Novel magnetic SPE method based on carbon nanotubes filled with cobalt ferrite for the analysis of organochlorine pesticides in honey and tea

2013 ◽  
Vol 36 (20) ◽  
pp. 3387-3394 ◽  
Author(s):  
Zhuo Du ◽  
Miao Liu ◽  
Gongke Li
Keyword(s):  
Carbon Nanotubes ◽  
Organochlorine Pesticides ◽  
Cobalt Ferrite ◽  
Magnetic Spe ◽  
Spe Method

Application of Magnetic Nanoparticles to Residue Analysis of Organochlorine Pesticides in Water Samples by GC/MS

2012 ◽  
Vol 95 (5) ◽  
pp. 1343-1349 ◽  
Author(s):  
Senar Ozcan ◽  
Ali Tor ◽  
Mehmet Emin Aydin
Keyword(s):  
Oleic Acid ◽  
Magnetic Nanoparticles ◽  
Ionic Strength ◽  
Organochlorine Pesticides ◽  
Water Samples ◽  
Residue Analysis ◽  
Environmental Water ◽  
Magnetic Spe ◽  
Spe Method ◽  
Fe3o4 Mnps

Abstract This paper describes a novel magnetic-SPE method for the determination of organochlorine pesticides (OCPs) in environmental water samples by use of Fe3O4-magnetic nanoparticles (MNPs) coated with oleic acid followed by GC/MS. The chemisorption of oleic acid onto Fe3O4-MNPs provides reusability of the developed sorbent materials several times. The effects of different parameters such as pH, desorption solvent, contact time, temperature, ionic strength, and sorbent dosage on the efficiency of magnetic-SPE were investigated. The optimized SPE method involved shaking 50 mL of water sample (pH 4) with 50 mg oleic acid coated Fe3O4-MNPs for 1 h, isolating the sorbent with an Nd-Fe-B magnet, and eluting the OCPs with methanol. An ionic strength of 0.1 M and temperature of 15°C provided the maximum extraction efficiency. The LOQs were in the range of 0.006 to 0.048 μg/L. For three fortification levels, recoveries were in the range of 44–108%, with RSD <5%. The developed SPE method was successfully applied to real water samples, and it is viable, rapid, and easy to use for analysis of OCPs in water samples.

Removal of uranium(VI) ions from aqueous solution by magnetic cobalt ferrite/multiwalled carbon nanotubes composites

2015 ◽  
Vol 273 ◽  
pp. 307-315 ◽  
Author(s):  
Lichao Tan ◽  
Qi Liu ◽  
Xiaoyan Jing ◽  
Jingyuan Liu ◽  
Dalei Song ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solution ◽  
Multiwalled Carbon Nanotubes ◽  
Cobalt Ferrite ◽  
Multiwalled Carbon

Magnetic solid-phase extraction combined with in situ slurry cold vapor generation atomic fluorescence spectrometry for preconcentration and determination of ultratrace mercury

2014 ◽  
Vol 6 (9) ◽  
pp. 2876-2882 ◽  
Author(s):  
Wang-bing Zhang ◽  
Chu-xiao Sun ◽  
Xin-an Yang
Keyword(s):  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Atomic Fluorescence Spectrometry ◽  
Atomic Fluorescence ◽  
Cold Vapor Generation ◽  
Magnetic Solid ◽  
Magnetic Spe ◽  
Spe Method

A magnetic SPE method combined with CVG-AFS for the determination of Hg2+is established.

Remediation of organochlorine pesticides contaminated lake sediment using activated carbon and carbon nanotubes

Chemosphere ◽  
2017 ◽  
Vol 177 ◽  
pp. 65-76 ◽  
Author(s):  
Shan Hua ◽  
Ji-Lai Gong ◽  
Guang-Ming Zeng ◽  
Fu-Bing Yao ◽  
Min Guo ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Activated Carbon ◽  
Organochlorine Pesticides ◽  
Lake Sediment
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