GB/T 5009.32-2003 Determination of propyl gallate (PG) in oily esters

This standard specifies the determination method of PG in oils and fats. This standard is applicable to the determination of PG in oils and fats. The detection limit of this method is 50μg. GB/T 5009.32-2003 Determination of propyl gallate (PG) in oils and fats GB/T5009.32-2003 Standard download decompression password: www.bzxz.net

[CS 67.040
National Standard of the People's Republic of ChinabZxz.net
GB/T5009.32—2003
Replaced by CB/T5005.821396
Delermination of propylgallate in oils and fats fats2003-08-11 Issued
Ministry of Health of the People's Republic of China
Standardization Administration of China
Implementation on January 1, 2004
GB/T5009.32—2003
This standard replaces B005.32—1 Determination of Propyl Hydroxide (P) in Fat. Compared with B/T5005.32-1996, the main modifications are as follows: The Chinese name of the standard is restored. The Chinese name of the standard is changed to Note 3: According to GBT20001.4 20C1 Standard Part 4: Chemical Analysis Methods Modify the structure of the source standard
The standard is composed of the following: The Ministry of Health Food Hygiene Inspection Standard. The standard was first issued in 198= and revised for the second time in 2036. 1 Scope
Determination of gallic acid lactone (PG) in fats and oils This standard specifies the determination of PG in fats and oils.
This standard is applicable to the determination of PG in animal fats and oils. The detection limit is 50%.
2 Principle
G13/T 5Q09.32——7003
The essence is cooled by petroleum ether: After the natural extraction of acetic acid, it is replaced by propyl acetate (FG): and ferrous iodide is reacted with ferrous iodide to react with the color package. The absorbance at 54m of the raw liquid is measured and compared with the standard. When the sample is scanned for 1, the minimum concentration is 25mg: kR3 test shot
3.! Run ~.
3.22 Ammonium sulfate solution 100/. and 16,71
3.3 Color developer: weigh 0.08 titanium dioxide (FeS+, HU) and potassium carbonate (KC) and add solution, dilute to 1((ml., use the method. 3.41G bad push energy: accurately take 0.1C PPG into the water and transfer it to 2ccml. Small container. Dissolve in water for a moment. This is a teaching 5U.\gPC.
4 Receiver
Optics
5 Analysis steps
5.1 Sample treatment
Take 10.0 ml of sample solution and transfer it into a separatory bucket. Add acetic acid: 16.8 g/l for 2 min, separate it, add water to 25 ml of acetic acid (6.7 g/l) and extract it twice, add water to the emulsified layer. Wash the sample with 2 ml of water for 15 min each time and add 25 ml of water. Let it stand and shake. Pass the water layer through a 1 ml filter paper and add a small amount of acetaldehyde (more than 100 ml). Add water to the scale. 5.2 Attached to the sample, discard the filter paper, and replace the filter paper with a 1.5 ml colorimetric cup. After the sample is formed into a 1.5 ml colorimetric solution, add 1 ml of colorimetric agent and 4 ml of water. Separately, accurately prepare 3.1.0, 2.0.4.6, F.0, 8.0.10.2mT standard solutions (composed of 0.0, 0.0, 701, 50C, 100.5gC) and add 2.>ml of plasticizer solution (1006/1.), add 24ml of this to the colorimetric cup. Add 1 ml of colorimetric agent, stir, and use a 1C colorimetric cup. Take the zero tube node. Measure the light change at 50m, and draw a standard line for comparison. 5.3 Calculate the results. x = 000 × 1 333
GB/T5009.32—2003
Test column P content, single gram gram ()
Determine the quality of the city wrinkle ten G, the unit is gram (version:.
Test column mass, unit is gram (double:
, one by one take the micro total volume as the word (L): V: one-determine the tension of the sample liquid, the unit is attenuation liter (m!). The counting retains two valid digits:
Density
The two independent measurements obtained under the conditions of three currencies are the standard difference column shall not exceed the arithmetic balance and the 1C provided! 255
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