Some standard content:
National Standard of the People's Republic of China
Xinpin Paint
Food Standard
Proptowic acid
Subject content and applicable scope
cx10615-89
Adjusted to: HG2/25-18]
This standard specifies the technical requirements, test methods, inspection rules and various requirements for packaging, marking, storage and transportation of propionic acid. This standard applies to propionic acid refined by industrial synthesis. The product is mainly used as an anti-peeling agent for food and can also be used as a flavoring agent for wine. Molecular formula: CHeo
Structural formula: H,C-TiO
Molar mass: 74.08 (following the 1985 International Atomic Energy Standard) 2 Reference standards
GE 601
GB 603
GR 606
GP4472
C36682
Gh6450
GPBAbI
3 Technical requirements
Chemical reagents Preparation of standard solution for titration analysis (quantity analysis) Chemical reagents
Chemical reagents
Preparation of standard solution for impurity determination
Preparation of preparations and products used in test methods General method for colorimetric determination
Chemical reagents
Chemical reagents General method for water determination (Karl Fischer method) Chemical reagents General method for determination of boiling range
General rules for determination of density and relative density of chemical products Specifications for water used in laboratories
Determination method for the limit of metals in food additives
Test method for the limit of metals in food additives 3.) Wafer: pale yellow or slightly yellow liquid with a slightly pungent odor. 3.2 Identification test: qualified.
3.3 Internal acid shall meet the requirements of the following table.
China Chemical Industry Standard 1980-0361, Implementation 1990-02-0
Color (platinum-cobalt), No.
Propionic acid content, islandwwW.bzxz.Net
Relative density ()
Range (2-95%),
Yanfa shallow bay, %
Aldehyde (in acetone)
Oxidized (in formic acid)
Heavy metal (in Pb), %
Arsenic (As). %
Test method
CB 10615-89
0. 993~-0. 997
138. 5-- 142. 5
The reagents and water used in this standard, unless otherwise specified, shall be analytically pure reagents and laboratory water of current national or professional standards.
4.1 Determination of chromaticity
According to the provisions of GB605.
4.2 Specific test
Take 1mL of the sample, add 3 drops of sulfuric acid and 1mL of ethanol, heat and react, it should have an aromatic smell. 4.3 Determination of the content of two acids
4.3.1 Reagents and solutions
Phenolic acid; 1.5% carboxylic acid dissolved in ethanol;
Standard sodium hydroxide solution: c(NaOH)=.gmol/L.4.3.2 Determination steps
Weigh 1.5 ml of the sample, accurate to 0.0002 g, add 1 mL of freshly boiled and cooled water and 2 drops of 1% acid indicator (4.3.1a), and add 0.5mol/L brown standard sodium hydroxide solution (4.5.1h) until the red color persists for 30 seconds without fading, which is the end point. 4.3.3 Result expression and calculation
Propionic acid percentage (X) is calculated by formula (1): X=
-VX0.07408
Sodium hydroxide standard solution concentration, mol/L; sodium hydroxide standard solution dosage, mL;
- sample mass, 8;
1mL sodium hydroxide standard solution Ce(NaOII)=1mol/L) equivalent acid mass, g. 4.3.4 Precision
The difference between two parallel determination results is not greater than 0.2%. The arithmetic mean of the parallel determination results is taken as the determination result. 4.4 Determination of relative density ()
4.4.1 Instrument
According to the provisions of GB4472.
4.4.2 Determination procedure
According to the provisions of GB 1172.
4.5 Boiling range determination
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According to the provisions of GB 616.
4.6 Determination of evaporation residue
4. 6.1 Determination procedure
GD 10615—89
Take 100 mL (equivalent to 100 g) of sample, place it in 125 ml of constant-weight glass or platinum evaporating liquid, evaporate to dryness on a water bath, and dry at 105°C to constant weight.
4.6.2 Expression and calculation of results:
The percentage of residual liquid after evaporation (2) is calculated according to formula (2): X100
Wu Zhong: m1
The mass of the residue after evaporation, 8 months
The mass of the sample,
4.6.3 Precision
The difference between the two results of parallel determination shall not exceed 0.003%. The arithmetic mean of the most parallel determinations shall be the determination result. 4.7 Determination of moisture
Absorb 5 mL (equivalent to 5 g) of sample and measure it according to the provisions of G606. 4.8 Determination of aldehydes
Reagents and solutions
Sodium thiosulfate: 1.5% solution;
Starch indicator solution: 1% solution;
Iodine standard solution: c(1/2 Iz)=0.1 m1/L determination steps
Pipette 10mL of sample into a stoppered conical flask containing 50ml of water and 5ml of 1.5% sodium thiosulfate solution (4.8.1a), cover with stopper and shake vigorously. Leave for 30min, add 2mL of 1% starch indicator solution (4.8.1b), and drip 0.1mol/L iodine standard solution (4.8.1c) until a blue dot appears. Perform a blank test at the same time. The difference in volume of 0.1mol/L iodine standard solution used for blank and sample test solution shall not exceed 1.75mL. 4.9 Determination of easily oxidizable substances
Reagents and solutions
Sodium hydroxide;
Sodium acetate: 20% solution;
Potassium iodide: 25% solution;
Sodium thiosulfate standard solution c(Na,S,0.)-0. 1 mol/L. 4.9.2 Determination steps
Dissolve 15g of sodium hydroxide (4.9.1a) in 50mL of water and cool. Add 6mL of bromine (4.9.1b), stir thoroughly to dissolve it completely, and dilute it to 2000mL with water. Take 25.0mL of the solution and place it in a 250mL stoppered conical flask containing 100mL of water. Add 10mL of 20% sodium acetate solution (4.8.1c) and 1.0mL of acetic acid solution. Leave it for 15min. Add 5mL of 25% potassium iodide (4.8.1d) and 10mL of hydrochloric acid (4.8.e), and drip with 1.1 mol/L sodium thiosulfate standard solution (1.8.1f) until the brown color disappears. Perform a blank test at the same time. The difference between the volume of 0.1 mol/L sodium thiothioate standard solution consumed by the air and the sample shall not exceed 2.2 mL. 4.10 Determination of heavy metals
4.10.1 Sample treatment
According to the digestion method in 5.2.2 of GB8451, 4.10.2 Determination
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GB 10615.89
Absorb 20 mL (equivalent to 2 g) of the sample solution treated in 4.10.1, according to the provisions of GB8451. The limit standard is to take 0.02 mg Pb standard temperature solution.
4.11 Determination of lead
4.11.1 Sample treatment
According to the dry ash method in 1.4.2.2 of GB8150. 4.11.2 Determination
Absorb 0mL (equivalent to 1g) of the sample solution after treatment in 4.11.1. According to the provisions of the arsenic spot method in GB8450. The limit standard is 0.003 m arsenic (As) standard solution.
5 Inspection rules
5.1 The acid should be inspected by the production inspection department to ensure that the products meet the requirements of the standard. Each batch of products should be accompanied by a certain format of spraying instructions.
5.2 The user unit has the right to inspect whether the quality of the received products meets the requirements of this standard in accordance with the provisions of this standard. 5.3 The weight of each batch shall not exceed the output of each batch of the manufacturer. 5.4 Sampling method: Take samples from 20% of the total number of packages in the batch, and the small batch shall not be less than a box (barrel). When sampling, open the package and take samples from the top, middle and bottom. Then mix all the samples. The product is packaged in two ground-mouth bottles, and labels are affixed to the bottles, indicating the manufacturer's name, product name, specifications, batch number and sampling period. The bottles are inspected by the inspection department and the bottles are kept for verification. 5.5 If any item in the inspection result does not meet the standard, a sample should be taken from twice the amount of packaging for re-inspection. If it still does not meet the standard requirements after re-inspection, the entire batch of products will not be accepted.
6 Packaging, marking, purchase, storage and transportation
6.1 Propionic acid is packaged in 500mL small-mouth glass bottles (sealed pads and plastic caps, with a net weight of 500 mL per bottle. The outer packaging is a wooden box with 16 strips added around the top and bottom of the wooden box. Each box contains 20 bottles.
6.2 The packaging should have the words "food additives", manufacturer name, product name, trademark, specifications, batch number, gross weight, net weight, production date and standard number of the product.
6.3 Each batch of finished products should be accompanied by a quality certificate, including: product name, manufacturer name, batch number, production date, specifications, net weight, number of bottles and the standard number of the product. Standard number.
6.4 Storage and transportation: During transportation, it should be kept in a cool place, avoid exposure to sunlight, moisture and heat, and should not be mixed with toxic and harmful substances to avoid contamination. 6.5 Propionic acid should be stored in a cool place and should not be piled in the open air. The shelf life is one year. Additional instructions:
This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry and is under the jurisdiction of the Beijing Chemical Research Institute of the Ministry of Chemical Industry and the Food Sanitation Supervision and Inspection Institute of the Ministry of Health. This standard was drafted by the Shanghai Chemical Reagent Research Institute and the Shanghai Food Sanitation Supervision and Inspection Institute. The main drafters of this standard are Jiang Weifeng and Wang Huifang. This standard refers to the third edition of the propionic acid standard of the National Food Chemical Pharmacopoeia.
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