Determination of nine β-agonist residues in pork by ultrasound-assisted extraction-LC MS/MS
The samples were extracted by 1%acetic acid-acetonitril,added with n-hexane saturated by acetonitrile.After vortexed,sonicated and centrifuged,the acetonitrile layer was taken and dried with nitrogen gas,dissolved in 0.1%formic acid water.LC-MS/MS was used for analysis and internal standard method was used for quantification.The linear ranges of the nine β-agonists was 0.5-20μg/kg,the limits of detection was 0.2μg/kg,the quantification limit was 0.5μg/kg,and the recoveries were 70.3%—100.7%.The method is economical,simple,rapid,accurate.
NETL
NSTL
万方数据
维普
