Rapid and sensitive determination of the prochloraz residues in the cultivated mushroom, Agaricus bisporus (Lange) Imbach

[摘要] The QuEChERS (quick, easy, cheap, efficient, rugged, and safe) sample preparation method and gas chromatography-electron capture detector (GC-ECD) were adopted for rapid extraction and determination of prochloraz residues in cultivated mushrooms. The results were further confirmed by using a gas chromatography-mass spectrometry (GC-MS) system. The method showed that there was a good linear relationship with a correlation coefficient of r2 = 0.999 in the concentration ranges from 52.9 to 1000 μg L−1. The limit of detection (LOD) of the GC-ECD method was 15.9 μg kg−1 and the limit of quantification (LOQ) was 52.9 μg kg−1. The data satisfactorily demonstrated the good repeatability of the method with relative standard deviations (RSDs) lower than 20%. The recovery values for spiked mushroom samples were 100.6 ± 1.6% and 105.6 ± 3.9% for 250 and 1000 μg kg−1, respectively. The samples from seven different mushroom growing facilities were analyzed. The residue levels of prochloraz ranged from

[学科分类] 分析化学