Food Science and Technology Programme, c/o Department of Chemistry, National University of Singapore, Singapore 117543, Singapore; School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore; National University of Singapore (Suzhou) Research Institute, 377 Lin Quan Street, Suzhou Industrial Park, Suzhou, Jiangsu 215123, PR China.
Food Science and Technology Programme, c/o Department of Chemistry, National University of Singapore, Singapore 117543, Singapore.
Food Chem. 2019 Nov 30;299:125144. doi: 10.1016/j.foodchem.2019.125144. Epub 2019 Jul 8.
Magnetic nanoparticles were synthesised to extract Sudan dyes from chilli powders. The adsorbents used were magnetic ferroferric oxide nanoparticles coated with polystyrene. The extraction procedures for Sudan dyes comprised liquid-solid extraction and magnetic solid phase extraction. The conditions were optimised to achieve efficient magnetic solid phase extraction, including extraction and desorption time, type and volume of the desorption solvent, and the mass of the adsorbents. Repeatability tests showed satisfactory recovery rates of 80.2-115.8%, with a relative standard deviation <3.8%. The results suggested that the proposed extraction method was effective and efficient to extract Sudan dyes from chilli powders. The extraction process was simpler compared with traditional approaches because the adsorbents can be rapidly removed from the sample matrix using a permanent magnet. The use of recyclable adsorbents decreased the cost greatly. Chilli powder samples collected from local markets in Singapore were tested using the proposed method under optimum conditions.
磁性纳米粒子被合成出来，以从辣椒粉中提取苏丹染料。所使用的吸附剂是用聚苯乙烯涂覆的磁性四氧化三铁纳米粒子。苏丹染料的提取程序包括液-固萃取和磁固相萃取。优化了条件以实现高效的磁固相萃取，包括萃取和洗脱时间、洗脱溶剂的类型和体积以及吸附剂的质量。重复性测试显示回收率为 80.2-115.8%，相对标准偏差<3.8%。结果表明，该提取方法有效、高效，可从辣椒粉中提取苏丹染料。与传统方法相比，该提取过程更简单，因为吸附剂可以使用永久磁铁从样品基质中快速去除。使用可回收吸附剂大大降低了成本。在所提出的最佳条件下，使用从新加坡当地市场收集的辣椒粉样品对该方法进行了测试。
