目的:探索、建立大体积直接进样,离子色谱法测定水中草甘膦的含量的方法。方法:以AS19柱分离,在30 mmol/L KOH为淋洗液、流速为1.2 ml/min、进样量为500μl、电导检测条件下进行试验。结果:测定的草甘膦含量在5μg/L~1000μg/L浓度范围内呈良好线性关系,相关系数r大于0.9999,测定相对标准偏差均小于3%,回收率在78%~98%之间。结论:该方法操作简便,灵敏,结果可靠。 Objective: To explore and establish a method of direct injection of large volume and determination of glyphosate in water by ion chromatography. Methods: The AS19 column was used as the eluent, the flow rate was 1.2 ml / min with 30 mmol / L KOH as the eluent, and the injection volume was 500μl. Results The glyphosate content in the range of 5μg / L to 1000μg / L showed a good linearity. The correlation coefficient r was greater than 0.9999. The relative standard deviations were less than 3% and the recoveries were between 78% and 98%. Conclusion: The method is simple, sensitive and reliable.