| Autor: |
Shen W; Animal, Plant and Food Inspection Center, Nanjing Customs, Nanjing 210019, China., Wu B; Animal, Plant and Food Inspection Center, Nanjing Customs, Nanjing 210019, China., Wang H; Animal, Plant and Food Inspection Center, Nanjing Customs, Nanjing 210019, China., Wang X; Animal, Plant and Food Inspection Center, Nanjing Customs, Nanjing 210019, China., Yu K; Animal, Plant and Food Inspection Center, Nanjing Customs, Nanjing 210019, China., Lu H; Animal, Plant and Food Inspection Center, Nanjing Customs, Nanjing 210019, China., Hu G; Animal, Plant and Food Inspection Center, Nanjing Customs, Nanjing 210019, China., Li J; Animal, Plant and Food Inspection Center, Nanjing Customs, Nanjing 210019, China. |
| Abstrakt: |
A method was established for the determination of five acylpyrazole pesticide residues in edible vegetable oils using gas chromatography-negative chemical ionization-mass spectrometry (GC-NCI-MS). The pesticides were extracted from a sample with acetonitrile under freezing conditions. A simple cleanup step known as QuEChERS was then conducted. After being identified by GC-NCI-MS, the extracts were quantified using an external standard method that employs a matrix correction standard curve. The linearity of the method was good between 20 and 1000 μg/L, and all limits of quantification were less than 2 μg/kg. Recoveries of all pesticides were in the range of 82.7%-112.4% at the three spiked levels of 0.01, 0.02, and 0.05 mg/kg, and all relative standard deviations were not more than 12.3%. Therefore, this method can be used to determine the residues of acylpyrazole pesticides in edible vegetable oils. |
