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Preparation method of dumbbell-shaped molecular imprinting stirring rod
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A molecular imprinting and stirring rod technology, applied in the field of analysis and detection, can solve problems such as interference and lack of selectivity, and achieve the effects of increasing binding sites, speeding up analysis, and reducing thickness
Inactive Publication Date: 2013-05-22
NANJING MEDICAL UNIV
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Problems solved by technology
Traditional PDMS coatings are only suitable for non-polar and low-polarity analytes, lack of selectivity, and will suffer serious interference in complex sample matrices
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Abstract
The invention discloses a preparation method of a dumbbell-shaped molecular imprinting stirring rod. The method comprises the following steps of: dipping on the dumbbell-shaped stirring rod in alkali and acid in turn for carrying out activation and silanization reaction; further dipping the dumbbell-shaped stirring rod into a trimethylolpropane tricrylic acid ester solution to carry out grafting reaction; putting a template molecule vardenafil and a functional monomer into a pore-foaming agent for prepolymerization, subsequently adding a cross-linking agent and an initiator and putting into the grafted dumbbell-shaped stirring rod to polymerize; repeating the polymerization reaction of the dumbbell-shaped stirring rod, further aging, and finally washing the template molecules so as to obtain the dumbbell-shaped molecular imprinting stirring rod. The stirring rod prepared by using the preparation method is combined with a chromatograph and can be applied to rapid separation and enrichment of nafil compounds in complex matrixes such as food, medicines and health-care products, so that accurate detection on a sample, with high selectivity and high sensitivity, is achieved.
Description
technical field [0001] The invention belongs to the technical field of analysis and detection, and in particular relates to a preparation method of a dumbbell-shaped molecularly imprinted stirring rod using vardenafil as a template molecule. Background technique [0002] With the improvement of living standards, people's requirements for health are getting higher and higher, so the safety of health care products has received extensive attention. The purpose of purchasing health products is to strengthen the body and supplement the various nutrients that the human body lacks. However, in order to highlight the efficacy and attract consumers, many health products randomly add chemicals that have quick results in a short period of time but have serious side effects. Especially health food. In order to achieve immediate results, kidney and yang health care products often add some chemicals for the treatment of male sexual dysfunction, such as sildenafil citrate, vardenafil, tad...
Claims
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