Self-collected 3D nano-adsorbent GR@p(POSS-co-DMAEMA) applied to the dispersive solid-phase microextraction in parabens detection of condiments

A simplified DSPME method with a facile dispersible and self-collectible nano-adsorbent GR@p(POSS-co-DMAEMA) was established. The difficulty of allowing close contact between the nano-adsorbent and donor sample solution was solved, thus improving the extraction efficiency. Furthermore, the GR@p(POSS-co-DMAEMA) with temperature-sensitive property can self-collect at high temperature, simplifying the DSPME steps (7 min). [Display omitted] •A nano-adsorbent GR@p(POSS-co-DMAEMA) was used to simplify the dispersive solid-phase microextraction (DSPME).•The nano-adsorbent was facile dispersible and self-collectible in water.•The whole extraction process can be as short as 7 min.•Satisfied extraction efficiency can be attributed to the GR@p(POSS-co-DMAEMA) with improved dispersion can increase the contact area with the analyte. In this work, we rationally designed a facile dispersible and self-collectible nano-adsorbent GR@p(POSS-co-DMAEMA) to simplify the dispersive solid-phase microextraction (DSPME). The difficulty of allowing close contact between the nano-adsorbent and donor sample solution was solved, thus improving the extraction efficiency. Furthermore, the GR@p(POSS-co-DMAEMA) with temperature-sensitive property can self-collect at high temperature, simplifying the DSPME steps (7 min). Fabrication and dispersity of GR@p(POSS-co-DMAEMA) were certified by characteristic analyses. Based on above, a method for analyzing four parabens by GR@p(POSS-co-DMAEMA)-DSPME combined with HPLC-UV was established. The feasibility of the method was verified in simulated water targeting four parabens with good precision (RSD%, 1.7–11.3, n = 3) and low detection limits (0.29–0.63 ng mL−1) under optimal conditions. The method was successfully applied to analyze three condiments and obtained relative recoveries between 91.20 and 133.71%. The results showed that the proposed method is promising to be a fast, efficient and reliable method for the trace analysis of parabens.