Tea pesticide residues with on-site rapid detection of new methods.

　Reporters recently learned from Huahua Agricultural University, the university's tea department Professor Yan Dejiang team and
National China
Metrology University team, proposed a
tea
organochlorine
posicide residues
to carry out rapid and effective
testing
new method. This method is expected to achieve rapid on-site quantitative testing of tea garden part
national residues
indicators in the field, helping the production
management
department to improve the control level of
fest food safety
in tea production and reduce the
seal food safety risk
of
consumers
The findings were published recently in the Journal of Dangerous Materials, an international journal.
as a popular beverage, quality and safety have attracted much attention, pesticide residues are the most sensitive safety indicators of tea, but also the most stringent risk control projects. At present, the traditional detection methods of tea food safety indicators, such as "gas chromatography-mass spectrometry" and "liquid chromatography-mass spectrometry", because of the complexity of detection methods, long time-consuming, high cost, can not meet the needs of on-site testing or in-place testing, so that the tea industry lacks the risk control means from the source of tea garden.
In order to meet the needs of tea farmers and residues
speed detection
in recent years, yan Dejiang research team and The University of Metrology of China, combined with nanomaterials and spectroscopy technology, through the pesticide residue detection environment in tea, special nanomaterial preparation, fingerprint spectroscopy algorithm, etc. carried out in-depth research, developed a set of new technologies suitable for rapid detection in the tea field. The technique bridges between the organic molecules containing benzene rings between the organic residues of organochlorine, and closes the distance between the free molecule and the Raman spectral nanomaterials to enhance the substrate, thus creating a surface plasma resonance effect and obtaining a fingerprint spectrum of the distinguishable agricultural residues.
team used tea garden comparative drug sampling to further study that the technology program can effectively detect the target agricultural residues. After comparing it with the gas chromatography-mass spectrometrometer, the team concluded that the detection method has good application prospects. The task force plans to carry out interdisciplinary cooperation to further integrate and develop new technologies into related light equipment to serve the food safety of horticultural industries. Liu Zhiwei.