Ma Xuemei, Jing Jing, Yu Jiayi, Wang Jingbao, Zhu Hailin, Hu Zhiyong
School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China.
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。
