Polydopamine-based immobilization of zeolitic imidazolate framework-8 for in-tube solid-phase microextraction.
Zeolitic imidazolate frameworks (ZIFs), a subfamily of metal-organic frameworks (MOFs), have received considerable attention as a novel porous material for sample preparation due to their fascinating structures and unique properties. Here, we developed a novel bio-inspired polydopamine (PDA) method to immobilize ZIFs inside the chemical resistance poly(ether ether ketone) (PEEK) tube for online solid-phase microextraction (SPME). Firstly, PDA layer was assembled inside the PEEK tube. Secondly, attributing to its noncovalent adsorption and covalent reaction ability, PDA could attract and anchor ZIF-8 nutrients onto the inner surface of PEEK tube to promote the nucleation and growth of ZIF-8. The morphology and surface properties of the prepared ZIF-8-PDA-PEEK tube were characterized by scanning electron microscopy and energy dispersive X-ray spectrometry. The ZIF-8-PDA-PEEK tube exhibits excellent extraction efficiency toward six polycyclic aromatic hydrocarbons (PAHs), with enrichment factor from 550 to 734. The developed online SPME-HPLC method shows good linearity (10-5000pg/mL) and low detection limits (0.5-5 pg/mL) for six PAHs. It also has been used to determine PAHs in environmental samples, with recoveries in the range of 82.5-98.6%.
Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Wuhan University), Ministry of Education, and Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China; State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Beijing 10080, China.
Juan
J
Zhang
Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Wuhan University), Ministry of Education, and Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China; State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Beijing 10080, China.
Wenpeng
W
Zhang
Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Wuhan University), Ministry of Education, and Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China; State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Beijing 10080, China.
Tao
T
Bao
Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Wuhan University), Ministry of Education, and Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China; State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Beijing 10080, China. Electronic address: chenzl@whu.edu.cn.
Zilin
Z
Chen
D000327:Adsorption; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D007093:Imidazoles / Q000737:chemistry*; D007211:Indoles / Q000737:chemistry*; D007659:Ketones / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D011108:Polymers / Q000737:chemistry*; D016062:Porosity; D052617:Solid Phase Microextraction / Q000379:methods*; D017641:Zeolites / Q000737:chemistry*
D007093:Imidazoles; D007211:Indoles; D007659:Ketones; D011084:Polycyclic Aromatic Hydrocarbons; D011108:Polymers; C568283:polydopamine; D017641:Zeolites
HPLC; Polycyclic aromatic hydrocarbons; Polydopamine; Solid-phase microextraction; Zeolitic imidazolate framework-8