Molecularly imprinted technique-flow injection-molecularl fluorometry detect bisphenol A in water

HE Qin,YE Zhi-xiang,WU Xue-feng,YUAN Wei (College of Resources and Environment,Chengdu University of Information Technology,Chengdu 610225,China)  

Using Bisphenol A(BPA) as the template,acrylamide as monomers,Pentaerythritol Triacrylate PETA as crosslinking agent,we synthesized MIPM in aquosity system with suspension polymerization,on which surface there are some holes.The absorbance of MIPM to hydroquinone will no longer increased after 110 minutes.it means that it reaches the saturation which were 34.38 μmol·L-1.The separate genes of MIPM was 22.88 with phenol as competitiors;The MIPM had the better effect of adsorption and selectivity.Using BPA-MIPM as molecule recognizates,Based on the enhancing effect of β-cyclodextrin on the fluorescence from BPA in acidic solution,we set up a new method which was molecular imprinted technique-flow injection-chemoluminescence analysis to detect hydroquinone.The result shows that the range of hydroquinone concentration from 0.1 μg·L-1 to 100 μg·L-1 with adsorbed by MIPM is linearly dependent,which relativity coefficient is 0.9993and the relative standard deviation is 0.79%(20 μg·L-1,n=11),the detection limit is 0.08 μg·L-1.Using the method to detecting hydroquinone from the water sample,the recoveries of hydroquinone is 98.6%-103.9%,the result is pretty good.

【Key Words】： molecular imprinted polymer microspheres(MIPM) bisphenol A suspension polymerization adsorption time separate genes molecular fluorescence β-cyclodextrin
【CateGory Index】： X832;O657.3

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