采用 QuEChERS 方法和 LC-MS/MS 测定菠菜、黄瓜、苹果和柚子中的 6 种新烟碱类杀虫剂残留。
Determination of six neonicotinoid insecticides residues in spinach, cucumber, apple and pomelo by QuEChERS method and LC-MS/MS.
机构信息
Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193, People's Republic of China.
出版信息
Bull Environ Contam Toxicol. 2012 Jun;88(6):885-90. doi: 10.1007/s00128-012-0579-x. Epub 2012 Mar 8.
A modified QuEChERS and LC-MS/MS method has been developed for the simultaneous determination of residues of six neonicotinoids in various crops, including spinach, cucumber, apple and pomelo. The method showed good linearity (R(2) ≥ 0.9995) and precision (RSD ≤ 14.0%). Average recoveries of the six neonicotinoids ranged between 73.7% and 103.8% at spiking levels 0.005, 0.1 and 1 mg kg(-1). The LODs and LOQs were in the ranges of 0.20-0.85 μg kg(-1) and 0.66-2.84 μg kg(-1), respectively. The method was satisfactorily validated for the analysis of 50 agricultural samples. Imidacloprid and imidaclothiz were detected at concentration levels ranging from 7 to 5.3 μg kg(-1).
建立了一种改良的 QuEChERS 和 LC-MS/MS 方法，用于同时测定菠菜、黄瓜、苹果和柚子等各种作物中 6 种新烟碱类杀虫剂的残留量。该方法表现出良好的线性（R²≥0.9995）和精密度（RSD≤14.0%）。6 种新烟碱类杀虫剂在 0.005、0.1 和 1 mg kg⁻¹ 加标水平下的平均回收率在 73.7%至 103.8%之间。LODs 和 LOQs 分别在 0.20-0.85 μg kg⁻¹ 和 0.66-2.84 μg kg⁻¹ 范围内。该方法对 50 个农业样品的分析得到了令人满意的验证。在浓度范围为 7 至 5.3 μg kg⁻¹ 时，检测到了吡虫啉和噻虫嗪。
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