An AChE biosensor,connected with a flow injection analysis system(FIA),was derigned to detect methyl-parathion in seawater rapidly,by colorimetric determination of the activity change of the immobilized AChE from the organophosphorus pesticide.

• 将乙酰胆碱酯酶(acetylcholinesterase,AChE)传感器与流动注射系统(flow injection analysis system,FIA)相结合,通过光学方法测定固定化酶受农药抑制后的残余活性,对海水中微量甲基对硫磷进行定量分析。