Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Application of ultraviolet rays to degradation of pyridaben residues in oolong tea

A technology of ultraviolet light and oolong tea, which is applied in tea treatment before extraction, etc., can solve the problem of excessive pyridaben pesticide residues, achieve the effect of reducing the residual content of pyridaben, ensuring food safety, and achieving sterilization

Pending Publication Date: 2020-03-27
JILIN UNIV
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an application of ultraviolet light in degrading pyridaben residues in oolong tea in order to solve the problem of excessive pyridaben pesticide residues in oolong tea at the present stage

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Application of ultraviolet rays to degradation of pyridaben residues in oolong tea
  • Application of ultraviolet rays to degradation of pyridaben residues in oolong tea
  • Application of ultraviolet rays to degradation of pyridaben residues in oolong tea

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment one: reduce the processing method of pyridaben content in oolong tea, comprise the following steps:

[0014] 1. Weigh the standard product of pyridaben, dissolve it in toluene to obtain the standard solution of pyridaben, and the concentration range is 0.1mg / kg-1000.0mg / kg.

[0015] 2. Mix the standard solution of pyridaben with oolong tea, so that the content of pyridaben in the spiked sample of oolong tea is 5.00 mg / kg.

[0016] 3. Apply the degradation method to the oolong tea spiked sample: set the wavelength of ultraviolet light (240-260nm), the time is 60min, start the ultraviolet irradiation device, and start the ultraviolet irradiation to process the oolong tea spiked sample; after the ultraviolet irradiation is finished, take out the treated oolong tea sample.

[0017] 4. Detection and extraction method of pyridaben content in oolong tea samples: Accurately weigh 5.00g of oolong tea samples, add 15mL of acetonitrile, extract homogeneously at 15000r / ...

Embodiment 2

[0037] Embodiment two: reduce the processing method of pyridaben content in oolong tea, comprise the following steps:

[0038] 1. Weigh the standard product of pyridaben, dissolve it in toluene to obtain the standard solution of pyridaben, and the concentration range is 0.1mg / kg-1000.0mg / kg.

[0039] 2. Mix the standard solution of pyridaben with oolong tea, so that the content of pyridaben in the spiked sample of oolong tea is 5.00 mg / kg.

[0040] 3. Apply the degradation method to the oolong tea spiked sample: set the wavelength of ultraviolet light (240-260nm) for 120 minutes, start the ultraviolet irradiation device, and start the ultraviolet irradiation treatment; after the ultraviolet irradiation is completed, take out the processed oolong tea sample.

[0041] 4. Detection and extraction method of pyridaben content in oolong tea samples: Accurately weigh 5.00g of oolong tea samples, add 15mL of acetonitrile, extract homogeneously at 15000r / min for 1min, centrifuge at 4200r...

Embodiment 3

[0061] Embodiment three: reduce the processing method of pyridaben content in oolong tea, comprise the following steps:

[0062] 1. Weigh the standard product of pyridaben, dissolve it in toluene to obtain the standard solution of pyridaben, the concentration range is 0.1mg / kg-1000.0mg / kg;

[0063] 2. Mix the pyridaben standard solution with oolong tea, so that the content of pyridaben in the oolong tea spiked sample is 5.00 mg / kg;

[0064] 3. Apply the degradation method to the oolong tea spiked sample: set the wavelength of ultraviolet light (240-260nm), the time is 60min, start the ultraviolet irradiation device, and start the ultraviolet irradiation to process the oolong tea spiked sample; after the ultraviolet irradiation is finished, take out the treated oolong tea sample;

[0065] 4. Detection and extraction method of pyridaben content in oolong tea samples: Accurately weigh 5.00g of oolong tea samples, add 15mL of acetonitrile, extract homogeneously at 15000r / min for ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Wavelengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses an application of ultraviolet rays to degradation of pyridaben residues in oolong tea. The wave length of the ultraviolet rays is 240-260nm, the irradiation time of the ultraviolet rays is 60-360min, the content of Pyridaben residues can be notably reduced, and various physical and chemical indexes of the oolong tea are not influenced. A degradation method for degrading thepyridaben in the oolong tea by the ultraviolet rays comprises the steps of preparing a toluene standard product of the Pyridaben, and performing mixing with the oolong tea; setting the wave length and the time of the ultraviolet rays, starting an ultraviolet irradiation device, and starting ultraviolet irradiation to treat oolong tea labeled samples; and after ultraviolet irradiation is finished,taking out treated oolong tea, measuring the Pyridaben content, moisture content, total ash, and water extraction content before and after the degradation method is applied. The application has the beneficial effects of being high in practical application and promotion valve, the physical and chemical indexes in the oolong tea are not influenced, and besides, the sterilizing effect is achieved. The application can be promoted in production of the tea leaves, and has favorable application prospects.

Description

technical field [0001] The invention relates to an application of ultraviolet light, in particular to an application of ultraviolet light in degrading pyridaben residues in oolong tea. Background technique [0002] At present, tea is an important economic crop and export agricultural product in China. China's tea production ranks first in the world. About two-thirds of the world's population consumes tea beverages. The quality of its products is of great significance to safeguarding human health and promoting trade growth. Oolong tea is one of the six major teas, and its special raw materials, environment, and craftsmanship endow the tea with uniqueness in quality and function. In the process of growing oolong tea raw materials, in order to prevent and control diseases and insect pests, pesticides are inevitably used. Pesticide residues have become the main pollution factor of oolong tea, and excessive pesticide residues have become the biggest obstacle restricting the expo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): A23F3/06
CPCA23F3/06
Inventor 徐梦蕾陈成聪高宇史楠
Owner JILIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com