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KMID : 1059520090530010027
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Journal of the Korean Chemical Society
2009 Volume.53 No. 1 p.27 ~ p.33
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Determination of Cd(II) after Preconcentration onto Microcrystalline p-Dichlorobenzene Loaded with 2-Mercaptobenzothiazole
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Yoon Ju-Im
Choi Hee-Seon
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Abstract
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A sensitive technique for the determination of trace Cd(II) in various real samples after preconcentration onto microcrystalline p-dichlorobenzene loaded with 2-mercaptobenzothiazole was developed. Several experimental conditions such as the pH of the sample solution, the amount of chelating agent 2-mercaptobenzothiazole, the amount of adsorbent p-dichlorobenzene-2-MBT, and the flow rate of sample solution were optimized. The interfering effects of various concomitant ions were investigated. Cu(II) interfered with more seriously than any other ions. However, the interference by Cu(II) could be overcome sufficiently by adjusting tartrate ion concentration to be 0.01M or by controlling the amount of 2-mercaptobenzothiazole contained in 0.20 g p-dichlorobenzene to be 0.12 g. The dynamic range, the correlation coefficient (R2) and the detection limit obtained by this proposed technique were 0.5~30 ng mL-1, 0.9962, and 0.39 ng mL-1, respectively. Thus, good results were obtained by the use of p-dichlorobenze as adsorbent matrix. For validating this proposed technique, the aqueous samples(wastewater, stream water, and reservoir water) and the plastic sample were used. Recovery yields of 93~104 % were obtained. By F test, these measured data were not different from ICP-MS data at 95 % confidence level. Based on the results from the experiment, it was found that this proposed technique could be applied to the preconcentration and determination of Cd(II) in various real samples.
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KEYWORD
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Preconcentration, p-Dichlorobenzene, 2-Mercaptobenzothizole, Cd(II)
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