自制納米粒子載體結(jié)合無(wú)標(biāo)記適體傳感器化學(xué)發(fā)光檢測(cè)應(yīng)用
[Abstract]:The content of contaminants in food affects human health and life safety, so it is necessary to monitor it directly or indirectly. In order to study the convenient, sensitive, reliable and rapid detection technology, two kinds of nanoparticles were prepared in this paper. The unlabeled aptamer sensor based on self-made nanoparticles was designed and the detection conditions were optimized. Adenosine triphosphate,ATP, chloramphenicol and ochratoxin A (Ochratoxin were detected by chemiluminescence method, which were closely related to food safety. The main contents are as follows: (1) the unlabeled aptamer sensor based on self-made Fe_3O_4 nanoparticles was used to detect ATP. Firstly, Fe_3O_4 nanoparticles were prepared by coprecipitation method, then X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), magnetic properties were used. The composition and particle size were characterized by UV-Vis absorption spectrum and transmission electron microscope. Finally, the unlabeled aptamer sensor was prepared with the particle as the carrier, and the ATP was detected by chemiluminescence method. The results showed that the diameter of the self-made Fe_3O_4 particle was uniform. Strong magnetism, good stability, The ATP detection limit was 6.80 脳 10 ~ (-7) mol/L, and the content of ATP was 3.98 脳 10 ~ (-8) moL; per milliliter of yoghurt. (2) the unlabeled aptamer sensor based on self-made SiO_2 nanoparticles was used to detect chloramphenicol. SiO_2 nanoparticles were prepared by sol-gel method. Subsequently, unlabeled aptamer sensors were prepared on commercial magnetic microspheres and home-made SiO_2 nanoparticles as carriers for the detection of chloramphenicol, the results showed that commercial magnetic microspheres were based on commercial magnetic microspheres. The detection limit of chloramphenicol with self-made SiO_2 nanoparticles was 3.57 脳 10 ~ (-9) mol/L,3.26 脳 10 ~ (-9) mol/L, and was applied to the detection of chloramphenicol in milk samples. The detection rate was between 94.1% and 103.0%. (3) unlabeled aptamer sensors based on home-made Fe_3O_4 nanoparticles and home-made SiO_2 nanoparticles were used to detect the magnetic separation of ATP and OTA in two components. Unlabeled aptamer sensor based on homemade SiO_2 nanoparticles for detection of ATP, unlabeled aptamer sensor based on home-made Fe_3O_4 nanoparticles for OTA; detection the detection limits of ATP and OTA are 1.43 脳 10-7 mol/L and 8.32 脳 10-8 mol/L, respectively. Determination of ATP and OTA in standard beer samples, The detection rate of ATP and OTA was between 94.2% and 101.0%.
【學(xué)位授予單位】:南昌大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類(lèi)號(hào)】:O657.3;TS207.5
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