Determination of sixteen pyrethroids in water using dispersive liquid-liquid microextraction based on dissolved carbon dioxide flotation after emulsification microextraction using gas chromatography with triple quadrupole mass spectrometry
文献类型： 外文期刊
作者： Ye, Jingqing 1 ; Yao, Zhoulin 1 ; Wang, Zhiwei 3 ; Nie, Jing 1 ; Li, Zuguang 1 ;
作者机构： 1.Zhejiang Univ Technol, Coll Chem Engn, Hangzhou 310014, Zhejiang, Peoples R China
2.Zhejiang Acad Agr Sci, Zhejiang Citrus Res Inst, Taizhou 318020, Peoples R China
3.Zhejiang Acad Agr Sci, Key Lab Detect Pesticide Residues & Control Zheji, State Key Lab Breeding Base Zhejiang Sustainable, MOA Key Lab Pesticide Residue Detect,Inst Qual &, Hangzhou 310021, Zhejiang, Peoples R China
期刊名称：ANALYTICAL METHODS （ 影响因子：2.896； 五年影响因子：2.716 ）
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收录情况： SCI
摘要： A method using dissolved carbon dioxide flotation after dispersive liquid-liquid microextraction (DCF-DLLME) was proposed for the determination of sixteen pyrethroids inwater samples, coupledwith gas chromatography with triple quadrupolemass spectrometry in a homemade glass round flask. The DCF-DLLME method is based on the rapid and simple phase separation of a low density organic solvent from the aqueous phase via introducing a saturated NaHCO3 solution into the acidified sample solution (0.10 mol L-1 CH3COOH) containing the analytes. The optimum extraction conditions used 45 mL of dodecanol and 2.6 mL of acetonitrile as the extraction and dispersive solvent respectively, with an extraction time of 40 s and a demulsification time of 80 s. The LOQ for the sixteen pyrethroids was 5 mg L-1 and the LODs were in a range between 0.87 and 1.39 mg L-1. The mean recoveries (n = 15) ranged from 79.6% to 98.2%, with the RSD (n = 15) data ranging from 2.7% to 8.5%. The method broke through the limit of volume for centrifugation, and the device is easy to clean and the volume of sample can be enlarged. Adequate analytical performance characteristics were obtained in terms of linear range and precision for sixteen pyrethroids in water. Satisfactory results were obtained in authentic samples. The results of analysis revealed that this method is simple, fast and environmentally friendly, being successfully applicable for the determination of sixteen pyrethroids in water samples.
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