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首页> 外文期刊>International journal of environmental analytical chemistry >Simultaneous determination of five strobilurin fungicides and the metabolite BF-500-3 in cereals, fruits and vegetables
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Simultaneous determination of five strobilurin fungicides and the metabolite BF-500-3 in cereals, fruits and vegetables

机译：同时测定谷物，水果和蔬菜中的五种嗜球果伞素杀菌剂和代谢产物BF-500-3

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A rapid and sensitive method for the simultaneous determination of five strobilurin fungicides and the metabolite BF-500-3 in cereals (maize and wheat), fruits (grape and apple) and vegetables (cucumber and tomato) was developed by a Quick, Easy, Cheap, Effective, Rugged and Safe (QuEChERS) method using high-performance liquid chromatography/tandem mass spectrometry (HPLC-MS/MS). The five strobilurin fungicides (kresoxim-methyl, picoxystrobin, pyraclostrobin, azoxystrobin and trifloxystrobin) and the metabolite BF-500-3 were extracted from six matrices using acetonitrile and subsequently cleaned up by dispersive solid phase extraction (d-SPE) using octadecylsilane (C-18) as sorbent prior to HPLC-MS/MS analysis. The determination of the six compounds was achieved in less than 6.0min using an electrospray ionisation source in positive mode (ESI+). This method showed the linearity with the coefficients of determination (R-2) higher than 0.9929. The limits of quantification (LOQs), defined as the lowest spiking level, were 5 mu g/kg for all the fungicides in all matrices. Recovery studies were performed at three fortification levels (5, 10 and 100 mu g/kg) and the overall average recoveries ranged from 76.9% to 114.2% with the relative standard deviation (RSD) less than 13.6% for all the analytes. The method is demonstrated to be convenient and reliable for the routine monitoring of five strobilurin fungicides and the metabolite BF-500-3 in cereals, fruits and vegetables.
机译：一种快速，灵敏的方法，用于快速测定谷物（玉米和小麦），水果（葡萄和苹果）和蔬菜（黄瓜和番茄）中的五种伞菌素杀菌剂和代谢产物BF-500-3，使用高效液相色谱/串联质谱（HPLC-MS / MS）的廉价，有效，坚固和安全（QuEChERS）方法。使用乙腈从6种基质中提取5种strobilururin杀菌剂（kresoxim-methyl，picoxystrobin，pyrosloslostrobin，azoxystrobin和trifloxystrobin）和代谢产物BF-500-3，随后使用十八烷基硅烷（C-）通过分散固相萃取（d-SPE）进行净化。 -18）作为吸附剂，然后进行HPLC-MS / MS分析。使用正模式电喷雾电离源（ESI +），可以在不到6.0分钟的时间内完成对六种化合物的测定。该方法显示出线性，测定系数（R-2）高于0.9929。在所有基质中，所有杀菌剂的定量限（LOQ）均定义为最低加标水平，为5μg / kg。在三种强化水平（5、10和100μg/ kg）下进行了回收率研究，所有分析物的总体平均回收率范围为76.9％至114.2％，相对标准偏差（RSD）小于13.6％。实践证明，该方法对谷物，水果和蔬菜中的五种球果伞素类杀菌剂和代谢产物BF-500-3的常规监测非常方便，可靠。

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