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目的:研究高效液相色谱法测定水样中莠去津的最佳方法。方法:用二氯甲烷萃取水样中的莠去津,浓缩,挥干,甲醇定容后用高效液相色谱仪测定。色谱条件:waters Atlantis C18柱(4.6×250 mm,4.6μm);流动相:甲醇/水(60/40);二极管阵列检测器,检测波长220 nm。结果:在0.05μg/ml~5.0μg/ml范围内有良好线性关系,r=0.9999。最低检测质量0.5 ng,样品最低检测浓度为0.0005 mg/L。相对标准差3.6%~4.2%,回收率88%~91%。结论:用该方法测定水样中的莠去津,能获得满意的结果。
Objective: To study the best method for the determination of atrazine in water samples by high performance liquid chromatography. Methods: Atrazine in water samples was extracted with dichloromethane, concentrated, evaporated and the volume of methanol was determined by high performance liquid chromatography. Chromatographic conditions: Waters Atlantis C18 column (4.6 × 250 mm, 4.6 μm); mobile phase: methanol / water (60/40); diode array detector with detection wavelength of 220 nm. Results: There was a good linear relationship in the range of 0.05μg / ml ~ 5.0μg / ml, r = 0.9999. The minimum detectable mass is 0.5 ng and the minimum detectable concentration is 0.0005 mg / L. Relative standard deviation of 3.6% to 4.2%, the recovery rate of 88% to 91%. Conclusion: This method can be used to determine atrazine in water samples with satisfactory results.