中文摘要：本文开发并验证了一个采用改良QuEChERS法和气相色谱法的氮磷检测器，可快速灵敏检测我国青海高原枸杞中新砜杀菌剂甲磺酰菌唑残留。在甲磺酰菌唑处理时，本文采用碱性乙腈提取、NaCl和硫酸镁的混合物进行分区、30mg和100mg硫酸镁亚混合物进行清洗；该方法在0.01-5 μg/mL浓度范围内线性良好，相关系数大于0.9999。在三种不同设防水平下回收率在90.40-100.9%范围，相对标准差小于5%，检测限和定量限分别为0.003 mg/kg和0.01mg/kg；本文所检测的三种枸杞产品中，所有阳性样本中甲磺酰菌唑残留量均低于欧盟规定的标准，本研究有助于建立枸杞甲磺酰菌唑农药合适的喷施频率和收获间隔。
外文摘要：A fast and sensitive analytical method for the determination of jiahuangxianjunzuo (JHXJZ) using gas chromatography equipped with nitrogen-phosphorus detector was developed and validated for the analysis of Goji berry which is grown in Qinghai Plateau of China. This method employs modified QuEChERS followed by detection. JHXJZ was extracted by alkaline acetonitrile [containing 1% (v/v) NH3 center dot H2O] and partitioned with a mixture of NaCl and Mg2SO4, and then cleanup was done with 30 mg GCB and 100 mg MgSO4. With this modified QuEChERS procedure, the linearity over a concentration range 0.01-5 mu g mL(-1) was good with a correlation coefficient (r) > 0.9999. Recovery at three different fortification levels was 90.40-100.9%, respectively, with a relative standard deviation < 5% for all analytes. The limits of detection and the limits of quantification were 0.003 and 0.01 mg kg(-1), respectively. JHXJZ was detected on three Goji berry food products; all positive samples showed JHXJZ contents below the legal limit established by the EU for other analogous berry-based products. These results can be used to help establish appropriate application frequencies and harvest intervals for JHXJZ on Goji berry.
外文关键词：Gas chromatography, Modified QuEChERS, JHXJZ, Goji berry, Residue
作者：Chen, Hongyu; Li, Wei; Wei, Youhai; Guo, Qingyun
作者单位：Qinghai Univ, Minist Agr,Sci Observing & Expt Stn Crop Pest Xin, Key Lab Agr Integrated Pest Management Qinghai Pr, Acad Agr & Forestry Sci,State Key Lab Plateau Eco, Xining 810016, Qinghai, Peoples R China.
期刊名称：CHROMATOGRAPHIA
期刊影响因子：1.402
出版年份：2017
出版刊次：12
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