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中文摘要：
采用离子对试剂作流动相，离子色谱紫外检测法测定蔬菜中残留的百草枯，在流速为0．25mL／min，淋洗液为10％（体积分数）乙腈和0．05mol／L七氟丁酸的混合液时能够快速稳定出峰，且与其他干扰离子充分分离，百草枯的检测下限为5．1μg／L，具有良好的线性关系和重现性。对青菜样品中百草枯进行测定，回收率在86．5％～93．8％，结果令人满意。
英文摘要：
An ion-pair chromatography-UV detection （at 257 nm） method was developed for separation and measurement of the residual herbicide paraquat in vegetable samples. Rapid separation was achieved in a Dionex IonPac NSI（4 mm× 150 mm） column using 0.25 mL/min of the eluent mixture of 0.05 mol/L HFBA and 10% ACN. Both the peak height and peak area were well correlated with the paraquat concentration by linear functions. With a detection limit of 5. 1 μg/L and 86. 5%-93.8% recovery of the spiked paraquat, the method can be employed to measure residual paraquat in many vegetables and other food items.
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