(2017) The Mesoporous Porphyrinic Zirconium Metal-Organic Framework for Pipette-Tip Solid-Phase Extraction of Mercury from Fish Samples Followed by Cold Vapor Atomic Absorption Spectrometric Determination. Food Analytical Methods. pp. 2175-2184. ISSN 1936-9751
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Abstract
In this study, the highly stable mesoporous porphyrinic zirconium metal-organic framework, namely PCN-222/MOF-545 (Zr-MOF), was prepared and used for pipette-tip solid-phase extraction of Hg(II). As a high-capacity sorbent, 4 mg of the Zr-MOF was placed into a conventional pipette tip and used, for the first time, for the fast extraction and preconcentration of mercury ions. For desorption, 50 mu L of 10 HCl was used by 15 repeated aspirating/dispensing cycles, and Hg ions in elusion were measured by a cold vapor atomic absorption spectrometer. Affecting parameters on extraction efficiency were studied, and optimum conditions were established as amount of sorbent 2 mg, pH was adjusted to 5.0, the eluting volume was 15 mu L, and extraction was performed on 1.8 mL of the sample. The optimal number of aspirating/dispensing cycles for extraction and desorption of analytes was found to be 10 and 15 cycles, respectively. The limit of detection of the method was found to be 20 ng L-1 with a relative standard deviation of ae<currency>3.1 (for seven replicate analyses of 20 mu g L-1 of mercury). Adsorption capacity and enrichment factor were 35.5 mg g(-1) and 120-fold, respectively. The proposed method was successfully applied for the determination of Hg(II) ions in fish samples.
Item Type: | Article |
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Keywords: | solid-phase extraction mesoporous mof porphyrin zirconium metal organic framework (pcn-222/mof-545) pipette-tip extraction fish analysis environmental-samples trace mercury human plasma catalyst removal preconcentration sorbent water acid |
Divisions: | |
Page Range: | pp. 2175-2184 |
Journal or Publication Title: | Food Analytical Methods |
Volume: | 10 |
Number: | 7 |
Identification Number: | 10.1007/s12161-016-0786-x |
ISSN: | 1936-9751 |
Depositing User: | مهندس مهدی شریفی |
URI: | http://eprints.zbmu.ac.ir/id/eprint/2378 |
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