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Publication
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| Title of Article |
Fe3O4/hydroxyapatite/graphene quantum dots as a novel nano-sorbent
for preconcentration of copper residue in Thai food ingredients:
Optimization of ultrasound-assisted magnetic solid phase extraction |
| Date of Acceptance |
28 December 2017 |
| Journal |
| Title of Journal |
Ultrasonics Sonochemistry |
| Standard |
ISI |
| Institute of Journal |
elsevier |
| ISBN/ISSN |
1350-4177 |
| Volume |
2017 |
| Issue |
37 |
| Month |
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| Year of Publication |
2017 |
| Page |
83-93 |
| Abstract |
Fe3O4/hydroxyapatite/graphene quantum dots (Fe3O4/HAP/GQDs) nanocomposite was synthesized and
used as a novel magnetic adsorbent. This nanocomposite was characterized using scanning electron
microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction,
energy dispersive X-ray spectroscopy, and magnetization property. The Fe3O4/HAP/GQDs was
applied to pre-concentrate copper residues in Thai food ingredients (so-called ‘‘Tom Yum Kung”) prior
to determination by inductively coupled plasma-atomic emission spectrometry. Based on ultrasoundassisted
extraction optimization, various parameters affecting the magnetic solid-phase extraction, such
as solution pH, amount of magnetic nanoparticles, adsorption and desorption time, and type of elution
solvent and its concentration were evaluated. Under optimal conditions, the linear range was 0.05–
1500 ng mL1 (R2 > 0.999), limit of detection was 0.58 ng mL1, and limit of quantification was
1.94 ng mL1. The precision, expressed as the relative standard deviation of the calibration curve slope
(n = 5), for intra-day and inter-day analyses was 0.87% and 4.47%, respectively. The recovery study of
Cu for real samples was ranged between 83.5% and 104.8%. This approach gave the enrichment factor
of 39.2, which guarantees trace analysis of Cu residues. Therefore, Fe3O4/HAP/GQDs can be a potential
and suitable candidate for the pre-concentration and separation of Cu from food samples. It can easily
be reused after treatment with deionized water. |
| Keyword |
Ultrasound-assisted extraction, Magnetic solid-phase extraction, Copper, Hydroxyapatite, Graphene quantum dots, Nanocomposite |
| Author |
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| Reviewing Status |
มีผู้ประเมินอิสระ |
| Status |
ตีพิมพ์แล้ว |
| Level of Publication |
นานาชาติ |
| citation |
true |
| Part of thesis |
true |
| Attach file |
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| Citation |
0
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Journal Publication
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