Some standard content:
National Standard of the People's Republic of China
Food additive
Ethyl lactate
661.733.2
GB 8317-87
This standard specifies certain characteristics of ethyl lactate in order to evaluate its quality. Ethyl lactate is synthesized and refined by esterification reaction of lactic acid and ethanol in the presence of a catalyst. 1 Product chemical name, molecular formula, structural formula, molecular weight Chemical name: Ethyl lactate (α-hydroxypropionic acid ethyl ester); Molecular formula: C,HioO3
Structural formula: CH:CHOHCOOC2Hs
Molecular weight: 118.13 (according to the international atomic weight in 1983). Technical requirements
Relative density (25/25℃)
Refractive index (20℃)
Acid value (mg·KOH/g)
Ester content, %
Arsenic (As) content, %
Heavy metal (Pb), %
3 Test method
3.1 Color and shape
3.1.1 Instrument
a. Volumetric flask: 500mL,
not more than
not less than
not more than
not more than
approved by the Ministry of Light Industry of the People's Republic of China on November 28, 198796
colorless to slightly yellow transparent liquid,
color not exceeding the color scale of standard colorimetric solution No. 5
with soft fruity fragrance
1. 029~1. 032
1.410~1.420
implemented on March 1, 1988
colorimetric tube: 25mL or 50mL.
3.1.2 Reagents and solutions
a. Potassium dichromate (GB642): high purity, b. Sulfuric acid (GB622): 2% solution,
GB 8317-87
Standard colorimetric solution No. 5 color scale: Accurately weigh 0.0055g of potassium dichromate into a beaker, add a small amount of 2% sulfuric acid solution to dissolve, pour c
into a 500mL volumetric flask, accurately dilute to the scale with 2% sulfuric acid solution, shake well and set aside. 3.1.3 Colorimetric method
Place the sample and the standard colorimetric solution at the same scale of the colorimetric tube respectively, and evaluate the color by visual inspection along the axis direction under a white background. 3.2 Determination of aroma.
See QB795 "Uniform Test Method for Flavors -
-Determination of Aroma".
3.3 Determination of relative density (25/25℃) See QB796 "Uniform Test Method for Spices - Specific Gravity Determination Method". Method 1 (Specific Gravity Bottle Method)
Correction coefficient f: 0.00103 for every 1℃ difference. 3.4 Determination of refractive index (20℃)
See QB798 "Uniform Test Method for Spices
3.5 Determination of acid value
See QB806 "Uniform Test Method for Spices -
Reagent preparation and calibration:
Refractive index determination method".
Acid value determination method".
Sodium hydroxide standard solution (0.1N): First prepare sodium hydroxide solution (50%) and let it stand for several days to remove carbonates. Take about 3 mL of the upper clear solution and dilute it to 1000 mL, and use potassium hydrogen phthalate (0.5 g) to calibrate according to QB793 "Uniform Test Method for Flavors-Preparation Method of Standard Solution". bZxz.net
b. Refined ethanol (95%): see QB793. Neutral refined ethanol (95%): see QB793. c.
d. Phenolic acid indicator (1%): see QB793. The allowable difference between parallel test results is 0.2.
3.6 Determination of ester content
See QB "Uniform Test Method for Flavors
Reagent preparation and calibration:
Ester determination method"
Hydrochloric acid standard solution (0.5N): see QB793; sodium hydroxide standard solution (0.1N): see QB793, potassium hydroxide ethanol solution (0.5N): see QB793, refined ethanol (95%): see QB793;
Neutral refined ethanol (95%): see QB793, phenolic acid indicator (1%): see QB793;
Sample amount: 1g.
Ester content is calculated as ethyl lactate. The milligram equivalent of ethyl lactate is 0.1181. The allowable difference of parallel test results is 0.5%. 3.7 Determination of content (As)
3.7.1 Instrumentation
According to the instrumentation diagram of the 1985 edition of the Chinese Pharmacopoeia "Arsenic Salt Inspection Method". 3.7.2 Reagents and solutions
Hydrochloric acid (GB·622): 11% solution,
Magnesium oxide (HG3114);
GB 831787
Magnesium nitrate (HG3-1077): 10% solution; c
Potassium iodide (GB1272): 15% solution;
Stannic chloride (GB638): 40% solution, prepared according to GB603 "Chemical Reagent Preparations and Products Preparation Methods"; e.
f. Arsenic-free metallic zinc (HG3073),
, g. Lead acetate cotton: prepared according to GB603: h. Mercuric bromide test paper: prepared according to GB603, i. Arsenic standard solution (mL contains 0.001 mg arsenic): prepared according to GB602 "Preparation method of standard solution of impurities in chemical reagents" and diluted 100 times.
3.7.3 Operation procedure
Weigh 1g of sample (accurate to 0.1g), place it in 50mL porcelain evaporator III, add 1g of magnesium oxide and 5mL of magnesium nitrate solution (take the same amount of magnesium oxide and magnesium nitrate solution as blank at the same time), evaporate to dryness in a boiling water bath, heat with low heat to carbonize, and then burn at 500-600℃ until it is completely incinerated. Cool, add a small amount of water, and then add hydrochloric acid solution to neutralize and dissolve the residue. Add water to the total volume of 23mL, transfer it to a conical flask, add 5mL of hydrochloric acid, 5mL of potassium iodide solution and 5 drops of stannous chloride solution, shake well, let it stand at room temperature for 10min, then add 2g of arsenic-free metallic zinc, immediately install the glass tube filled with lead acetate cotton and mercuric bromide test paper, and place it in a dark place at 25-30℃ for -1h. The color of the mercuric test paper shall not be darker than the standard. The standard is 3mL of arsenic standard solution and the sample are treated in the same way at the same time. 3.8 Determination of heavy metal content (in terms of Pb) 3.8.1 Reagents and solutions
a. Ammonia water (GB631): 1:3 solution;
b. Glacial acetic acid (GB676): 30% solution, \C: "Phenolic acid indicator solution 1% ethanol solution: prepared according to GB603 "Chemical reagent preparation and product preparation method": Saturated bowl of hydrogenated water: prepared according to GB603 (prepared before use) td
Lead standard solution (1mL contains 0.01mg lead): prepared according to GB602 "Chemical reagent impurity standard solution preparation method" and then diluted e.
10 times.
3.8.2 Operating procedures
Weigh 2g of sample (accurate to 0.1g), place it at 5 0mL porcelain evaporator, evaporate to dryness on a boiling water bath. First carbonize with a low fire, then ash at 550℃ and cool. Add 0.5mL acetic acid solution, add 20ml water after dissolving (filter if necessary), place in a 50mL sodium colorimetric tube, add 1 drop of phenolphthalein indicator solution, adjust to light red with ammonia solution, add 0.5mL acetic acid solution, add water to 25mL, add 10mL saturated hydrogen peroxide, shake well, and place in a dark place for 10min. The color must not be darker than the standard. The standard is to take 2mL of lead standard solution, add 0.5mL acetic acid solution, add water to 25mL , add 10mL. saturated hydrogen sulfide water, shake well, and place in the dark for 10 minutes.
4 Inspection rules
4.1 Ethyl lactate shall be inspected by the inspection department of the manufacturer. The manufacturer shall ensure that all products shipped meet the requirements of this standard. Each batch of products shipped shall be accompanied by a quality certificate, which includes: manufacturer name, product name, date of shipment, batch number, quantity, and product quality compliance with the standard number of this standard.
4.2 The acceptance unit has the right to inspect according to the technical requirements, test methods and inspection rules specified in this standard. Conduct acceptance, and accept each batch once, and accept different batches separately.
4.3 For each batch of packaging units with less than 100 units, take 2 units, and for more than 100 units, take 3 units. When opening the package for sampling, first check the appearance for moisture and impurities, then shake to mix thoroughly, then use a glass sampling tube to take 50-100mL of sample, inject into the mixer to mix evenly, and put them into two clean and dry glass bottles with frosted stoppers and caps. Mark the manufacturer name, product name, batch number, quantity and sampling date on the bottles. One bottle is used for inspection, and the other is kept for future reference. 4.4 If one of the indicators in the acceptance results does not meet this standard, the manufacturer can re-test the sample from the double amount of packaging together with the manufacturer. If the indicators are still unqualified, the batch of products cannot be accepted. 98
GB 8317-87
4.5 When the supply and demand parties have objections to the product quality, they can resolve it by agreement or invite a third party to arbitrate. 5 Marking, packaging, transportation, storage
5.1 Ethyl lactate can be packed in edible plastic barrels, aluminum cans or galvanized iron barrels. The manufacturer name, product name, trademark, batch number, net weight, tare weight, and ex-factory date are marked on the outside of the packaging; this standard number and the mark of flammable items. If the ordering unit has special requirements, it can make another agreement with the manufacturer.
5.2 This product should be stored in a dry, ventilated and cool warehouse. It must not be piled in the open air. It should be protected from sunlight and rain during transportation. 5.3 If the specified storage and transportation conditions are met, the packaging is intact and unsealed, the shelf life is one year. Additional notes:
This standard is equivalent to the US FCC1981 and is formulated based on the third edition of the US Food Chemical Substances (Food Additives) Specifications. The legal unit of specific gravity is changed to relative density. The determination method still uses QB796 "Uniform Test Method for Spices - Specific Gravity Determination Method". This standard was proposed by the Ministry of Light Industry and the Ministry of Health of the People's Republic of China: it is under the jurisdiction of the Spice Science Research Institute of the Ministry of Light Industry and the Food Hygiene Supervision and Inspection Institute of the Ministry of Health.
This standard was drafted by Wujiang Spice Factory, Jiangsu Provincial Health and Epidemic Prevention Station, and the Spice Industry Science Research Institute of the Ministry of Light Industry. 99
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