Pesticide Maximum Residue Limit Formulation Procedure and GB 2763 Limit Standard

(1) General procedures for the formulation of my country's maximum residue limits

1.
Determine the standard residual test median value (STMR) and maximum residual value (HR) in accordance with the requirements of "Pesticide Registration Information Regulations" and "Pesticide Residue Test Guidelines" (NY/T788), under the conditions of good agricultural practices for pesticide use Standard residual test, the standard residual test median value (STMR) and maximum residual value (HR) are determined according to the results of the residual test
.

2.
Determine the allowable daily intake (ADI) and/or acute reference dose (ARfD) based on the results of toxicological kinetics and toxicology evaluation, and formulate the daily allowable intake
.
For pesticides with acute toxic effects, an acute reference dose is established

3.
It is recommended to determine the maximum residue level of pesticides based on the standardized residue test data
.
Based on China's dietary consumption data, estimate daily intake or short-term dietary intake, conduct dietary intake risk assessment, and recommend maximum residue limits (MRL) for pesticides in national food safety standards

For the recommended maximum residue limit, one significant digit is reserved for those below 10 mg/kg, two significant digits are reserved for those above 10 mg/kg and below 99 mg/kg, and those above 100 mg/kg are expressed as multiples of 10
.
The maximum residue limit is usually set to 0.

For example, carbendazim limited in the leek is 2mg / kg; Avi bacteria limited in leek element is 0.
05mg / kg; carbofuran limited in rainbow beans was 0.
02mg / kg
.

(2) "Maximum Residue Limits of Pesticides in Foods" (GB2763-2016) standards and new content

GB 2763 is China's compulsory food safety national standard, and it is the basis for quality inspection agencies to determine pesticide residues in food (including agricultural products)
.
The latest version of GB2763 is 2016 version

The 2016 version of the standard stipulates 4140 maximum residue limits for 2,4-drops and other 433 pesticides in 284 (category) foods, with the following characteristics:

1.
The new version of the food category has expanded the standards for 284 (categories) of food residues for a variety of pesticides, covering vegetables, fruits, grains, oils and fats, sugars, beverages, seasonings, nuts, edible fungi , Mammalian meat, eggs, poultry offal and meat and other 12 categories of crops or products
.
In addition to conventional grains, vegetables, and fruits, the pesticide residue limit values ​​for primary processed products such as juice, preserved fruits, and dried fruits have been formulated for the first time, basically covering the types of foods that people often consume

2.
Covering the varieties of pesticides commonly used in agricultural production In order to prevent and control various pests and diseases on crop growth, there are about 350 pesticide varieties frequently used in the production of different crops in different regions of China, and the new version of the standard has established maximum residue limits for 387 pesticides.
The standard basically covers commonly used pesticide varieties, and the coverage will be further expanded in the future
.

3.
Focus on increasing the limit standards for fresh agricultural products such as vegetables, fruits, tea, etc.
Aiming at the problem of excessive pesticide residues in fresh agricultural products such as vegetables, fruits, tea, etc.
, frequent and easy to occur, the new version of the standard focuses on the limit of pesticide residues in fresh agricultural products.
, Established 2495 limited standards for 115 vegetable species (categories) and 85 fruit species (categories), an increase of 904 items from the 2012 version and 490 items from the 2014 version
.
Compared with the 2012 version, the new limit for vegetables and fruits accounted for 67% of the total limit.

4.
The new version of the standard is basically in line with the relevant international standards.
Among the newly issued standards, the International Codex Alimentarius Commission has established 1999 limited standards
.
Among them, 1811 national standards are equal to or stricter than the International Codex Alimentarius standards, accounting for 90.

In order to ensure the scientificity and practicability of the standards, the pesticide residue limit standards are based on pesticide toxicology data, China's pesticide residue field test data, China's residents' dietary consumption data and domestic agricultural product market monitoring data, and the standards are formulated after scientific risk assessment.

.
During the formulation process, the opinions of the general public, agricultural product production and import and export enterprises, relevant industry associations and relevant industry departments have also been extensively solicited

On December 18, 2016, the National Health and Family Planning Commission, the Ministry of Agriculture, and the State Food and Drug Administration jointly announced that 107 food safety countries including the National Food Safety Standard Maximum Residue Limits for Pesticides in Food (GB2763-2016) Standards, of which GB2763-2016 is a general limit standard, and the remaining 106 items are pesticide residue testing method standards
.

So what is the difference between the latest version of GB2763-2016 (hereinafter referred to as the 2016 version) and GB2763-2014 (hereinafter referred to as the 2014 version)?

(1) the original standard pyraflufen , flucarbazone , imazapic , fluopicolide , carbofuran, triadimefon and triadimenol define seven kinds of pesticide residues, grass fast enemy 5 The daily allowable intake of three pesticides has been verified and revised; the ADI values ​​of five pesticides including Diquat and Tricyclic Tin have been revised
.

(2) 46 pesticides including 2,4-D isooctyl ester have been added; 490 pesticide maximum residue limit standards have been added
.
After comparison, the 46 new pesticides added in the 2016 version are: 2,4-D isooctyl ester, 2-methyl 4-chloroisooctyl ester, saflufenacil, mefentrazone, metafentrazone, and propylthioamide.
Bendazim, pyrethrin, Tetrachloride, Polyoxin, Dinotefuran, Fluopyram, Sodium Nitrophenate, Sulfentrazone, Jinggangmycin, Tritex, Matrine, Tribenuron , dense piperidine saflufenacil, prometryn , fluthiacet-methyl , metaflumizone, JS399 , alkynyl benzoyl alachlor , clothianidin, fentin acetate , triclopyr , molluscicides amine Ethanolamine salt, saraphos, lufenuron, tebufenac, calcium titanate, penoxsulam, allyl thiazole , ketim , uniconazole, octoxystrobin, bromoxynil octoyl , cyantraniliprole , pyrametostrobin , pinoxaden, pyridine oxazole bacteria, butadiene-vinyl pyridine, morpholine, oxazole dichlormid, mepiquat shop, daminozide, oxazole mepanipyrim
.

(3) Add 11 test method standards, delete 10 test method standards, and change 28 test method standards
.

Added GB 23200.
32, GB 23200.
37, GB 23200.
46, GB 23200.
51, GB 23200.
54, GB 23200.
69, GB 23200.
70, GB 23200.
74, SN/T 0162, SN/T 0931, SN/T 222911 test method standards; deleted SN 0279, SN 0340, SN 0345, SN 0492, SN 0499, SN 0500, SN 0584, SN 0597, SN 0649, SN/T 071110 test method standards; the changed 28 test method standards are mainly to change some of the standards to GB23200 series food safety National standards, while correcting errors, remove the redundant "beast" in the standard name
.

(4) The English common names of 8 pesticides including propiconazole have been revised
.
The eight modified pesticides are propiconazole, hexahexahexa, oxystrobin, chloroxystrobin, dimehypo, tetrachlorophthalide, fluroxypyr , and fluroxypyr isooctyl
.

(5) The limit values ​​of mefenacet, methenamide and senbium were revised from temporary limits to official limits
.

(6) The normative appendix A has been revised, adding the names of three foods including dried vegetables, and modifying the name of one crop
.
The comparison of the contents of Appendix A found the following changes:

① Amend the informative appendix to a normative appendix; ② Amend "Laidou" in vegetables (beans) to "Phaseolus vulgaris";

③ "Jujube" in fruits (stone fruits) was changed to "Jujube (fresh)", and "green plum" was added; ④ "Dewberry" in fruits (berry and other small fruits) was changed to "Dewberry (including wave) Senberry and Loganberry)”; ⑤ "Jujube (dried)" is added to dried fruits; ⑥ "Hericium" in edible fungus is changed to "Hericium"; ⑦Food category name is modified: "Drink" is modified As "beverage category"; ③The category of "dried vegetable food" has been added
.

(7) The normative Appendix B "List of Pesticides Exempted from the Establishment of Maximum Residue Limit Standards in Foods" has been added
.
This is the first time that China has issued a list of pesticides exempted from setting limits, including 33 pesticides such as Bacillus thuringiensis
.

Related Links: Pesticide Residues and Related Concepts