Hollow tube covalent organic framework for syringe filter-based extraction of ultraviolet stabilizer in food contact materials

Concentrations, Profiles, and Health Risks of Organic Ultraviolet Filters in Eight Food Categories Determined through the Sixth Chinese Total Diet Study

“…High UV-P concentrations that could pose risks to human health can therefore occur in food. UV-9 is used in antimicrobial granules for agricultural use and in rubber baking molds, , but low detection frequencies and concentrations have previously been found, consistent with the relatively low UV-9 concentrations we found. This may indicate that little UV-9 is produced and used in China.…”

“…The median contributions of the other UV filters to the ∑UV filter concentrations were 0.03%–0.51%, and the median contribution of UV-328 was 0.03%. UV-P is used as an agricultural spray adjuvant and in antimicrobial formulations, mulch films, and rubber baking molds in China − and has been frequently detected in biosolid-amended soil used as an agricultural fertilizer . UV-P can migrate into food during cooking and crop growth and biomagnify through the food chain.…”

Primary amide‐functionalized cyclotricatechylene covalent organic frameworks membrane for efficient enrichment of melamine and its derivatives in migration solution of food contact materials

“…The cyclotricatechylene covalent organic framework (CTC-TFPN-COF) was synthesized according to our previous work with minor modifications [16], as shown in S2, S3, and S4. As for CTC-COF-CONH 2 , 100.0 mg CTC-TFPN-COF and 10 ml 6.0 mmol/L NaOH were added to a 100 ml flask, followed by refluxing at 120 • C for 3 days.…”

“…The techniques above are time-consuming and energy-intensive for the separation and enrichment of large volumes of liquid samples. Membrane-based SPE allows for rapid enrichment of large volumes at low pressures, thus reducing the sample preparation time [14][15][16]. An in-syringe membrane-based extraction is a typical form of SPE, providing an effective method for rapid and convenient extraction of the analytes.…”