期刊
JOURNAL OF SEPARATION SCIENCE
卷 38, 期 7, 页码 1187-1193出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201400916
关键词
Gas chromatography with mass spectrometry; Metal-organic frameworks; Periodic mesoporous silica; Phenolic compounds; Solid-phase microextraction
A metal-organic framework/periodic mesoporous silica (MOF-5@SBA-15) hybrid material has been prepared by using SBA-15 as a matrix. The prepared MOF-5@SBA-15 hybrid material was then deposited on a stainless-steel wire to obtain the fiber for the solid-phase microextraction of phenolic compounds. Modifications in the metal-organic framework structure have proven to improve the extraction performance of MOF/SBA-15 hybrid materials, compared to pure MOF-5 and SBA-15. Optimum conditions include an extraction temperature of 75 degrees C, a desorption temperature of 260 degrees C, and a salt concentration of 20% w/v. The dynamic linear range and limit of detection range from 0.1-500 and from 0.01-3.12 ng/mL, respectively. The repeatability for one fiber (n = 3), expressed as relative standard deviation, is between 4.3 and 9.6%. The method offers the advantage of being simple to use, rapid, and low cost, the thermal stability of the fiber, and high relative recovery (compared to conventional methods) represent additional attractive features.
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