| A highly sensitive analytical system of separation and simultaneous detection for chlorinated and organo-phosphorus pe sticides in water with GC-ECD has been presented. The compounds, α-BHC, β-BHC, γ-BHC, σ-BHC, dimethoate, methylparathion, malathion, parathion, p,p'- DDD, p, p'-DDE, o, p'-DDT, p, p'-DDT were well separated in 1.5% OV-17 +2% OV-210/Chromosorb-WAW-DMCS-HP(80-100 mesh)column, and their retention time was found to be below i5 minutes. It was demonstrated that these pesticide compounds belonged to the compounds of the dissociative model of capturing electron. The minimum detection limits of this system are 0.2ng/L(α-BHC)and 0.8ng/L(methylparathion). All the linear ranges are at the level of 103 times. The standard recovery is 82.5-100%. |
