Director Liu Su introduced in detail the characteristics of GB 2763-202 1 National Standard for Pesticide Residues in Food Safety: the new standard includes 564 kinds of pesticides (428 registered pesticides in China, 49 banned pesticides, 87 unregistered pesticides banned in China, and 44 low-risk pesticides exempted from setting a limited amount) and 548 limited-value pesticides. The maximum allowable residue limit value is 10092.
At present, 7 10 pesticides are registered in China, 46 pesticides are banned, and 32 pesticides are partially banned.
Compared with the 20 19 version, the 202 1 version standard
2,4 drops of butyric acid 1 pesticide were added.
Correspondingly increase 1343 restrictions, among which 42 pesticides have been registered and approved in China; 39 species are not registered and approved in China.
2. * * * increased the maximum residue of 2985 pesticide.
The limit standards for vegetables and fruits increased by 974 and 6 17 respectively, accounting for 32.6% and 20.7% of the total increase respectively. The quota of vegetables and fruits is 57 1 1, accounting for 56.6% of the total quota.
3. The food group limit increased by 1453 items, accounting for 48.7% of the total increase.
The limit value is set according to the food group, so that some crops without the limit value can also be judged according to the food group category, which expands the application scope of the standard, especially for banned pesticides, and the limit value is set according to the food group, which makes the banned pesticides have a judgment basis and makes up for the situation that there is no judgment basis for banned pesticides. This is the biggest feature of 202 1 version.
For example, version 20 19 of pesticide chlorpyrifos, standard vegetables are specified according to specific vegetables, such as eggplant and ordinary Chinese cabbage.
In the 202 1 version of the standard, it is changed to be prepared according to food groups, such as solanaceous vegetables and leafy vegetables.
There is no limit of chlorpyrifos in eggplant version 20 19, and it is impossible to judge if it is detected. However, in the 202 1 version, the limited value of solanaceous vegetables is 0.02mg/kg, and eggplant belongs to solanaceous fruits, so we can judge eggplant according to the limited value of solanaceous fruits in the food group.
According to the announcement 1490 issued by the Ministry of Agriculture and Rural Affairs, Grain Group classifies individual crops according to crop classification, such as tomatoes belonging to eggplant.
Other agricultural products and foods, such as livestock and poultry products, are classified according to major categories. The food group is mainly composed of vegetables and fruits, because there are too many kinds of vegetables and fruits, so it is unrealistic to set a limit if there is one-to-one correspondence.
In the scope of GB 2763-202 1, it is stipulated that "if the maximum residue limit of a pesticide is applicable to a certain food category, all foods under that food category will be used unless there are special provisions".
When testing, if the pesticide limit value is not detected, but the food category is limited, it can be judged according to the food category limit value.
For example, in GB 2763, there is no limit to the detection of cyazofamid on zucchini, but the limit value on melons and fruits is 0.09mg/kg. Because zucchini belongs to melons and fruits, we can judge zucchini according to the limited value of melons and fruits.
If the limit value of pesticides is not detected at the time of testing, and there is no limit value of food in GB 2763, but the crops corresponding to food are limited, it cannot be extrapolated according to food. For example, carbendazim was detected in loofah, and its limit was not stipulated in GB 2763, but it was stipulated in cucumber, zucchini and bitter gourd. Although loofah belongs to fruits and vegetables according to food groups, it cannot be judged by cucumber, zucchini and bitter gourd.
For example, dinotefuran is detected in tomatoes, and its limit is not stipulated in GB 2763, but it is stipulated in eggplant vegetables that its limit is 0.5mg/kg. Because tomatoes belong to solanaceous vegetables, tomatoes can be judged according to the limited value of solanaceous vegetables.
There are many such cases in GB 2763, and it is necessary to determine the food group classification of crops before judging.
4. It is forbidden to use the newly revised pesticide limit to achieve full coverage of the corresponding food categories. In principle, the limit value is set according to the quantitative limit of the detection method standard. The quantitative limit of the standard method for pesticide residue detection is generally 0.0 1mg/kg-0.05mg/kg. The GB 23200 series standards only stipulate the quantitative limit of detection methods, and there is no method detection limit.
5. The maximum residue limits of 194 pesticides in the original standard were revised.
6. The limit of small varieties has increased significantly, and 589 limit standards for characteristic small crops such as ginseng, medlar and bayberry have been formulated.
7. 792 limit standards for 29 banned pesticides such as methamidophos and 345 limit standards for 20 restricted pesticides such as chlorpyrifos were formulated.
8. Seven test method standards were added and two test method standards were revised, totaling 194 test methods.
9. The definition of 12 pesticide residue was revised.
Use GB 2763-202 1
The standard GB 2763-202 1 was released on March 3, 20021and took effect on September 3. The use of standard judgment time should start from September 3. Because the production of agricultural products has a certain cycle, the production date of agricultural products is before September 3, such as sowing in June and harvesting on September 4, so we should use new standards to judge products.
The six-month period from the release to the implementation of the new standard is called the buffer period, during which production should be carried out according to the indicators stipulated in the new standard.
1. When pesticide residues contain metabolites, isomers and enantiomers, and they are not represented by a certain compound, the test results shall be reported according to GB-2763.
2. If there are metabolites in pesticide residue parameters and they are expressed by compounds, the test results should be reported according to the expressed compounds.
3. If the remainder is the sum of several kinds, the result is direct addition.
4. If the residue is the sum of several kinds, but it is expressed by one of the compounds, the other residue should be converted into the amount of one compound according to the molecular weight, and then added.
5. If the remainder is isomeric, directly add the isomeric result.
6. At present, the method specified in GB2763 cannot distinguish chiral pesticides (enantiomers) from the total detected amount.
7. For pesticides with metabolites, if one of the quantitative limits of each component exceeds the limit value, it is judged that the pesticide exceeds the standard.
For example, the residue of phorate is the sum of phorate, phorate sulfone and phorate sulfoxide, and the limit value of vegetables and fruits is 0.0 1mg/kg in terms of phorate. The actual test results of the three components are all less than 0.0 1mg/kg, and the test results are not detected (not exceeding the standard). If the result of one of the components is greater than 0.0 1mg/kg, it is judged that the pesticide exceeds the standard.