and its application on determination of critical micelle concentration

Součková, Jitka; Skopalová, Jana; Muller, L. L.; Vymětalíková, Michaela; Barták, Petr

doi:10.1016/j.talanta.2010.12.050

Cited by 6 publications

(3 citation statements)

References 39 publications

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“…Typical electrocapillary curves recorded in the potential range from −1.5 to 0.1 V are shown in Figure 2. The value of the electrocapillary maximum and the drop time reproducibility obtained with fused‐silica capillary DME was in accordance with the value obtained with the glass spindle capillary electrode as mentioned previously 9.…”

Section: Resultssupporting

confidence: 90%

“…All experiments were realized in a three‐electrode system with a saturated calomel reference electrode and an auxiliary platinum electrode. The fused‐silica capillary dropping mercury electrode proposed in our laboratory 9 and the glass spindle capillary dropping mercury electrode proposed by Novotný 7,8 were used as working electrodes. Electrocapillary measurements were carried out under the convective accumulation conditions 10, when the analyzed solution was intensively stirred during 2/3 of the drop life time.…”

Section: Methodsmentioning

confidence: 99%

“…One of the appropriate electrodes is the glass spindle capillary electrode designed by Novotný, which provides very stable and reproducible drops with life time in tens of seconds 7,8. Another possibility is the utilization of a homemade fused‐silica capillary DME (Figure 1) providing reproducible mercury drops with a life time ranging from 40 to 120 s. Its usability for the electrocapillary measurement and determination of critical micelle concentration is reported in a previous paper 9. The construction of both electrodes makes it possible to introduce the controlled convection drop time technique (CCDT) 10 which is suitable for the observation of the adsorption behavior of a surface active compound in its dilute solution under equilibrium conditions.…”

Section: Introductionmentioning

confidence: 99%

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Fused‐Silica Capillary Dropping Mercury Electrode for Electrocapillary Measurements

et al. 2012

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A homemade fused‐silica capillary dropping mercury electrode was used for the investigation of the adsorption behavior of a complex system by electrocapillary measurements. A mixture of soybean phospholipids, known as asolectin, was used for this purpose. The proposed setup with a fused‐silica capillary electrode enables to observe aggregation and adsorption of asolectin aggregates at the mercury electrode surface and to determine the concentrations corresponding to the formation of asolectin micelles (critical micelle concentration, CMC) and liposomes (critical liposome concentration, CLC). Values of CMC (196.2–39.0 mg L−1) and CLC (1360–350 mg L−1) were obtained from the dependence of drop time on the logarithm of asolectin concentration in phosphate buffer pH 7.0 within a concentration range from 1 to 50 mmol L−1.

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Section: Resultssupporting

confidence: 90%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fused‐Silica Capillary Dropping Mercury Electrode for Electrocapillary Measurements

et al. 2012

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Physicochemical and electrochemical methods for determination of critical micelle concentrations of surfactants: a comprehensive review

2022

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Understanding the formation of colloidal mercury in acidic wastewater with high concentration of chloride ions by electrocapillary curves

Wang

Qin

Chai

et al. 2013

Environ Sci Pollut Res

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Acidic wastewater with high concentration of chloride ions was generated from washing elemental mercury (Hg(0)) existed in the roast flue gas by water. This process was simulated by mercury drops entering the electrolytes with its composition changed according to the characteristics of acidic wastewater. Electrocapillary curves of different electrolytes were determined by dropping mercury electrode to explore the formation mechanism of colloidal mercury in acidic wastewater. The changes of zeta (ζ) potentials were also obtained. The results indicate that chloride ions have a great impact on the formation of colloidal mercury. Thermodynamic calculation demonstrated that the main mercury species in acidic wastewater were HgCl2 (aq), HgCl3 (-), and HgCl4 (2-). Moreover, the model of colloidal mercury structure in acidic wastewater was established. Based on the changes of Gibbs free energy for ions passing through stern layer and metallic bond theory, it can be inferred that HgCl4 (2-) was preferentially over-adsorbed on the mercury interface by the weak π chemical bond, and then positive charge ions such as heavy metal ions and H(+) were adsorbed due to the electrostatic force; thus, the colloidal mercury was formed.

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A novel fused-silica capillary dropping mercury electrode with long drop-time and its application on determination of critical micelle concentration

Cited by 6 publications

References 39 publications

Fused‐Silica Capillary Dropping Mercury Electrode for Electrocapillary Measurements

Fused‐Silica Capillary Dropping Mercury Electrode for Electrocapillary Measurements

Physicochemical and electrochemical methods for determination of critical micelle concentrations of surfactants: a comprehensive review

Understanding the formation of colloidal mercury in acidic wastewater with high concentration of chloride ions by electrocapillary curves

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