一种新型苹果果胶 - 铁（III）配合物的合成与表征
Synthesis and Characterization of a Novel Apple Pectin-Fe(III) Complex.
作者信息
Ma Xuemei, Jing Jing, Yu Jiayi, Wang Jingbao, Zhu Hailin, Hu Zhiyong
机构信息
School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China.
出版信息
ACS Omega. 2021 Jan 7;6(2):1391-1399. doi: 10.1021/acsomega.0c05029. eCollection 2021 Jan 19.
In the present study, apple pectin (AP) extracted from apple pomace was used to chelate with Fe(III) to synthesize an AP-Fe(III) complex. The obtained AP-Fe(III) complex was characterized by UV-vis spectroscopy, FTIR, XPS, and TG analysis. The Fe content in the AP-Fe(III) complex was determined to be 24.5%. Moreover, the reduction properties of the complex were also investigated. The AP-Fe(III) complex was found to be soluble in water and maintained stability in the pH range of 3-8. The complex was reduced to Fe(II) after 6 h. In addition, the AP-Fe(III) complex did not release iron ions in the simulated gastric fluid, and Fe release of the complex reached 96.5% after 4 h of digestion in simulated intestinal fluid. In particular, the antioxidant activity of the AP-Fe(III) complex against free DPPH and ABTS radicals was evaluated. The results obtained in this study demonstrate the potential of the AP-Fe(III) complex as a novel iron supplement.
在本研究中，从苹果渣中提取的苹果果胶（AP）与Fe(III)螯合以合成AP-Fe(III)络合物。通过紫外可见光谱、傅里叶变换红外光谱、X射线光电子能谱和热重分析对所得的AP-Fe(III)络合物进行了表征。测定AP-Fe(III)络合物中的铁含量为24.5%。此外，还研究了该络合物的还原性能。发现AP-Fe(III)络合物可溶于水，并在pH值为3-8的范围内保持稳定。该络合物在6小时后还原为Fe(II)。此外，AP-Fe(III)络合物在模拟胃液中不释放铁离子，在模拟肠液中消化4小时后，该络合物的铁释放率达到96.5%。特别地，评估了AP-Fe(III)络合物对游离DPPH和ABTS自由基的抗氧化活性。本研究获得的结果证明了AP-Fe(III)络合物作为新型铁补充剂的潜力。
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