Davari Seyedeh Dorsa, Rabbani Mohammad, Basti Afshin Akhondzadeh, Koohi Mohammad Kazem
Department of Food Science and Technology, Islamic Azad University Tehran North Branch Tehran Iran.
Department of Marine Chemistry, Faculty of Marine Science and Technology, Islamic Azad University North Tehran Branch Tehran Iran
RSC Adv. 2022 Aug 2;12(33):21181-21190. doi: 10.1039/d2ra02481k. eCollection 2022 Jul 21.
Herein, a novel polypyrrole-polyaniline functionalized magnetic porous carbon (MPC@PPy-PANI) composite material was fabricated and utilized for the separation/extraction of furfurals from baby food and dry milk samples. In this way, magnetite@silica nanoparticles were first synthesized, and then a magnetic metal-organic framework (MMIL-101(Fe)) was prepared. After that, the MMIL-101(Fe) was pyrolyzed in a neutral atmosphere to obtain MPC. Ultimately, the MPC was functionalized with a co-polymer of aniline-pyrrole oxidation polymerization. The synthesis of MPC@PPy-PANI was confirmed with FT-IR spectroscopy, SEM, TEM, VSM, and XRD techniques. Furfural and hydroxymethyl furfural were selected as the model analytes, which were separated/quantified on an HPLC-UV instrument. The LODs, LOQs, and linear dynamic ranges (LDRs) were in the range of 0.3-0.7 μg kg, 1.0-2.5 μg kg, and 1.0-600 μg kg, respectively. Repeatability of the method was studied as an RSD parameter, and was located in the range of 5.5-6.8% (within-day, = 5) and 8.2-9.4% (between-day, = 3 days). The applicability of the proposed method was established by analyzing several baby food and dry milk samples. The relative recovery (RR%) and repeatability were located in the range of 86-111% and 3.3-10.1%, respectively, showing excellent accuracy and precision of the method.
在此，制备了一种新型的聚吡咯-聚苯胺功能化磁性多孔碳（MPC@PPy-PANI）复合材料，并将其用于从婴儿食品和奶粉样品中分离/提取糠醛。具体而言，首先合成了磁铁矿@二氧化硅纳米颗粒，然后制备了磁性金属有机框架（MMIL-101(Fe)）。之后，将MMIL-101(Fe)在中性气氛中热解以获得MPC。最终，通过苯胺-吡咯氧化聚合的共聚物对MPC进行功能化。采用傅里叶变换红外光谱（FT-IR）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、振动样品磁强计（VSM）和X射线衍射（XRD）技术对MPC@PPy-PANI的合成进行了确认。选择糠醛和羟甲基糠醛作为模型分析物，在高效液相色谱-紫外（HPLC-UV）仪器上进行分离/定量。检测限（LOD）、定量限（LOQ）和线性动态范围（LDR）分别在0.3 - 0.7 μg/kg、1.0 - 2.5 μg/kg和1.0 - 600 μg/kg范围内。以相对标准偏差（RSD）参数研究了该方法的重复性，日内（n = 5）RSD在5.5 - 6.8%范围内，日间（n = 3天）RSD在8.2 - 9.4%范围内。通过分析多个婴儿食品和奶粉样品确定了该方法的适用性。相对回收率（RR%）和重复性分别在86 - 111%和3.3 - 10.1%范围内，表明该方法具有出色的准确性和精密度。
