This standard specifies the method for measuring the residual amount of 666 and DDT in animals (poultry, livestock, fish, earthworms) and plants (grains, fruits, vegetables, tea, lotus roots). This standard is applicable to the analysis of organochlorine pesticide residues in animal samples (poultry, livestock, fish, earthworms) and plant samples (grains, fruits, vegetables, tea, lotus roots). GB/T 14551-2003 Gas chromatography method for the determination of 666 and DDT in animals and plants GB/T14551-2003 standard download decompression password: www.bzxz.net

GB/T14551—2003
standard standard for the determination of hexavalent 6-hexadecene by the gas sweep chromatograph method of biomass 13/14551-933 is as follows:
--all the contents of 2.3 preparation of reagents, 3.6 chromatograph and 5.2.3 calibration data in the original standard are expressed in full;
in the 5th step of chromatographic potential measurement, the determination conditions, the filter tower and the capillary tube are also added, and the figures of 6.2.2 rate, 6.2.3 accuracy and 1.2.4 detection limit are all put in Appendix A, and the original precision is expressed by standard sieve difference, and is changed to corresponding standard. The standard A is the material for the determination of hexavalent 6-hexadecene.
The standard is established by the Ministry of Agriculture of the People's Republic of China and the unit responsible for the determination is: Environmental Protection Research Institute of the Ministry of Agriculture. The main drafters of this standard are Huang Shizhong, Liu Nuogan, Ying Yongtao, 1. Qiu Bu, Mai Zhunji, Xu Mingcheng, Ji Zhixiang, and Zhang Keqiang. 1 Scope
Gas chromatography for determination of 666 and DDT in animals and plants
GB/T14551—2003
This standard specifies the method for determination of 688 and DDT residues in animals (poultry, poultry, fish, grass) and plants (grain, fruit, vegetable, tea, essence)
This standard applies to the analysis of organochlorine pesticide residues in animal products (poultry, poultry, fish, grass) and plant products (grain, fruit, vegetable, tea, essence). bzxz.net
2 Normative references
The clauses in the following documents become the clauses of this standard before they are cited in this standard. For the cited documents with a specified date, all the subsequent amendments (excluding other incorrect contents) or sub-editions are not applicable to this standard. However, parties that have reached an agreement with this standard are encouraged to study whether the latest versions of these documents can be used. For the cited documents without a specified date, their extended versions shall apply to this standard. H/117%—18 Determination of organochlorine pesticide residues in food 2 Jiang 397 Pesticide residues in food, standard monitoring technology for pollution in aquatic products 3 Principle
Analysis of hexachlorobenzene and hexachlorobenzene pesticide residues in animal and plant samples shall be carried out by organic solvent extraction, absolute-liquid partition and concentrated sulfur purification or chromatography purification to remove the dry matter, and the chromatographic peaks shall be detected by electron capture detector (CD) for qualitative determination, and external standard method shall be used. 4 Reagents and Materials
4.1 Carrier gas (N, purity 99.%
4.2 Reagents and materials for standard sample collection and analysis. The reagents used are all analytical reagents unless otherwise specified, and the water is distilled water.
4.2.1 Agricultural Standards
-BHCP-BHC, Y-RHC, B.RHIC, PP\-DDE, (.P'-DDYT, 1. PDI>.P. P\DDT, pure E is SS.(%--99.0%:
4.2.1.1 Preparation of pesticide standard solution: accurately weigh 1 μg of each pesticide standard sample (accurate to ±0.0001>, add isooctane (3-BHC is first dissolved with a small amount of benzene). Dilute to the specified concentration in a 103mL container bottle and store in ice. 4.2.1.2 Preparation of pesticide standard intermediate solution: accurately measure eight kinds of pesticide standard solutions, transfer them to 100mL container bottles, and sieve with isooctane. The volume ratio of the pesticide standard solution is: V. EFC V-EHC 1 VI-M : V+BHC : YR, P-TCE 1 Va 2-MYr VP-ImV.-113.113.F.53 (applicable to replacement and storage) 4.2.1.3 Preparation of standard working solution of pesticide sample: according to the sensitivity and film requirements of the test, use stearic acid or hexane to make pesticide standard solution, prepare several concentrations of standard working solution, and discard it at 4 °C. 4.2.2 Normally calcined CH) at 67 °C--65 °C || tt || 4.2.3 White oil ether : boiling temperature 60℃~50℃, oxygen. 4.2.4 Isooctane (C,H.).
4.2.5 Propylene (CTI.COCH,), distilled.
4.2.6 Its (C,H): high purity.
GB/T14551—2003
4.2.7 Aldehyde H.: high purity.
4.2.8 Fermented acid
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