This standard specifies the method for the determination of diquat residues in grains. This standard applies to the determination of diquat residues in corn and barley. The detection limit of this standard is 0.005mg/kg, and the linear range is 0.001mg/L~0.100mg/L.
GB/T 5009.221-2008 history
2008GB/T 5009.221-2008 Determination of the residues of diquat in cereals