In situ fabrication of metal-organic hybrid gels in a capillary for online enrichment of trace analytes in aqueous samples.

In this work we demonstrated a facile method for in situ fabrication of the Fe(3+)-1,3,5-benzenetricarboxylic acid (BTC) metal-organic coordination polymer gel in a capillary, which was efficiently applied to the online enrichment of trace polycyclic aromatic hydrocarbons (PAHs) in environmental water and amphetamines drugs in urine.