This standard specifies the determination method of propanil residue in rice. This standard is applicable to the determination of propanil residue in rice. The detection limit of this method is 0.002ng. When 10.0 ng of rice is taken, the minimum detection concentration of the method is 4×10 GB/T 5009.177-2003 Determination of propanil residue in rice GB/T5009.177-2003 Standard download decompression password: www.bzxz.net

ICS 67. 040
National Standard of the People's Republic of China
GB/T 5009.177—2003
Determlnation of prupanll residues in rice
Determlnation of prupanll residues in rice2003-08-11Promulgated
Ministry of Health of the People's Republic of China
Standardization Administration of the People's Republic of China
2004-01-01Complete
This standard was proposed and coordinated by the Ministry of Health of the People's Republic of China. The Ministry of Agriculture and Rural Affairs of Nanjing University of Science and Technology and the Food Hygiene Clinical Inspection Institute of the Ministry of Health were responsible for drafting this standard. The co-authors of this standard are Li Yuyue, Liu Yunming, Mai Qibin, Sun Meiling and Zhang Tang. GB/T5009.177—2003
GR/T 5009. 177—2003
Ring, discard the pre-added liquid. Transfer the above-mentioned modified liquid to the top of the column, and when the liquid surface enters the filler, use 30ml of mixed liquid (3.3) to elute the column several times, and collect the eluted liquid. Add 2ml of mixed liquid (3.3) to the column to be tested. 5.3 Gas chromatograph parts
Chromatography: 2.1m×3mm (id glass column, point filling 1b%0V-17+1.380V-21n affinity: Chrmnrh.W4WMcS80日·~100月):
Free delivery surface: 2
Vaporization chamber temperature: 25C:
Detection temperature: 250%:
Carrier gas oxygen (pure 99394)
Flow rate: 50 mL/ min.
5.4 Determination
Use the standard reserve micro-dilution (3.3) to dilute to 0.0.5, 1.0.2.U, 5.U, 10.0, 30.0/mJ., inject 1L of each sample, measure the retention time and peak area, repeat 3 times for each step, and take the average value of the peak area. Calculate the linear regression equation based on the content of the desired substance against the peak area. At the same time, take 1 sample of the purified sugar sample and substitute the peak product into the regression equation to calculate the corresponding content of the sample. In the above chromatographic case, the retention time of the substance is 8.21, and the result
6. 1 Calculation
The residual content of the substance in the sample is calculated by the following formula. X-AXeXVxV
Formula+:
X—amount of ether in the sample, in mg/kg; A—sample ether concentration;
standard sample mass concentration, in microliter (/ml);
standard sample concentration, in microliter (1.) sample volume, in milliliter (mL);
standard sample volume, in microliter (2.)
sample mass, in grams).
6. 2 The absolute difference between the two independent results obtained under the condition of precision measurement should not exceed 5 points of the arithmetic mean. 45f
Gas chromatographic color rangebzxz.net
Standard sample concentration
Figure 2 Sample spike recovery chromatogram
GA/T 5009,177—2003
Figure 3 Sample color enhancement diagram
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