Magnetic Dispersive Solid Phase Extraction Using Recycled-graphite for GO-Fe3O4-dithizone Composite Combined with FAAS for Determination of Lead in Environmental Samples

Magnetic dispersive solid phase extraction (MdSPE) was developed to determine the concentration of lead (Pb) in real water samples, while graphene oxide-magnetite-dithizone (GO-Fe3O4-DTZ) from the used graphite tubes (recycled graphite) of electrothermal technique was simply employed as a new sorben...

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Bibliographic Details
Published in:Analytical Sciences 2021/07/10, Vol.37(7), pp.1015-1021
Main Authors: CHAIKHAN, Pilaipan, UDNAN, Yuthapong, AMPIAH-BONNEY, Richmond J., CHAIYASITH, Wipharat CHUACHUAD
Format: Article
Language:English
Subjects:
Analytical Chemistry
Chemistry
Dispersion
dithizone
flame atomic absorption spectrometry
Fourier transforms
Functional groups
Graphene
graphene oxide
Graphite
Infrared spectrophotometers
Iron oxides
Lead
Magnetic dispersive solid phase extraction
Magnetic fields
Magnetite
Morphology
Original Paper
Quantitation
Scanning electron microscopy
Solid phases
Sorbents
Surface properties
Tubes
Water analysis
Water sampling
Zeta potential
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Summary:Magnetic dispersive solid phase extraction (MdSPE) was developed to determine the concentration of lead (Pb) in real water samples, while graphene oxide-magnetite-dithizone (GO-Fe3O4-DTZ) from the used graphite tubes (recycled graphite) of electrothermal technique was simply employed as a new sorbent to improve extraction efficiency, separated by external magnetic field and analyzed with FAAS. The synthesized sorbent was evaluated for its surface property, functional group and surface morphology by Zeta potential, Fourier transform infrared spectrophotometer (FTIR), and scanning electron microscope (SEM), respectively. The relevant measurement parameters, such as pH, extraction time, type and concentration of eluent, sample volume and reusability, were optimized. Under the optimal conditions, preconcentration factor was 13.33. The limit of detection (LOD) and limit of quantitation (LOQ) obtained were 0.070 and 0.23 mg/L, respectively. The relative standard deviation (%RSD) was 3.41%. Recovery values were 90.1 – 123%. In addition, the robustness of the method was affirmed in terms of tolerance limit obtained from interference studies.
ISSN:0910-6340
1348-2246
DOI:10.2116/analsci.20P383