Preconcentration and trace determination of copper (II) in Thai food recipes using Fe3O4@Chi-GQDs nanocomposites as a new magnetic adsorbent

被引：65

作者：

Limchoowong, Nunticha ^{[1
,2
]}

Sricharoen, Phitchan ^{[1
,2
]}

Areerob, Yonrapach ^{[1
,2
]}

Nuengmatcha, Prawit ^{[1
,2
,3
]}

Sripakdee, Thitiya ^{[1
,2
,4
]}

Techawongtien, Suchila ^{[5
]}

Chanthai, Saksit ^{[1
,2
]}

机构：

[1] Khon Kaen Univ, Fac Sci, Mat Chem Res Ctr, Dept Chem, Khon Kaen 40002, Thailand

[2] Khon Kaen Univ, Fac Sci, Ctr Excellence Innovat Chem, Khon Kaen 40002, Thailand

[3] Nakhon Si Thammarat Rajabhat Univ, Fac Sci & Technol, Dept Chem, Nakhon Si Thammarat 80280, Thailand

[4] Sakon Nakhon Rajabhat Univ, Fac Sci & Technol, Chem Program, Sakon Nakhon 47000, Thailand

[5] Khon Kaen Univ, Fac Agr, Dept Plant Sci & Agr Resources, Khon Kaen 40002, Thailand

来源：

FOOD CHEMISTRY | 2017年 / 230卷

关键词：

Chitosan-graphene quantum dots; Magnetic nanocomposite; Copper; Food recipes; LIQUID-LIQUID MICROEXTRACTION; SOLID-PHASE EXTRACTION; GRAPHENE QUANTUM DOTS; MALACHITE GREEN; CHITOSAN; LEAD; NANOPARTICLES; ADSORPTION; REMOVAL; PARTICLES;

D O I：

10.1016/j.foodchem.2017.03.066

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

This study describes the preparation, characterization, and application of a new magnetic chitosan-graphene quantum dots (Fe3O4@Chi-GQDs) nanocomposite as an adsorbent for the preconcentration of Cu (II) in Thai food recipes or the so-called "Som Tam" (green papaya salad) prior to determination by inductively coupled plasma-optical emission spectrometry. The spectroscopic and magnetic properties along with the morphology and thermal property were analyzed using FTIR, EDX, XRD, TGA, VSM, and TEM. Preconcentration optimizations including pH, dosage of adsorbent, adsorption-desorption time, concentration and volume of elution solvent, sample volume and enrichment factor, and reusing time were investigated. Good linearity was obtained ranging from 0.05 to 1500 mu g L-1 with correlation coefficient of 0.999. Limit of detection was 0.015 mu g L-1. Relative recoveries of 85.4-107.5% were satisfactorily obtained. This Fe3O4@Chi-GQDs has high potential to be used as preconcentration method and can be reused 7 times with high extraction efficiency. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：388 / 397

页数：10

共 34 条

[1] Using of activated carbon produced from spent tea leaves for the removal of malachite green from aqueous solution [J].