A porous Cd(ii)-MOF-coated quartz fiber for solid-phase microextraction of BTEX

Abstract

The utilization of a porous Cd(II)-MOF ([Cd(L)₂(ClO₄)₂]·H₂O) (L = 4-amino-3,5-bis(4-pyridyl-3-phenyl)-1,2,4-triazole) with good thermal/chemical stability for solid-phase micro-extraction (SPME) is reported. The Cd(II)-MOF thin films are expediently in situ grown on quartz fiber in solution, exhibiting high sensitivity and selectivity towards volatile benzene, toluene, o-, m-, p-xylene, and ethylbenzene (termed as BTEX) aromatics. The limits of detection for BTEX are 0.01–0.001 μg L⁻¹.