期刊
FOOD CHEMISTRY
卷 230, 期 -, 页码 667-672出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2017.03.099
关键词
Iron; Microextraction; ImageJ; Colorimetric; Scanner
资金
- Innovative Team of Ministry of Education of China [IRT15R56]
- Integration and demonstration of the key technology of industrial capacity promotion for Lanzhou Lily (technological innovation special fiscal funds of Gansu province)
A simple and low cost assay for total iron in various samples based on dispersive liquid-liquid microextraction (DLLME) coupled with digital scanning image analysis was proposed. Orthogonal experiment design was utilized to optimize the amount of extraction solvent and disperser solvent, O-phenanthroline concentration and buffer pH. Under the optimum conditions, the calibration curve was linear over the range of 0.047-1.0 mu g mL(-1) (R-2 > 0.99) of iron. The limit of detection (LOD) for iron was 14.1 mu g L-1 and limit of quantification (LOQ) was 46.5 mu g L-1. The relative standard deviations for seven replicate determinations of 0.5 mu g mL(-1) of iron was 3.75%. The method was successfully applied for analysis of total iron in water and food samples without using any spectral instrument and it could have a potential industrial impact in developing fast and portable devices to analyze the iron content in water and certain foods. (C) 2017 Elsevier Ltd. All rights reserved.
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