This standard specifies the determination method of butachlor residues in rice. This standard is applicable to the determination of butachlor residues in rice. The detection limit of this standard is 0.03ng. The linear range is 1.5ng～15ng. GB/T 5009.164-2003 Determination of butachlor residues in rice GB/T5009.164-2003 Standard download decompression password: www.bzxz.net

3CS.67.040
National Standard of the People's Republic of China
GB/T5009.164——2003
Determination of butachlor residues in rice
Issued on August 11, 2003
Ministry of Health of the People's Republic of China
National Standards Administration of China
Implementation on January 1, 2004
This standard was proposed by the Ministry of Health of the People's Republic of China and is the responsible unit for the standard, namely, Xinhui Academy of Medical Sciences, Jiang Shihei and Lu Xiujing. B/T5009.164--2003
GT5009.1692003
Butachlor (ULarhlar), Chinese name: Met-Cate, Met-Cate, trade name: Mazhcte, is a low-toxicity single agent. The standard for the amount of butachlor residue in rice has been formulated, and the limit of butachlor residue in rice is 0.5rg/g. This standard is applicable to the analysis of the amount of butachlor residue in rice using processed products made from butachlor. 1. Determination of butachlor residue in rice
This standard specifies the determination and method of butachlor residue in rice. This standard is used for the determination of butachlor residue in rice: The detection method of this standard: C.33.
Linear range: 1.5ng~15.bZxz.net
2 Principle
GB/T 5009.164—2003
After the oxadiazole in the sample is extracted with ethylene glycol, it is purified by neutral alumina and determined by gas chromatograph with electron capture detector. The external standard method is used for quantification.
3 Analysis
3.1 1% ethylene is evaporated and 68% ethylene is collected. It does not contain dry components after chromatographic analysis. 3.2 Neutral aluminum, take a layer of 139 days to 230 days, activate for 30 days, cool for 31 days, add 1.5 years of water to deactivate, put it in a dry place overnight for use
3.3 Anhydrous sodium: 1 drying for 3 hours, cool it for use, 3.4 Ceite 545: 80~-120 mesh
3.5 Remove the necessary phase, put the absorbent cotton into Soxhlet to take the solution: such as ketone-right oil series (4+S6), put it in a water bath for 5-throwing, filter it and dry it naturally for use.
3.6 Butachlor standard, use no oil butachlor.
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