色谱法
化学
萃取(化学)
高效液相色谱法
分散剂
溶剂
分散器
离子液体
富集因子
检出限
样品制备
色散(光学)
材料科学
生物化学
物理
催化作用
有机化学
光学
复合材料
作者
Ying Wang,Jingyan You,Ruibing Ren,Yao Xiao,Shiqian Gao,Hanqi Zhang,Aimin Yu
标识
DOI:10.1016/j.chroma.2010.03.031
摘要
Dispersive liquid–liquid microextraction (DLLME) high-performance liquid chromatography (HPLC) was developed for extraction and determination of triazines from honey. A room temperature ionic liquid, 1-hexyl-3-methylimidazolium hexafluorophosphate [C6MIM][PF6.], was used as extraction solvent and Triton X 114 was used as dispersant. A mixture of 175 μL [C6MIM][PF6] and 50 μL 10% Triton X 114 was rapidly injected into the 20 mL honey sample by syringe. After extraction, phase separation was performed by centrifugation and the sedimented phase was analyzed by HPLC. Some experimental parameters, such as type and volume of extraction solvent, concentration of dispersant, pH value of sample solution, salt concentration and extraction time were investigated and optimized. The detection limits for chlortoluron, prometon, propazine, linuron and prebane are 6.92, 5.84, 8.55, 8.59 and 5.31 μg kg−1, respectively. The main advantages of the proposed method are simplicity of operation, low cost, high enrichment factor and extraction solvent volume at microliter level. Honey samples were analyzed by the proposed method and obtained results indicated that the proposed method provides acceptable recoveries and precisions.
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