A novel cloud-point extraction （CPE） was successfully used in preconcentration of biphenol A （BPA） from aqueous solutions. Majority of BPA is extracted into the surfactant-rich phase. The parameters affecting the ...A novel cloud-point extraction （CPE） was successfully used in preconcentration of biphenol A （BPA） from aqueous solutions. Majority of BPA is extracted into the surfactant-rich phase. The parameters affecting the CPE such as concentration of surfactant and electrolyte, equilibration temperature and time and pH of sample solution were investigated. The samples were analyzed by high-performance liquid chromatography with ultraviolet detection. Under the optimized conditions, preconcentration of 10 mL sample gives a preconcentration factor of 11. The limit of detection （LOD） and limit of quantification （LOQ） are 0.1 μg/L and 0.33 μg/L, respectively. The linear range of the proposed method is 0.2-20 μg/L with correlation coefficients greater than 0.998 7 and the spiking recove6es are 97.96%-100.42%. The interference factor was tested and the extraction mechanism was also investigated. Thus, the developed CPE has proven to be an efficient, green, rapid and inexpensive approach for extraction and preconcentration of BPA from water samples.展开更多
A method of determination of trimethyltin chloride in water samples by GC-MS was developed.Trimethyltin chloride was extracted from water sample by ethyl acetate and detected by GC-MS.The linear range of trimethyltin ...A method of determination of trimethyltin chloride in water samples by GC-MS was developed.Trimethyltin chloride was extracted from water sample by ethyl acetate and detected by GC-MS.The linear range of trimethyltin chloride was from 0.49 to 98.0 μg/mL,r= 0.999 7 and the lowest detection concentration was 0.005 mg/L when the sample volume was 50 mL.The RSD was 4.7%(n=6) and the recovery were 109.4%-117.4%.展开更多
基金Project(20956001) supported by the National Natural Science Foundation of ChinaProject(CX2011B083) supported by Hunan Provincial Innovation Foundation for Postgraduate, ChinaProject(K1104026-11) supported by Project of Changsha Science and Technology Bureau, China
文摘A novel cloud-point extraction （CPE） was successfully used in preconcentration of biphenol A （BPA） from aqueous solutions. Majority of BPA is extracted into the surfactant-rich phase. The parameters affecting the CPE such as concentration of surfactant and electrolyte, equilibration temperature and time and pH of sample solution were investigated. The samples were analyzed by high-performance liquid chromatography with ultraviolet detection. Under the optimized conditions, preconcentration of 10 mL sample gives a preconcentration factor of 11. The limit of detection （LOD） and limit of quantification （LOQ） are 0.1 μg/L and 0.33 μg/L, respectively. The linear range of the proposed method is 0.2-20 μg/L with correlation coefficients greater than 0.998 7 and the spiking recove6es are 97.96%-100.42%. The interference factor was tested and the extraction mechanism was also investigated. Thus, the developed CPE has proven to be an efficient, green, rapid and inexpensive approach for extraction and preconcentration of BPA from water samples.
文摘A method of determination of trimethyltin chloride in water samples by GC-MS was developed.Trimethyltin chloride was extracted from water sample by ethyl acetate and detected by GC-MS.The linear range of trimethyltin chloride was from 0.49 to 98.0 μg/mL,r= 0.999 7 and the lowest detection concentration was 0.005 mg/L when the sample volume was 50 mL.The RSD was 4.7%(n=6) and the recovery were 109.4%-117.4%.
