Abstract: The disclosure discloses a high-flux and ultra-sensitive detection dot array enhancement chip, and belongs to the field of food safety detection. In the disclosure, single-layer Au nano-particles are chemically bonded onto a hydrophilic substrate, an Au nano-material is naturally deposited in holes of the chip under an electrostatic adsorption action, and a regular dot array is formed. Au particles distributed in the holes are separated with a particle surfactant (CTAB) to form plasma gaps so as to enhance the self-assemble of Au nano-particles distributed on hot-spots for a long range effect, thereby improving the sensing signal in detection efficiency and sensitivity of the chip.

Abstract: A fermented beverage and a preparation method are disclosed. The method uses ripened fruits and/or vegetables as raw materials. The method includes performing a natural ripening on a fruit and/or a vegetable at 15° C. to 30° C. for 5 days to 10 days to obtain a ripened fruit and/or vegetable; and inoculating lactic acid bacteria into the ripened fruit and/or vegetable, and performing a fermentation for 10 days to 30 days at 15° C. to 30° C. to obtain the fermented beverage. After 23 days of fermentation, the fermented beverage has a total flavonoid content up to 0.5 mg/mL to 2.0 mg/mL, which is beneficial to human health, a pH of 3.2 to 3.8 and a total titratable acidity of up to 12 mg/mL to 18 mg/mL. The fermented beverage requires a short fermentation cycle, which is beneficial to industrial production.

Abstract: The present disclosure belongs to the technical field of analytical chemistry, in particular to synthesis and application of a nanomaterial for removal of patulin (Pat). The present disclosure adopts 2-Oxin as a substitute template, AM as a functional monomer, and synthetic Fe3O4@SiO2@CS-GO magnetic nanoparticles as a carrier, for preparing a magnetic MIP specific for Pat adsorption by surface imprinting. The addition of Fe3O4 makes the finally prepared molecular imprinted adsorbent material magnetic, thereby facilitating separation of a material from a matrix, eliminating complicated operation steps such as filtration and centrifugation, and facilitating recovery of materials.

Abstract: A fermented beverage and a preparation method are disclosed. The method uses ripened fruits and/or vegetables as raw materials. The method includes performing a natural ripening on a fruit and/or a vegetable at 15° C. to 30° C. for 5 days to 10 days to obtain a ripened fruit and/or vegetable; and inoculating lactic acid bacteria into the ripened fruit and/or vegetable, and performing a fermentation for 10 days to 30 days at 15° C. to 30° C. to obtain the fermented beverage. After 23 days of fermentation, the fermented beverage has a total flavonoid content up to 0.5 mg/mL to 2.0 mg/mL, which is beneficial to human health, a pH of 3.2 to 3.8 and a total titratable acidity of up to 12 mg/mL to 18 mg/mL. The fermented beverage requires a short fermentation cycle, which is beneficial to industrial production.

Abstract: The disclosure discloses a high-flux and ultra-sensitive detection dot array enhancement chip, and belongs to the field of food safety detection. In the disclosure, single-layer Au nano-particles are chemically bonded onto a hydrophilic substrate, an Au nano-material is naturally deposited in holes of the chip under an electrostatic adsorption action, and a regular dot array is formed. Au particles distributed in the holes are separated with a particle surfactant (CTAB) to form plasma gaps so as to enhance the self-assemble of Au nano-particles distributed on hot-spots for a long range effect, thereby improving the sensing signal in detection efficiency and sensitivity of the chip.

Abstract: The present disclosure belongs to the technical field of analytical chemistry, in particular to synthesis and application of a nanomaterial for removal of patulin (Pat). The present disclosure adopts 2-Oxin as a substitute template, AM as a functional monomer, and synthetic Fe3O4@SiO2@CS-GO magnetic nanoparticles as a carrier, for preparing a magnetic MIP specific for Pat adsorption by surface imprinting. The addition of Fe3O4 makes the finally prepared molecular imprinted adsorbent material magnetic, thereby facilitating separation of a material from a matrix, eliminating complicated operation steps such as filtration and centrifugation, and facilitating recovery of materials.