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In vivo analysis of two new fungicides in mung bean sprouts by solid phase microextraction-gas chromatography-mass spectrometry

Shi, Zhen, Chen, Dan, Chen, Tian-Tian, Wei, Ge, Yin, Chun-Yan, Xu, Hui, Yang, Guang-Fu
Food chemistry 2019 v.275 pp. 688-695
bean sprouts, coatings, food analysis, fungicides, gas chromatography-mass spectrometry, mung beans, nanofibers, quantitative analysis, silica, solid phase microextraction, standard deviation
A novel solid phase microextraction-gas chromatography-mass spectrometry (SPME-GC–MS) method was developed to quantify two new fungicide residuals (Y13149, Y12196) in mung bean sprouts. With a stable and biocompatible elcetrospinning nanofiber (polystyrene/graphene@silica, PS/G@SiO2) as coating, the SPME fiber was directly inserted into the stem of mung bean sprout to in-situ in-vivo sampling and extraction, followed by GC–MS analysis. Under the optimal conditions, satisfactory average recoveries of 99% and 72% were obtained for Y13149 and Y12196 with the relative standard deviations (RSDs) under 16.3%, indicating good precision and anti-matrix ability of the method. The result also exhibited low detection limit (0.06–0.08 μg·L−1) and wide liner range (0.3–100 μg·L−1) with the correlation coefficients (R2) of 0.9989. The established method was applied successfully to trace the accumulation and distribution of fungicides in mung bean sprouts, and it provides a simple, rapid and reliable quantitative method for food analysis.