Automated Magnetic Solid-Phase Extraction for Synthetic Food Colorant Determination
作者： Hao Wu , Nannan Gao , Lizhen Zhang , Yunrong Li , Yating Shi
DOI: 10.1007/S12161-015-0219-2
关键词:
摘要: A new automated magnetic solid-phase extraction (MSPE) method was developed and combined with high-performance liquid chromatography (HPLC) spectrophotometry for off-line on-line quantitative enrichment determination of synthetic food colorants in samples. Fe3O4-poly (ionic liquid) core-shell microspheres were prepared as a sorbent to quickly extract analytes from aqueous The entire MSPE process, including extraction, separation, elution, cleaning, using common equipment. main parameters affecting the performance such absorbent, sample pH, eluent, flow rate, elution time, etc., investigated detail. Under optimum experimental conditions, limits detection ranged between 4.1 14 ng/mL by HPLC 220 ng/mL amaranth spectrophotometry, excellent reproducibility (intra- inter-day relative standard deviations less than 3.2 %). successfully applied
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