A Modified Gas Chromatography Method for Determination of Prochloraz Residues in Fruits

The samples were extracted from acetone after concussion.The procedure of hydrolysis derivation was in test tube with pyridine hydrochlorate.The mixture was hydrolyzed in drying oven at 220℃ for 1.5 h.After treatment the sample was detected by ECD.This method was linearity from 0.01～10.00 ng(R2=0.999 9).0.01,0.1,1 mg/kg prochloraz standard solution were added into banana,green orange,Huaniu apple,green apple,Chinese gooseberry and Dangshan pear blank sample and the recoveries were 81.0%～106.4%.(RSD,n=5) were 0.3%～5.7%.The lower detection limit for prochloraz was 0.01 mg/kg.This method was simple,efficient,quick,convenient,safe,clean,low-cost and could satisfy the requirement of large sample residual analysis.