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The study of a new method to determine copper ion by square-wave voltammetry-extraction iodometry at the liquid/liquid interfaces.

Shi C, Xie S, Jia J - J Autom Methods Manag Chem (2008)

Bottom Line: A new method of indirect determination of Cu(2+) was developed based on square-wave voltammetry by the oxidation of iodide in organic solvent at the liquid/liquid (L/L) interface.The limit of detection for the determination of Cu(2+) in this method was found to be 5 x 10(-4) mol/L, and the concentration ranged up to 1 x 10(-2) mol/L gave a linear limiting current versus concentration response.For the same simulated wastewater, this method showed high accuracy compared with the result tested by sodium diethyldithiocarbamate extraction spectrophotometry.

View Article: PubMed Central - PubMed

Affiliation: School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.

ABSTRACT
A new method of indirect determination of Cu(2+) was developed based on square-wave voltammetry by the oxidation of iodide in organic solvent at the liquid/liquid (L/L) interface. The limit of detection for the determination of Cu(2+) in this method was found to be 5 x 10(-4) mol/L, and the concentration ranged up to 1 x 10(-2) mol/L gave a linear limiting current versus concentration response. For the same simulated wastewater, this method showed high accuracy compared with the result tested by sodium diethyldithiocarbamate extraction spectrophotometry. This approach could be applied to the indirect determination of the oxidative heavy metals in the industrial wastewater.

No MeSH data available.


(a) Square-wave voltammograms of variousiodine concentrations in MIBK: amplitude 0.15 V and frequency 10 Hz, (b) the peak current versus concentrationof iodine in solution: the iodine concentrations (in mol/L): 0.0049, 0.0040,0.0030, 0.0020, 0.0012, 0.00062, 0.00040, 0.00031.
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fig3: (a) Square-wave voltammograms of variousiodine concentrations in MIBK: amplitude 0.15 V and frequency 10 Hz, (b) the peak current versus concentrationof iodine in solution: the iodine concentrations (in mol/L): 0.0049, 0.0040,0.0030, 0.0020, 0.0012, 0.00062, 0.00040, 0.00031.

Mentions: The square-wave voltammograms (SWVs) of variousconcentrations of iodine in the triiodide stock aqueous solution chosen aboveare shown in Figure 3(a). The mechanism of iodine oxidation at the electrodesurface can be explained as inliterature 16. The peak current was directly proportional to I2 concentration as shown in Figure 3(b). The proportionality coefficient was0.9970. So it is reasonable to suggest that the indirectly quantitativedetermination of Cu2+ is feasible.


The study of a new method to determine copper ion by square-wave voltammetry-extraction iodometry at the liquid/liquid interfaces.

Shi C, Xie S, Jia J - J Autom Methods Manag Chem (2008)

(a) Square-wave voltammograms of variousiodine concentrations in MIBK: amplitude 0.15 V and frequency 10 Hz, (b) the peak current versus concentrationof iodine in solution: the iodine concentrations (in mol/L): 0.0049, 0.0040,0.0030, 0.0020, 0.0012, 0.00062, 0.00040, 0.00031.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2602827&req=5

fig3: (a) Square-wave voltammograms of variousiodine concentrations in MIBK: amplitude 0.15 V and frequency 10 Hz, (b) the peak current versus concentrationof iodine in solution: the iodine concentrations (in mol/L): 0.0049, 0.0040,0.0030, 0.0020, 0.0012, 0.00062, 0.00040, 0.00031.
Mentions: The square-wave voltammograms (SWVs) of variousconcentrations of iodine in the triiodide stock aqueous solution chosen aboveare shown in Figure 3(a). The mechanism of iodine oxidation at the electrodesurface can be explained as inliterature 16. The peak current was directly proportional to I2 concentration as shown in Figure 3(b). The proportionality coefficient was0.9970. So it is reasonable to suggest that the indirectly quantitativedetermination of Cu2+ is feasible.

Bottom Line: A new method of indirect determination of Cu(2+) was developed based on square-wave voltammetry by the oxidation of iodide in organic solvent at the liquid/liquid (L/L) interface.The limit of detection for the determination of Cu(2+) in this method was found to be 5 x 10(-4) mol/L, and the concentration ranged up to 1 x 10(-2) mol/L gave a linear limiting current versus concentration response.For the same simulated wastewater, this method showed high accuracy compared with the result tested by sodium diethyldithiocarbamate extraction spectrophotometry.

View Article: PubMed Central - PubMed

Affiliation: School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.

ABSTRACT
A new method of indirect determination of Cu(2+) was developed based on square-wave voltammetry by the oxidation of iodide in organic solvent at the liquid/liquid (L/L) interface. The limit of detection for the determination of Cu(2+) in this method was found to be 5 x 10(-4) mol/L, and the concentration ranged up to 1 x 10(-2) mol/L gave a linear limiting current versus concentration response. For the same simulated wastewater, this method showed high accuracy compared with the result tested by sodium diethyldithiocarbamate extraction spectrophotometry. This approach could be applied to the indirect determination of the oxidative heavy metals in the industrial wastewater.

No MeSH data available.