Preparation of Indium Oxide Functionalized Multiwalled Carbon Nanotube Adsorbent for Detection of Preservatives in Food Samples
10.11895/j.issn.0253-3820.171039
- VernacularTitle:纳米氧化铟改性的碳纳米管吸附剂的制备及其在食品防腐剂检测中的应用
- Author:
Wei HUANG
1
;
Yue HU
;
Yu-Kui TONG
;
Qin-Fei XIA
;
Li-Jie WANG
;
Miao-Miao TIAN
Author Information
1. 黑龙江省光化学生物材料与储能材料重点实验室
- Keywords:
Indium oxide nanoparticles;
Multiwalled carbon nanotubes;
Adsorbent;
Food preservative
- From:
Chinese Journal of Analytical Chemistry
2018;46(2):239-245
- CountryChina
- Language:Chinese
-
Abstract:
In2O3nanoparticles-modified multiwalled carbon nanotubes (In2O3-MWCNTs) were successfully prepared as solid phase extraciton (SPE) adsorbent for the determination of three food preservatives(benzoic acid,sorbic acid,and methylparaben) in beverage samples coupled with high performance liquid chromatography (HPLC).Because of the large surface area and amount of hydroxyl groups on the surface of In2O3nanoparticles,In2O3nanoparticles could interact with specific functional groups.In2O3-MWCNTs adsorbent was prepared based on the large surface area of In2O3and superior thermal and chemical stability of MWCNTs.The obtained adsorbent was characterized via transmission electron microscope (TEM),thermogravimetric analysis (TGA),and Fourier transform-infrared (FT-IR) spectroscopy.Several experimental parameters affecting the extraction efficiency were investigated by single-factor experiments,such as adsorbents amount,sample volume,eluent volume,sample pH,and eluent type.The first four factors were then further evaluated by means of a Taguchi's L16(44) orthogonal array experimental design.According to the results of orthogonal array experiment,the optimal conditions were chosen as follows: 0.15 g of adsorbent amount,5.0 mL of sample volume,0.6 mL of ACN-H2O (60:40,0.1% formic acid,V/V) as eluent,and sample pH 4.0.Under the optimum conditions,the LODs (S/N=3) and LOQs (S/N=10) for three preservatives were in the range of 0.004-0.012 μg/mL and 0.012-0.038 μg/mL,respectively.The recoveries ranged from 70.2% to 109.4%.The method is rapid,sensitive,and suitable for the determination of preservatives in food samples.
