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首页> 外文期刊>Science Journal of Chemistry >Method for Residues Analysis of Isoxaflutole and Its Metabolites in Maize
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Method for Residues Analysis of Isoxaflutole and Its Metabolites in Maize

机译：玉米中异黄磷及其代谢物的残留分析方法

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A rapid and sensitive analytical method for the determination of isoxaflutole and diketonitrile (DKN) residues in maize was established based on QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) and high performance liquid chromatography with tandem mass spectrometry (HPLC-MS/MS). The samples were extracted with acetonitrile and purified with octadecylsilane (C_(18)). The mass spectrometer was performed in multi-reaction monitoring mode, and electrospray ionization in negative mode was selected. The isoxaflutole and DKN residues were quantified by the external standard method using the matched standard solution to compensate for matrix effect. The results indicated that the calibration curves of isoxaflutole and DKN were linear in the range of 0.005-0.5mg/L with correlation coefficients of more than 0.9922. When the addition level ranged from 0.01 to 0.1mg/kg the average recoveries of isoxaflutole and DKN in maize, green maize and straw were 95%-108%, and the relative standard deviation (RSD) ranged from 2% to 11%. The limit of quantitation (LOQ) were 0.01 mg/kg in different matrices. This method has many characteristics, such as simple, rapid and accurate, and can be adapted for the confirmation of isoxaflutole and DKN residues in maize samples.
机译：建立了基于QuEChERS（快速，简便，廉价，有效，坚固耐用和安全）和高效液相色谱-串联质谱（HPLC-MS）的快速灵敏的分析方法，用于测定玉米中的异黄磷和二酮腈（DKN）残留量。 /多发性硬化症）。样品用乙腈萃取，并用十八烷基硅烷（C_（18））纯化。质谱仪在多反应监测模式下进行，并且选择负模式下的电喷雾电离。使用匹配的标准溶液通过外标方法对异恶草酮和DKN残留进行定量，以补偿基质效应。结果表明，在0.005-0.5mg / L范围内，异恶氟丁酮和DKN的校正曲线呈线性关系，相关系数大于0.9922。当添加量为0.01至0.1mg / kg时，玉米，绿色玉米和秸秆中异恶草酮和DKN的平均回收率为95％-108％，相对标准偏差（RSD）为2％至11％。在不同基质中，定量限（LOQ）为0.01 mg / kg。该方法具有许多特点，例如简单，快速和准确，可用于确认玉米样品中的异恶草酮和DKN残留。

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