Some standard content:
National Standard of the People's Republic of China
Food Additives
GB 1975 -- 80
This standard applies to the mucilage agar extracted from cauliflower (iclidumamausil) and several other red algae and dehydrated and dried. It can be added to food as a thickener and stabilizer. Technical Requirements
1. Appearance: mortar-like or light yellow strips or powder. 2. Agar should meet the following requirements
Loss on drying. %
Ignition residue, %
Water absorption
Water insoluble matter, %
Monument (As), %
Heavy metals (in terms of Pb), %
II. Acceptance rules
Conform to requirements
Conform to regulations
3. This product shall be inspected by the technical inspection department of the manufacturer. The annual production factory shall ensure that all products shipped meet the requirements of this standard. Each batch of products shipped shall be accompanied by a quality certificate. 4. The user unit may verify the quality of the received products in accordance with the inspection rules and inspection methods specified in this standard to check whether its indicators meet the requirements of this standard.
5. The weight of each batch shall not exceed the daily output of production. 6. Sampling method: Samples shall be selected from 10% of the number of pieces in each batch, and the number of small batches shall not be less than 3 pieces. From the selected pieces, 100 grams of each piece shall be taken as a sample, and the total sample weight of each batch shall not be less than 1 kilogram. The strip samples should be cut into pieces, and the selected samples should be quickly mixed and divided into about 200 grams by quartering method, and then sealed and stored in two portions. The labels should indicate: manufacturer name, product name, batch number and sampling date. ·· portions should be sent to the laboratory for analysis.
7. If any of the following indicators do not meet the requirements of this standard during the inspection, samples should be selected from twice the number of pieces for re-verification. If only · indicators do not meet the requirements of this standard during the re-verification, the entire batch cannot be accepted. Issued by the General Administration of Standards of the People's Republic of China
Ministry of Health of the People's Republic of China
State Administration of Fisheries
October 1, 1980
Guangdong Provincial Health and Epidemic Prevention Station
Implementation of Qingdao Ocean Fishery Company Aquatic Products Processing Plant
GB 1975-80
8. If the supply and demand parties have objections to the product quality, they shall be punished according to Article 18 of the "Food Hygiene Management Regulations of the People's Republic of China". III. Test methods
9. Identification
(1) Reagents and solutions
Iodine (GB675--77): 0.02N solution; Hydrochloric acid (GB622-77): analytical grade,
Barium chloride (GB652-78): 5% solution, Sodium hydroxide (GB629-77): 4% solution; Copper tartrate alkaline solution: This solution is divided into Liquid A and Liquid B. When used, equal amounts can be mixed and applied: Liquid A: Take 6.93 g of copper sulfate (GB665-78 analytical grade), add appropriate amount of distilled water to dissolve it into 100 ml; Liquid B: Take 34.6 g of potassium sodium tartrate (GB1288-77 analytical grade) and 10 g of sodium hydroxide (GB629-77 analytical grade), add appropriate amount of distilled water to dissolve it into 100 ml.
(2) Identification procedures
a. Take 1 gram of the sample, add 65 ml of distilled water, boil for 10 minutes, stir constantly, and use hot distilled water to make up for the water dispersed by boiling. Let it cool to 32-39℃, then it will condense into a translucent elastic gel-like substance, and start to melt when heated to 85℃. b. Take a fragment of the sample and immerse it in 0.02N iodine solution. After a few minutes, it will turn brown-black. Take it out and soak it in water until it gradually turns purple.
C. Take 4 ml of 0.5% aqueous solution of the sample, add 0.5 ml of hydrochloric acid and heat it in a water bath for 30 minutes. Add 1.5 ml of sodium hydroxide solution and 6 ml of tartaric acid alkaline solution and heat it in a water bath to produce a red precipitate. 10. Determination of loss on drying
Weigh 12 grams of the sample (accurate to 0.001), put it in a weighing bottle of known weight and dry it in an oven at 105℃ to constant weight. Drying loss X (%) is calculated as follows:
Where: G,--weight of weighing bottle plus sample before drying, g,--weight of weighing bottle plus sample after drying, g; G?--
G weight of weighing bottle, g.
11. Determination of ignition residue
Take 1 gram of sample (weighed to 0.001 gram) in a crucible with constant weight, first carbonize it on an electric furnace, and then ash it at 600-700℃ to constant weight. Ignition residue X2 (%) is calculated as follows:
Where: G,--weight of sample plus crucible, g; G2
-weight of crucible plus ash, g;
G--weight of crucible, g.
12. Determination of water absorption
Take 5 grams of sample (weighed to 0.1 grams), place in a 100-ml measuring tube, add distilled water to make 100 ml, stir well, let stand at 25°C for 24 hours, filter with wet glass wool, place the filtrate in another measuring tube, drain the residual liquid, and the total amount of filtrate collected should not exceed 75 ml. 13. Determination of water-insoluble matter
Take 1.5 grams of sample (weighed to 0.001 grams), place in a beaker, add appropriate amount of distilled water to make 200 ml, boil and dissolve, filter while hot with G3 vertical fused glass or Gooch crucible that has been weighed to constant weight, wash the residue with hot distilled water several times, filter the washing liquid, and dry the filter residue at 105°C to constant weight. Water insoluble matter X, (%) is calculated as follows: 461
Wherein: G.--weight of the crucible plus residue, g G2--weight of the crucible, g; wwW.bzxz.Net
G--weight of the sample, g.
14, Determination of arsenic
GB 1975--80
G1-G2 ×100
(1) Instruments: According to the "Arsenic Salt Inspection Method of the 1977 Edition of the Pharmacopoeia of the People's Republic of China". (2) Reagents and solutions
Phenolphthalein (HGB3039--59): 1% ethanol solution; Magnesium oxide (HG3-1294-80): analytical grade; Hydrochloric acid (GB622--77): analytical grade,
Magnesium nitrate (HG31077-77): analytical grade, 50% solution; Sulfuric acid (GB625--77): analytical grade,
Potassium iodide (GB1272-77): 15% solution; Stannous chloride (GB638-78): 40% hydrochloric acid solution Arsenic-free metallic zinc: HGB3073-59), analytical grade , Lead acetate cotton: soak the absorbent cotton with 5% lead acetate solution, squeeze it dry, dry it at 100℃, and store it in a sealed bottle. Mercuric bromide test paper: cut the dense smooth filter paper into small pieces, immerse it in 5% mercuric bromide ethanol solution, take it out, place it in a cool place to dry for ten days, and store it in a sealed brown bottle;
Arsenic standard solution: prepare it according to GB602-77, dilute it 100 times before use, and each milliliter is equivalent to 0.001 mg of arsenic. (3) Determination of F line
Take 1 gram of sample (weighed to 0.001 gram), add 0.5 gram of magnesium sulfate, 1.0 ml of 50% magnesium nitrate solution and a small amount of distilled water, stir evenly, dry it, first carbonize it with a low fire, then ash it at 500-600℃, wash the boron with 20 ml of distilled water in batches Transfer to a conical flask, add a few drops of phenol indicator solution, add hydrochloric acid to adjust to the mountainous state, dissolve the residue, add 5 liters of hydrochloric acid into III, wash into the conical flask, add 5 ml of 15% potassium iodide solution and 5 drops of 40% tin nitride hydrochloric acid solution, shake well and let stand for 10 minutes, add 2 grams of zinc free metal, immediately put the glass tube filled with lead acetate cotton and chlorinated test paper into the cold, place it in a dark place at 25-30℃ for 1 hour, and the color of the test paper should not be too dark. The standard is to take 1 ml of arsenic standard solution and treat it with the sample solution at the same time. 15. Determination of heavy metals
(1) Reagents and solutions
Glacial acetic acid ((B676-78): 30% solution; magnesium nitrate (HG3-1077-77): analytical grade, 50 % solution: Hydrochloric acid (B622-77): analytical grade, 1:2 solution; Saturated ammonia sulfide: Prepare immediately before use:
Hydroxylamine hydrochloride (HG3-967-76): 20% solution, brown bottle, store in refrigerator: Lead standard solution: Prepare according to (B602-77, dilute 10 times before use, 0.01 mg lead per ml. (2) Determination procedure
Weigh 1 gram of the sample (accurate to 0.001 gram), add 2 ml of 50% magnesium nitrate solution, stir evenly, dry the scale first with low heat carbonization, then} 500-600℃ ash completely, add 1:2 hydrochloric acid to moisten, steam, add a few drops of 1:2 hydrochloric acid, 10 ml of distilled water, stir to dissolve, test with p11 test paper, make it neutral. Quantitatively transfer into 50 ml Nessler colorimetric tubes, add distilled water to dilute to 25 ml, make 4 tubes. In another 50 ml Nessler colorimetric tube, add 4 ml of lead standard solution and dilute to 25 ml with distilled water to form tube B. Add 0.5 ml of 20% hydroxylamine hydrochloride solution to each tube # and tube B, and 0.5 ml of 30% acetic acid solution, shake the spoon, add 10 ml of saturated hydrogen sulfide water to each, shake the spoon, place in the dark for 10 minutes for colorimetry, the color of tube A should not be darker than tube B. 16. Determination of starch
(1) Reagents and solutions:
GB1975-80
Iodine (GB675-77): chemically pure, 0.1N solution. (2) Determination procedure:
Take 0.5 g of sample, add 100 ml of distilled water, boil and dissolve, cool, add 2 drops of 0.1N iodine solution, no blue color should appear. IV. Packaging, marking, storage and transportation
17. This product is packaged in food plastic bags or bottles in 100 g, 250 g and 15 kg packages, and is packaged in wooden boxes or cartons. Strips can be 25 kg each, divided into 200 small bundles or bulk, and tightly packaged with moisture-proof paper and straw mats. 18. Each box or piece should be accompanied by a quality certificate. Indicate: manufacturer name, product name, batch number, net weight, production date, proof that product quality meets the requirements of this standard and the number of this standard. 19. Each box or piece should be firmly marked with: food additive agar, manufacturer name, production date, batch number and net weight. 20. This product should be stored in a dry warehouse, strictly prevent moisture, and must not be mixed with toxic substances. The requirements during transportation are the same as those for storage. 463
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