Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Lab of Food Quality and Safety, Beijing Technology and Business University, Beijing 100048, PR China.
Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Lab of Food Quality and Safety, Beijing Technology and Business University, Beijing 100048, PR China.
Food Chem. 2015 May 1;174:446-51. doi: 10.1016/j.foodchem.2014.11.050. Epub 2014 Nov 18.
In-situ ionic liquid-dispersive liquid-liquid microextraction (IL-DLLME) method was developed as a pretreatment method for the detection of six chlorophenols (CPs) in honey samples. The hydrophobic ionic liquid [C4MIM][NTf2], formed in-situ by the hydrophilic ionic liquid [C4MIM][BF4] and the ion exchange reagent LiNTf2 was used as the microextractant solvent of CPs from honey sample. Then the enriched analytes were back-extracted into 40 μL of 0.14 M NaOH solution and finally subjected to analysis by high-performance liquid chromatography. The method showed low limit of detection of CPs, 0.8-3.2 μg/L and high enrichment factor, 34-65 with the recoveries range from 91.60% to 114.33%. The method is simple, rapid, environmentally friendly and with high extraction efficiency.
原位离子液体分散液液微萃取（IL-DLLME）法被开发为检测蜂蜜样品中六种氯酚（CPs）的预处理方法。疏水性离子液体[C4MIM][NTf2]由亲水性离子液体[C4MIM][BF4]和离子交换试剂LiNTf2原位形成，用作从蜂蜜样品中萃取CPs 的微萃取溶剂。然后将富集的分析物用 40μL 的 0.14 M NaOH 溶液反萃取，最后用高效液相色谱法进行分析。该方法具有较低的 CPs 检出限，为 0.8-3.2μg/L，较高的富集因子，为 34-65，回收率范围为 91.60%至 114.33%。该方法简单、快速、环保且具有高萃取效率。
