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Analysis of nicosulfuron residues in maize field soil by high-performance liquid chromatography

机译：在玉米领域nicosulfuron残留分析土壤由高性能液相色谱法

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摘要

Nicosulfuron is a sulfonylurea herbicide which is applied to control many grasses and broadleaf weed species in maize fields. Carryover or the persistence of nicosulfuron in soil can influence crops in succession even at low concentrations. An experiment was set up to investigate the persistence of nicosulfuron residual used in maize field soil at 80 and 160 active ingredient (ai)/ha application rates at 28 days after sowing to control weeds. The soil was analysed for nicosulfuron residues in surface and subsurface soil by high-performance liquid chromatography (HPLC) using a photo diode array detector. Nicosulfuron residues were dissipated rapidly in the soil surface as compared to subsurface soil. The presence of residues found in the subsurface soil showed the mobility of nicosulfuron into lower layers. At 80 ai/ha, residues were not detected after 60 days. The half-live of nicosulfuron by HPLC was found to be at the range of 14-20 days at different doses and soil depths.
机译：Nicosulfuron是一种磺酰脲类除草剂应用于控制许多草和阔叶树在玉米地杂草物种。持久性的nicosulfuron土壤可以影响农作物连续甚至在低浓度。设立了一个实验来调查持久性nicosulfuron残留中使用玉米田土壤活性成分在80年和160年(ai) /公顷应用利率播种后28天来控制杂草。在表层和次表层的nicosulfuron残留土壤由高性能液相色谱法使用光敏二极管阵列检测器(HPLC)。Nicosulfuron残留物被迅速消散土壤表面和地下土壤。残留在地下发现的存在土壤显示nicosulfuron的流动较低的层。发现后60天。nicosulfuron发现HPLC测定范围在不同的剂量和土壤深度14到20天。

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