Determination of 18 Kinds of Plasticizer in Tea with Milk Using GC-MS
To establish a method for determination of 18 kinds of plasticizer in tea with milk using GC-MS.Sample were extracted by n-hexane and purified by GC-MS SIM mode of electrospray ionization.The concentration of 17 kinds of phthalate standard solution were good in the range of 10～400 μg/L and The concentration of diisononyl phthalate standard solution was good in the range of 500～5 000 μg/L,the correlation coefficients were more than 0.996.The recoveries were ranged from 86.7%to 107.8%when the content of 17 kinds of plasticizer at 0.1,0.5 and 1.0 mg/kg levels and the content of diisononyl phthalate at 0.5,2.0 and 3.0 mg/kg levels,and the relative standard deviation was 0.03%～1.79%(n = 6).The method has simple pretreatment and accurate detetion date,and can be used for the detection of phthalates in large quantities of tea with milk.
gas chromatography mass spectrometrytea with milkplasticizer
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