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GB 1893-2008: Food additive -- Sodium metabisulphite
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Basic data | Standard ID | GB 1893-2008 (GB1893-2008) | | Description (Translated English) | Food additive -- Sodium metabisulphite | | Sector / Industry | National Standard | | Classification of Chinese Standard | X42 | | Classification of International Standard | 67.220.20 | | Word Count Estimation | 8,889 | | Date of Issue | 2008-06-25 | | Date of Implementation | 2009-01-01 | | Older Standard (superseded by this standard) | GB 1893-1998 | | Quoted Standard | GB/T 191-2008; GB/T 3049-2006; GB/T 6678; GB/T 6682-2008; GB/T 5009.74-2003; GB/T 5009.76-2003; HG/T 3696.1; HG/T 3696.2; HG/T 3696.3 | | Adopted Standard | FCC (V)-2004, NEQ | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 12 of 2008 (No. 125 overall) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This Chinese standard specifies the food additive sodium metabisulfite requirements, test methods, inspection rules, marking, packaging, transportation and storage. This standard applies to food additives, sodium metabisulfite. This product is mainly used as a preservative in food processing, bleaching agents, anti- oxidants. | GB 1893-2008: Food additive -- Sodium metabisulphite---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Food additive.Sodium metabisulphite
ICS 67.220.20
X42
National Standards of People's Republic of China
Replacing GB 1893-1998
Food additive sodium metabisulfite
Posted 2008-06-25
2009-01-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
The standard Chapter 4 and Chapter 7 are mandatory, the rest are recommended.
This standard with the US Food Chemicals Codex [FCC (V).2004] "sodium metabisulfite" (in English) of non-equivalent.
This standard replaces GB 1893-1998 "food additive sodium metabisulfite."
The main differences between this standard and GB 1893-1998 are as follows.
--- "Requirements" increased by 4.1 Appearance (edition 4.1);
--- Main content (Na2S2O5 meter) mass fraction from "not less than 95%" to "not less than 96.5%" (the 1998 edition
3.2, this version 4.2);
--- Iron (Fe) mass fraction from "not more than 0.005%" to "not more than 0.003%" (1998 version 3.2, this version of
4.2);
--- Heavy Metals (as Pb) mass fraction from "not more than 0.0010%" to "not more than 0.0005%" (the 1998 edition
3.2, this version 4.2);
--- Arsenic (As) mass fraction from "not more than 0.0002%" to "not more than 0.0001%" (1998 version 3.2, this version
4.2).
The standard proposed by China Petroleum and Chemical Industry Association.
This standard by the National Standardization Technical Committee chemical inorganic chemicals Club (SAC/TC63/SC1) and the National Food Additives Standardization
Technical Committee (SAC/TC11) common focal point.
This standard drafting units. Tianjin Chemical Engineering Research and Design Institute, Jiading District of Shanghai Malu Chemical Factory, Guangdong Zhongcheng Chemicals Co. Shares
the company.
The main drafters of this standard. Wang Yan, Yang Zhongde, CHAN Yiu Hing, key Deng, Yang Yu.
This standard replaces the previous standard published case. GB 1893-1986, GB 1893-1998.
Food additive sodium metabisulfite
1 Scope
This standard specifies requirements for a food additive sodium metabisulfite, test methods, inspection rules, marking, packaging, transportation and storage.
This standard applies to food additive sodium metabisulfite. The products are mainly used as a preservative in food processing, bleaching agents, anti-oxidants.
2 Normative reference standard
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Study whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 191-2008 Packaging - Pictorial signs (ISO 780.1997, MOD)
General Method GB/T 3049-2006 industrial chemical products, determination of iron content 1,10 Philippines spectrophotometry method
(ISO 6685. 1982, IDT)
GB/T 6678 General Principles for Sampling Chemical Products
GB/T 6682-2008 analytical laboratory use specifications and test methods (ISO 3696. 1987, MOD)
GB/T 5009.74-2003 limit test of heavy metals in food additives
Determination of GB/T 5009.76-2003 arsenic in food additives
Preparation of standard titration solution of HG/T 3696.1 inorganic chemical products, chemical analysis
Preparation of HG/T 3696.2 inorganic chemical products, chemical analysis of impurity standard solution
Preparations of HG/T 3696.3 inorganic chemical products, chemical analysis
3 Symbol
Molecular formula. Na2S2O5
Molecular weight. 190.12 (according to 2007 international relative atomic mass)
4 Requirements
4.1 Appearance. Food additives Sodium metabisulfite is white or slightly yellow crystalline powder.
4.2 Food additive sodium metabisulfite should meet the requirements of Table 1.
Table 1 Requirements
Item Index
Main content (Na2S2O5 dollars), /% ≥ 96.5
Iron (Fe), /% ≤ 0.003
Clarity through test
Arsenic (As), /% ≤ 0.0001
Heavy metals (Pb), /% ≤ 0.0005
5 Test methods
5.1 Safety Tips
The standard test operations require the use of some strong acid, when used, be careful to avoid splashing on the skin. When using a volatile acid is required
Carried out in a fume hood.
5.2 General Provisions
This standard reagents and water, did not indicate when the other requirements, refer to analytically pure reagents and GB/T 6682-2008 specified three
Grade water.
Standard solution, standard solution impurities, formulations and product tests required in the absence of other requirements specified according to HG/T 3696.1,
HG/T 3696.2, the provisions prepared HG/T 3696.3 of.
5.3 Identification of appearance
In natural light, visually distinguish samples taken.
5.4 Identification
5.4.1 Reagents and materials
5.4.1.1 potassium iodide solution. 360g/L;
5.4.1.2 hydrochloric acid;
5.4.1.3 hydrochloric acid solution. 1 + 3;
5.4.1.4 iodine solution. take 1.4g iodine and potassium iodide solution was placed in 10mL, add two drops of hydrochloric acid, dissolved in water, dilute to 100mL, storage
In a brown bottle from light;
5.4.1.5 mercury nitrate solution. take 15g mercurous nitrate, add 90mL water, 10mL nitric acid solution (1 + 9) was dissolved, add a drop of mercury, to avoid
Sealed light stand.
5.4.1.6 platinum wire.
5.4.2 Identification Test
5.4.2.1 This product was sulfite effects Reactions.
After the sample solution was added iodine solution that is faded yellow.
Aqueous hydrochloric acid solution was dropped after the sample has a sulfur dioxide gas to escape to Asia mercury nitrate solution infiltrating dipstick test, which was black.
5.4.2.2 This product is significant sodium effects Reactions.
Infiltration of platinum wire with hydrochloric acid to colorless in the first combustion colorless flame. Then dipped a little sample solution in a colorless flame combustion, the flame that
It was bright yellow.
5.5 Determination of the main content
5.5.1 Method summary
In weakly acidic solution with iodine sulfite oxidized to sulfate. Starch as indicator drops solution with sodium thiosulfate standard titration
Given an excess of iodine.
5.5.2 Reagents and materials
5.5.2.1 Iodine Standard Solution .( Ba 12I) 2 about 0.1mol/L;
5.5.2.2 glacial acetic acid solution. 1 + 3;
5.5.2.3 sodium thiosulfate standard titration solution. Ba (Na2S2O3) about 0.1mol/L;
5.5.2.4 Soluble starch solution. 5g/L.
5.5.3 Analysis of step
Pipette 50mL standard iodine titration solution and placed iodine bottle. Weigh about 0.2g sample, accurate to 0.0002g, was added to a solution of iodine
The stopper, seal, placed 5min in the dark. Join 5mL glacial acetic acid, sodium thiosulfate standard titration solution titration, near the end
, Adding 2mL soluble starch solution and continue titration to the disappearance of the blue solution as the end point.
Meanwhile Pipette 50mL iodine standard solution titration, a blank test in the same conditions.
5.5.4 Calculation Results
Main content of sodium metabisulfite (Na2S2O5) mass fraction of 1 meter, expressed in%, according to equation (1).
1 =
(Vp Vp 0- 1) Ba M/1000
(1)
Where.
Numerical sodium thiosulfate standard titration V0 --- blank test solution consumed volume in milliliters (mL);
Numerical sodium thiosulfate standard titration Vp 1 --- titration solution consumed by the solution volume in milliliters (mL);
Accurate Ba --- sodium thiosulfate standard titration solution concentration value in units of moles per liter (mol/L);
M --- (sodium metabisulfite 14Na2S2O) numerical molar mass of 5 units of grams per mole (g/mol) (M = 47.52).
Take the arithmetic mean of the parallel determination results of the measurement results, the results of two parallel determination of the absolute difference is not more than 0.2%.
5.6 Determination of iron content
5.6.1 Method summary
With GB/T 3049-2006 Chapter 3.
5.6.2 Reagents and solutions
With GB/T 3049-2006 Chapter 4.
5.6.3 Equipment
With GB/T 3049-2006 Chapter 5.
5.6.4 Analysis of step
5.6.4.1 Draw the curve
GB T 3049-2006 according to the provisions of 6.3/use 1cm path length cuvette and the corresponding amount of iron standard solution, drawn work
curve.
5.6.4.2 Preparation of test solution
Weigh about 5g sample to the nearest 0.01g. 250mL beaker and placed on a high type, with a small amount of water dissolved, 25mL of hydrochloric acid solution,
Boiling water bath evaporated to dryness. The residue was dissolved in water, all transferred to 250mL volumetric flask, dilute with water to the mark.
5.6.4.3 Preparation of the blank test solution
High type in 250mL beaker, add a small amount of water, plus 25mL of hydrochloric acid in a boiling water bath to dryness, the residue was dissolved in water, all moved
250mL volumetric flask, dilute to the mark, shake.
5.6.4.4 Determination
Pipette Pipette 50mL test solution and the blank test solution were placed in 100mL flask, the following according to GB/T 3049-
6.4.1 2006, from the "if necessary, add water to 60mL" to get started.
5.6.5 Calculation Results
Iron content of iron (Fe) mass fraction 2 and its value is expressed in%, according to equation (2).
× 100 = 0.5 ×
(2)
Where.
Take the arithmetic mean of the parallel determination results of the measurement results. Two parallel determination results of absolute difference is not more than 0.0005%.
5.7 Clarity
5.7.1 Reagents
5.7.1.1 hydrochloric acid standard solution. Ba (HCl) = 0.1mol/L;
5.7.1.2 nitrate solution. 1 + 3;
5.7.1.3 silver nitrate solution. 20g/L;
5.7.1.4 Soluble starch solution. 20g/L;
5.7.1.5 turbidity measured with standard stock solution. 1mL solution of chlorine (Cl) 1mg;
Pipette 14.1mL standard solution of hydrochloric acid, a 50mL volumetric flask, dilute to the mark.
5.7.1.6 turbidity measured with a standard solution. 1mL solution of chlorine (Cl) 0.01mg;
Pipette 1mL measured turbidity standard stock solution, placed in 100mL volumetric flask, dilute to the mark.
5.7.2 Analysis of step
Weigh (0.50 ± 0.001) g sample was placed in 25mL colorimetric tube, add water to dissolve 10mL. Turbidity test solution should be lower than the standard ratio
Turbid solution.
Turbidity standard solution. Pipette 1.2mL measured turbidity standard solution, placed in 25mL colorimetric tube, add water to 20mL, add 1mL nitrate
Acid solution, 0.2mL soluble starch solution, 1mL silver nitrate solution, shake, place 15min.
5.8 Determination of Arsenic
Weigh (1.00 ± 0.01) g sample was placed in 250mL beaker, add 5mL dissolved in water. Plus 2mL nitric acid, 1mL of sulfuric acid in water
Evaporated to dryness on the bath. The 25mL of water was added to dissolve the residue, all moved into the conical flask arsenic measuring device, add 3mL hydrochloric acid, shake. With
Operating according to GB/T 5009.76-2003 Chapter 11 provisions.
Standards developed using 1mL pipette pipette arsenic standard solution (1mL solution containing 1μg arsenic), arsenic measuring means placed in a conical flask, add
25mL water, following the same treatment simultaneously with the test solution.
5.9 Determination of Heavy Metal Content
Weigh (1.00 ± 0.01) g sample was placed in 100mL beaker, add 5mL dissolved in water, add 2mL of hydrochloric acid, in a water bath to evaporate
dry. Add 5mL water, 1mL hydrochloric acid, and then evaporated to dryness on a water bath. Add 0.5mL glacial acetic acid, the residue dissolved in 20 mL of water, was added
1 drop of phenolphthalein indicator solution, with ammonia (1 + 1) adjusted to pink, the following press GB/T 5009.74-2003 Chapter 6 were measured.
Standard colorimetric solution with a pipette, take 5mL lead standard solution (1mL solution containing 1μg lead), placed in 50mL Nessler colorimetric tube
, Add 0.5mL glacial acetic acid, 20 mL of water, was added 1 drop of phenolphthalein indicator solution, and aqueous ammonia solution (1 + 1) is adjusted to pink, according to the following
GB/T 5009.74-2003 Chapter 6 were measured.
6 Inspection rules
6.1 All items specified in this standard are factory inspection items should test batch.
6.2 continuous production to one shift as a group, when a group of more than 30t, 30t to batch.
6.3 determine the sampling units according to GB/T 6678 provisions. Sampling, the sampler from the center of the bag is inserted into the vertical depth of the material layer
3/4 samples. The sample was taken out of the mix, with a quartering reduced to less than 500g. The samples were packed in two clean, dry container
And sealing and adhesive labels, indicating manufacturer name, product name, batch number, date of sampling and sampling by name. A test for use, another
For three months for future reference.
6.4 Food additive sodium metabisulfite by the manufacturer's quality supervision and inspection department inspection in accordance with this standard, the manufacturer shall ensure that
All manufactured products are in line with the requirements of this standard.
6.5 If an indicator test results do not meet the requirements of this standard should be twice the amount of packaging from re-sampling retest, retest results that is
So that only an indicator does not meet the requirements of this standard, then the entire batch of products to be ineligible.
7 signs, labels
7.1 Food additives should be on the packaging firm metabisulfite clear signs include. manufacturer's name and address, product name, "food
Additives "words, net weight, lot number or production date, license number and logo, health license number of the standard number, and
GB/T 191-2008 stipulated "afraid of the rain," "afraid of the sun" flag.
7.2 each batch of food additive sodium metabisulfite should be accompanied by a certificate of quality, including. manufacturer's name and address, product name,
"Food additive" words, net weight, lot number or production date, license number and logo, health permit number, product quality in line with the present
Proof of this standard and standard number.
8 packaging, transportation, storage
8.1 Application of food additive sodium metabisulfite food grade polyethylene film bag for packaging, thickness not less than 0.06mm; plastic packaging
Bags or cardboard drum. Zhakou inner bag; outer bag should be securely stitched, stitches neat, pitch uniform, seamless joints and jumpers phenomenon. Bag (or bucket) Net content
The amount of 25kg, 50kg. Or according to user requirements for packaging.
8.2 during transport to prevent rain and not get wet and packaging shall not be defaced, prohibited and oxidants, harmful, toxic substances and other pollutants
Mixed storage items, mixed operation.
8.3 Food additive sodium metabisulfite stored in a dry, ventilated warehouse dedicated food additives, and the need to underlay cushion to prevent moisture.
8.4 Food additive sodium metabisulfite shelf life of six months, expired inspection can still continue to use.
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