Shanghai, China - October 17, 2017, Waters Corporation recently released a series of video - 'small P teacher micro classroom', for the modern food industry in pesticide residues, veterinary drug residues and mycotoxin residues, introduced the latest solid Phase extraction technology in the field of food safety applications. The first and second episodes have been published in the official website of Waters, the main focus on animal residue detection and pesticide residue detection.The third episode will be directed against mycotoxins, and will soon be released. For more information, please pay attention to WeChat public: Waters_China.
In the modern food industry, the scientific and regulatory use of pesticides, veterinary drugs can effectively improve the efficiency of food production, and to ensure that the final product related to the residual material in line with national standards, to avoid excessive residues endanger the health of consumers.In addition, the food production and transportation , The storage process, there may be fungal toxins pollution, but also the modern food industry is facing one of the main problems.
Once the consumer has eaten the residue of harmful pesticide residues, animal residues and mycotoxins of the food, ranging from gastrointestinal discomfort, or long-term accumulation of harmful substances, resulting in sub-health; heavy will cause severe damage to all organs, Abnormal, mutagenic, of which antibiotic residues caused by drug-resistant bacteria problem, but also plagued the development of human health technology, a major problem.
In this regard, the United States, the European Union and China and other major regions and countries have introduced a very strict laws and regulations, trying to pesticide, veterinary drugs, mycotoxins and other substances in the strict rules to protect food safety, for the modern food industry ' China, for example, GB 2763-2016 "food safety national standard pesticide pesticide maximum residue limit" in the provisions of the food 433 kinds of pesticides 4140 maximum residue, basically covers China has approved the use of commonly used pesticides and residents of the daily consumption of the main Agricultural products, while the Ministry of Agriculture notice No. 235 stipulates that the maximum residue of veterinary drugs in animal foods, including animal food allowed to use, but do not need to develop the residue limit of 81 kinds of drugs; approved animal food in the maximum residue limit of 92 9 kinds of drugs allowed to be used for treatment, but not in animal foods; prohibited drugs used in animal food can not be detected in 40 kinds.
A series of detection techniques have been applied to the relevant tests, including liquid chromatography mass spectrometry (ICP-MS), which, despite the detection requirements of this series of regulations, has the advantages of high precision of detection, and the combination of liquid chromatography-mass spectrometry There is a high demand, the detection workers in the face of large quantities of food testing, often powerless at the same time, this technology for the sample preparation before the process of cleanliness also have higher requirements, and solid phase extraction, Quechers Method is the most commonly used means of purification.
In the detection of pesticide residues, the detection of different residues in different categories, according to different methods were detected; pesticide residue detection, the commonly used graphitized carbon black in the removal of pigment at the same time, will lead to the detection of planar structural pesticide losses, Can not meet the double demand of recovery and purification; and in the process of fungal detection, the use of immune affinity column purification, then the cost is high, but also faced with purification, recovery, sensitivity can not meet the problem.
In order to solve these problems, only by thoroughly reforming the sample pretreatment process can further improve the efficiency of liquid chromatography mass spectrometry in food safety testing, simplify the operation and reduce the cost of solid phase extraction (Solid Phase Extraction, SPE) is A sample pretreatment technology developed from the mid-1980s was one of the most recent sample preparation methods, developed by the combination of liquid-solid extraction and liquid chromatography.
Solid phase extraction is the most commonly used method is to make the liquid sample solution through the adsorbent, which retain the material tested, and then use the appropriate strength of the solvent washed away impurities, and then with a small amount of solvent to quickly elute the measured substance, so as to achieve rapid separation and purification The purpose of selective adsorption can interfere with impurities, and let the measured material outflow.
The WatersOasis series has a variety of solid phase extraction fillers, which are mainly Oasis PRiME HLB for food residue detection. This is Oasis's new generation of water-expandable filler-based inverting adsorbents. The adsorbent product can easily obtain cleaner samples in less time.
Compared to the traditional method, Oasis PRiME HLB operation is very simple, only need to sample, cleaning and elution three steps, without the traditional method of activation balance, greatly enhance the efficiency, compared to QuECHeRS dSPE operation process can achieve 4 times speed Oasis PRiME HLB can effectively remove impurities such as fats, phospholipids and pigments, taking into account the improvement of the recovery rate of flat structure pesticides, and to achieve the balance of purification and recovery.
The development of modern food industry has been decades of history, whether it is through the breeding of fast slaughter of white feather chickens, or standardized intensive large-scale food production, which help mankind to overcome the millennium 'eat' problem technology Can not be separated from the scientific use of pesticides, veterinary drugs.As a food safety supervision and support technology testing technology, will certainly be able to through its technological innovation to help the food industry in more stringent and efficient supervision of the production of safer food for the food industry ' The