title: Synthesis and characterization of titania hollow fiber and its application to the microextraction of trace metals.
abstract: A titania hollow fiber membrane was successfully synthesized in a macro range via a template method coupled with a sol-gel process. Thermal gravimetric and differential thermal analysis (TG-DTA) was employed to study the effect of heat treatment on the synthesized hollow fiber, and the crystal forms of the titania hollow fiber membranes at different temperatures were studied by X-ray diffraction (XRD). The pore structure of the prepared titania hollow fiber was characterized by scanning electron micrograph (SEM) and nitrogen adsorption/desorption measurements. The prepared titania hollow fiber membrane was explored as a new adsorption material for trace metals for the first time and a new method of titania hollow fiber membrane solid phase microextraction (MSPME) online coupled to inductively coupled plasma mass spectrometry (ICP-MS) was developed for the determination of trace amount of Cd, Co, V and Ni in human serum samples. In order to validate the developed method, two certified reference materials of NIES.No.10-b rice flour and BCR No.184 bovine muscle were analyzed and the determined values were in good agreement with the certified values.
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan, 430072, China.
authors.forename: Chaozhang
authors.initials: C
authors.lastname: Huang
authors.forename: Bin
authors.initials: B
authors.lastname: Hu
mesh_terms: D000327:Adsorption; D000818:Animals; D002104:Cadmium / Q000097:blood / Q000302:isolation & purification; D002417:Cattle; D003035:Cobalt / Q000097:blood / Q000302:isolation & purification; D006801:Humans; D006863:Hydrogen-Ion Concentration; D013058:Mass Spectrometry / Q000379:methods*; D008670:Metals / Q000097:blood* / Q000302:isolation & purification; D009532:Nickel / Q000097:blood / Q000302:isolation & purification; D012275:Oryza / Q000737:chemistry; D052617:Solid Phase Microextraction / Q000379:methods*; D013818:Thermogravimetry; D014025:Titanium / Q000737:chemistry*; D014639:Vanadium / Q000097:blood / Q000302:isolation & purification
chemical_list: D008670:Metals; D002104:Cadmium; D014639:Vanadium; C009495:titanium dioxide; D003035:Cobalt; D009532:Nickel; D014025:Titanium