• 安全检测 •

### 磁性氧化石墨烯的制备及用于乳制品中邻苯二甲酸酯类塑化剂的测定

1. （邢台学院化学与化工学院，河北 邢台 054001）
• 出版日期:2020-05-25 发布日期:2020-05-15
• 基金资助:
河北省自然科学基金项目（E2018108011）

### Synthesis of Magnetic Graphene Oxide and Its Application in Determination of Phthalate Ester Plasticizers in Dairy Products

YU Ling, XING Cuijuan, HE Xu, DONG Lili, ZHAO Zhe, SHEN Wenlong, BIAN Xiaoqiao

1. (College of Chemistry and Chemical Engineering, Xingtai College, Xingtai 054001, China)
• Online:2020-05-25 Published:2020-05-15

Abstract: Magnetic graphene oxide (Fe3O4/GO) was successfully prepared from graphite powder and characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and Raman spectroscopy (RS). Fe3O4/GO was used as a new purifying agent to improve the traditional method of quick, easy, cheap, effective, rugged, and safe (QuEChERS) for the pretreatment of dairy samples because of its strong adsorption capacity and magnetism. Using the improved pretreatment procedure combined with gas chromatography-mass spectrometry (GC-MS), 16 phthalate esters (PAEs) were analyzed. The optimum pretreatment conditions were determined by optimizing the type of extraction agent and the amount of purifying agent. The results showed that the calibration curves for all PAEs had a good linearity in the concentration range of 20–1 000 μg/L with correlation coefficients (R) ≥ 0.998 4. The lowest limits of detection were between 0.5 and 2.5 μg/kg. The average recoveries ranged from 85.7% to 117.7% at spiked concentration levels of 50, 100 and 200 μg/kg, with relative standard deviation (RSD) not exceeding 7.6%. Two milliliters of organic solvent and 155 mg of adsorbent were required for treatment of 1 g sample, which took about 8 min. The method only needs simple pretreatment and has good impurity removal effects and is suitable for the analysis of PAEs in dairy products.