Etched hollow periodic mesoporous organosilica with enlarged pore size for high-performance solid phase microextraction of polybrominated biphenyls

Hollow mesoporous silica has attracted increasing attention due to its outstanding characteristics such as low density, large void, mesoporous channel, and large specific surface area. Herein, a kind of etched hollow periodic mesoporous organosilica (EHPMOS) with enlarged mesopore size was successfully synthesized for highperformance solid phase microextraction (SPME). The etched silica material was prepared as a SPME fiber with uniform morphology, and the enrichment capacities for polybrominated biphenyls (PBBs) were systematically studied. In particular, the EHPMOS showed significant enrichment factors (158-9516) for PBBs. In addition, based on the home-made SPME fiber and gas chromatography-mass spectrometry (GC-MS), an ultrasensitive analytical method was developed, with low limits of detection (0.11-0.32 ng center dot L-1), a wide linear range (1-1000 ng center dot L-1), and satisfactory reproducibility. And accurate quantifications of ultra-trace PBBs in environmental water sample were achieved.

Automated summary

Hollow mesoporous silica with enlarged mesopore size (EHPMOS) was successfully synthesized for high-performance solid phase microextraction (SPME) in this study. The EHPMOS demonstrated significant enrichment factors (158-9516) for polybrominated biphenyls (PBBs). An ultrasensitive analytical method based on the home-made SPME fiber and gas chromatography-mass spectrometry (GC-MS) was developed, allowing for accurate quantifications of ultra-trace PBBs in environmental water sample.