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Shandong pesticide residue rapid screening mass spectrometry mobile platform has made an important breakthrough
[ China Instrument Network Instrument Development ] On the morning of July 9, 2018, the “Peticide Residue Rapid Screening Mass Spectrometry Mobile Platform Launch Conference and the Unveiling Ceremony of the Joint Research and Development Laboratory for Rapid Testing of Agricultural Product Risk Factors†was held at the Shandong Academy of Agricultural Sciences.
As a major agricultural province, Shandong has a very important significance in promoting agricultural standardization production and full-scale supervision, and comprehensively improving the quality and safety of food in Shandong Province. However, traditional food testing methods are often slow, complicated, and very low in detection efficiency.
Taking apple as an example, the traditional detection steps of fruit and vegetable drug residues are generally required to be carried out by "crushing the apple - homogenate - adding solvent extraction - the extract is purified by a solid phase extraction column. After the purification liquid is concentrated and constant volume, the sediment is removed by a filtering device. After entering the liquid chromatograph or gas chromatograph and the chromatographic-mass spectrometer for detection - the results are issued. In order to ensure the accuracy of the test results, the above process takes at least 1-2 days to complete. In addition, the completion of the above steps requires a full set of testing equipment, including liquid phase, gas chromatograph and mass spectrometer, which is expensive and costly, and needs to be completed in a professional laboratory and requires professional operations.
Because the procedure is complicated and the process is cumbersome, the relevant government departments can only take the sampling method to complete the detection of pesticide residues in the laboratory, and cannot perform rapid detection on the spot.
The Institute of Agricultural Sciences of Shandong Academy of Agricultural Sciences adheres to the problem orientation, integrates technical resources of Lutai cooperation, and is committed to the research and development of weak links in the quality and safety of agricultural products. The rapid screening technology for pesticide residues in fruits and vegetables of Shandong Academy of Agricultural Sciences and Sun Yat-sen University of Taiwan Prof. Xie Jiantai's “thermal desorption electrospray ion source technology†achieved perfect integration and successfully developed a rapid screening and mass spectrometry mobile platform for pesticide residues.
The platform solves a series of problems such as long traditional detection period, multiple types of pesticide residues, low sampling rate, high false positive rate of existing fast screening technology, limited detection types, and difficulty in meeting market demands. Comprehensive supervision provides a feasible plan, provides important technical support for the implementation of the “access and admission†system for the fruit and vegetable products market, and realizes the scientific supervision of agricultural product quality and safety. It will also effectively promote the rapid improvement of the quality of domestic agricultural product quality screening.
At the same time, the pesticide residue rapid screening mass spectrometry mobile platform realized the “moving†of the precision laboratory into the vehicle, combined with the improved mass spectrometer, to truly achieve the purpose of on-site inspection. It can meet the comprehensive, real-time, fast and effective requirements of agricultural product risk prevention and control, and improve the quality of supervision; at the same time, it can greatly alleviate the pressure of existing testing units' fixed laboratories, shorten the testing cycle and reduce the workload. Realize real-time fixed-point detection, rapid screening, emergency pre-inspection and law enforcement inspection anytime, anywhere.
It is understood that the new technology does not require pre-treatment, eliminating the need for extraction and purification, allowing the sample to directly enter the mass spectrometer, and more than 200 pesticide residues can be detected in 30 seconds.
In addition, in this meeting, the “Joint Laboratory for Rapid Testing of New Technologies for Agricultural Products Risk Factor†successfully signed the agreement and listed it.
The "New in-situ ionization mass spectrometry technology" owned by the "Joint Laboratory for Rapid Testing of New Technologies for Agricultural Products Risk Factor" is an internationally advanced and pioneered in situ mass spectrometry technology. High-capacity pesticide residue detection, trace-level accurate detection, high-throughput high-speed detection and other technical advantages, combined with laboratory detection accuracy, trace advantages and equipment mobility, high-throughput fast screening and on-site screening It is an innovative solution to the current problem of pesticide residue prevention and control. It is also a model case and model for Shandong Province in the field of agricultural product quality and safety innovation and the transformation of old and new kinetic energy.
(Source: Qilu, Phoenix, Science and Technology Daily)