Residue Dynamics of Phoxim in Pericarp, Sarcocarp and Kernel of Apple
The temporal and spatial variations of phoxim residue in apples were studied. The insecticide phoxim was applied by spraying according to the rec-ommended dosage. The phoxim residues in different parts of apple were ex-tracted with acetonitrile, purified by primary secondary amine (PSA) and C18 filler, and then determined by gel permeation chromatography-gas chromato-graph mass spectrometer (GPC-GC/MS). It was disclosed that the half-life of phoxim in apples was 1.64 days. The contents of the phoxim residue in differ-ent parts of apple could be ranked as follows : pericarp>entire apple>sarco-carp>kernel, and the ratio of residue in pericarp and the entire apple ranged from 6.241 to 9.262 in groups with different specific surface area. There were significant differences in the contents of residues between the pericarp and en-tire apple, which provided the evidence in the theory instruction and design basis to the sampling method of pesticide residue based on pericarp.
Apple Phoxim Sampling method Residue dynamics GPC-GC/MS
Yunxia Luan Hua Ping Ligang Pan
Beijing Research Center for Agrifood Testing and Farmland Monitoring,100097 Beijing,China Beijing Re Beijing Research Center for Agrifood Testing and Farmland Monitoring,100097 Beijing, China Beijing R
国际会议
南昌
英文
457-464
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）