Abstract:Nine kinds of halogen-containing plasticizers including chlorendic anhydride (CA), 1,1,2,3,3,3-hexafluoro-1-Propene (HFP), difluoro-chloromethane (R-22), 5-Chloro-2-Methyl- 4-Isothiazolin -3-One (CMI), chlorinated paraffin 42 (CP-42), chlorinated paraffin 52 (CP-52), 1-(3-Chloroallyl)-3,5,7-triaza-1-azoniaadamantane chloride (Quaternium-15), 2 - (2 - hydroxy - 3 - tert-butyl -5 - methyl-phenyl) -5- (UV-326), and pentachlorophenol methyl stearate (MPCS) were extracted by ultrasonic with ethyl acetate as solvent.. Rice and flour products were made from spiked samples as halogen-containing plasticizer. The effects of solid-liquid ratio, ultrasonic power and ultrasonic extraction time on halogen-containing plasticizers extraction yield were investigated. The optimum condition of extraction was obtained by response surface methodology test. The optimal process conditions were solid-liquid ratio of 1:13 (m/V), extraction time of 20 min and ultrasonic power of 120 W. Under these conditions, the standard deviations of retention time and peak area were no more than 0.007 and 0.061 respectively. Detection limit of the nine kinds of halogen-containing plasticizers varied between 0.01 μg/L~15 mg/L, the average recovery were between 87.54~97.65%, and the relative standard deviations were 4.63~7.81%.Therefore, the method was suitable for the extraction of the nine plasticizers mentioned above in rice and flour products.
