Phosphorous-enriched knitting aryl network polymer for the rapid and effective adsorption of aromatic compounds

A phosphorous-enriched knitting aryl network polymer (named as Ph-PPh₃-KAP) was fabricated by one-step crosslinking between triphenylphosphine and benzene, with formaldehyde dimethyl acetal as an external crosslinker. The Ph-PPh₃-KAP had a large surface area and good physicochemical stability. Its adsorption performance for aromatic organic compounds was evaluated by using some dyes and benzene ring-containing compounds as the model adsorbates. The results exhibited that it had a rapid and effective adsorption for the aromatic organic compounds due to the hydrogen bonding and polar interactions of the Ph-PPh₃-KAP with the target compounds. Then, the Ph-PPh₃-KAP was explored as the adsorbent for the solid phase extraction of some phenylurea pesticides from lake water, tomato and cucumber samples prior to HPLC analysis. Under optimal conditions, the linear responses of the phenylurea pesticides were 0.1-100 ng mL^-1 for lake water and 0.5-100 ng g^-1 for cucumber and tomato samples. The limits of detection for the analytes at S/N = 3 were 0.01-0.02 ng mL^-1 for lake water and 0.03-0.05 ng g^-1 for cucumber and tomato samples. The recoveries were in the range from 80.8% to 118%. The Ph-PPh₃-KAP exhibited a great application potential for extraction of aromatic compounds.