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A rapid method based on solid phase extraction-ultra performance convergence chromatography was established for the determination of bisphenol A (BPA) in environmental water. The chromatographic conditions and solid phase extraction conditions were investigated, and the rapid and effective analysis of BPA could be achieved in 4 min. The results showed that the method has a good linearity with BPA in the range of 0.20-100 mg/L with correlation coefficient (R2) of 0.9996. Furthermore, the limit of detection (LOD) was 0.01 mg/L. The spiked recovery (R) and relative standard deviation (RSD) were 89.7%∼109.2% and 2.78%∼4.66%, respectively. The method is rapid, simple, accurate and reliable, which can provide technical reference for the detection of BPA in environmental water.

A rapid, sensitive, and practical QuEChERS method coupled with gas chromatography-mass spectrometry was developed for the simultaneous determination of 16 chemical adjuvant residues in samples of fruits (apple, nectarine, grape) and vegetables (tomato, cucumber, spinach). All target compounds were separated in less than 16 min. Samples were extracted with acetonitrile, and the types of extraction salt and cleanup sorbent were optimized. The optimized method was validated by evaluating the linearity, accuracy, precision, and matrix effect. The recoveries of the 16 pesticides adjuvants ranged from 61.2 to 116.3% with relative standard deviations lower than 11.6%. Limits of detection ranged from 0.21 to 3.02 μg/kg, and limits of quantification ranged from 0.71 to 10.07 μg/kg. Finally, the developed method was successfully employed to identify and quantify pesticide adjuvant residues in the analysis of 30 real fruit and vegetable samples.

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