Search

A mixture of 49 pesticides amenable to gas chromatography (GC) were quantitatively recovered from spiked bamboo shoot, based on QuEChERS-modified, and determined using gas chromatography-tandem mass spectrometry (GC-MS/MS). The method employed involved initial extraction in a acetonitrile,an extraction/partitioning step after the addition of salt,and a cleanup step utilizing dispersive solid-phase extraction by PSA and C18. The sample was dissolved in toluene, and then determined by GC-MS/MS. This combination ensured that it was a rapid, simple and cost-effective procedure. For 49 pesticides, the LOD ranged from 1. 0 to 26. 2 μg/kg respectively,the correlation coefficient was above 0. 99. The spiking levels for the recovery experiments were 10. 0, 50. 0 and 100. 0 μg/kg for GC-MS/MS analyses. Mean recoveries mostly ranged between 62. 5 % and 121. 8 % and relative standard deviations (RSD) were generally 0. 8 %-11. 7%. Based on these results,the methodology has been proved to be highly efficient and robust and thus suitable for monitoring the pesticide residue in bamboo shoot. [ABSTRACT FROM AUTHOR]