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GB 7658-2005 English PDF (GB7658-2005)

GB 7658-2005 English PDF (GB7658-2005)

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GB 7658-2005: Food additive -- Sorbitol solution

This Standard specifies requirements, test method, inspection rules as well as marks, package, transport and storage of food additive - sorbitol solution. This Standard is applicable to food additive - sorbitol solution which takes glucose as raw material and is refined by hydrogenation in the presence of catalyst. This product shall be used as humectant and sweetener during food processing.
GB 7658-2005
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 67.220.20
X 42
Replacing GB 7658-1987
Food additive - Sorbitol solution
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ISSUED ON. JUNE 30, 2005
IMPLEMENTED ON. DECEMBER 1, 2005
Issued by. General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Requirements ... 6
4 Test method ... 7
5 Inspection rules ... 17
6 Marks, package, transport and storage ... 19
Appendix A ... 20
Foreword
Some indicators in Table 1 of this Standard are mandatory, and the rest are recommendatory.
This Standard modifies and adopts ?€?Sorbitol solution?€? (issued in 1991) of Codex Alimentarius Commission (CAC) (hereinafter referred to as CAC Standard) (English version).
This Standard is redrafted based on CAC Standard.
Considering China?€?s national conditions, this Standard makes some
modifications when adopting CAC Standard. The main differences between this Standard and CAC Standard are as follows.
- Added pH value, total sugar amount, and relative density (3.2 of this Standard), so as to meet user?€?s needs;
- Modified indicators of solid content, reducing sugar content, arsenic content, heavy metal content, chloride content, and sulfate content (3.2 of this Standard), so as to improve product quality;
- Added weighting method for determination of solid content, taking Karl Fischer method as arbitration law (4.4 of this Standard) for easy use;
- Determinations of arsenic and heavy metal content shall use China
national standards of product testing methods (4.10 and 4.11 of this
Standard);
- Determination of reducing sugar content uses permanganate titration to replace cuprous oxide gravimetric method (4.8 of this Standard), so as to improve the accuracy of test results.
This Standard replaces GB 7568-1987 Food additive - Sorbitol solution.
Compared with GB 7568-1987, the main changes of this Standard are as
follows.
- Added solid content, lead content, chloride content and sulfate content and corresponding test methods (see 3.2, 4.4, 4.11, 4.13 and 4.14 of this edition);
- Modified reducing content indicator from ?€???? 0.63%?€? to ?€???? 0.21%?€?, total sugar content indicator from ?€???? 2.0%?€? to ?€???? 8.0%?€?, nickel content indicator from ?€???? 0.0003%?€? to ?€?2 mg/kg?€? (1.3 of 1987 edition, 3.2 of this edition); - Determination of sorbitol content uses high performance liquid
chromatography to replace iodimetry; determinations of reducing sugar
content and total sugar content use potassium permanganate titration to replace cuprous oxide gravimetric method (2.1, 2.7 and 2.8 of 1987 edition, 4.5, 4.8 and 4.9 of this edition);
- Modified ?€?all items are factory inspection items?€? to ?€?all items are type inspection items of which solid content, sorbitol content, reducing sugar content, total sugar content, nickel content, pH value are factory
inspection items?€? (see 5.1 of this edition).
Appendix A of this Standard is normative.
This Standard was proposed by China Petroleum and Chemical Industry
Federation.
This Standard shall be under the jurisdiction of Subcommittee of Organic Chemicals of the National Technical Committee on Chemical Standards
(SAC/TC 63 / SC 2), and National Institute for Nutrition and Health of Chinese Center for Disease Control and Prevention.
The drafting organizations of this Standard. Roquette Lianyungang Co., Ltd., and Lida (Liuzhou) Chemistry Co., Ltd.
Main drafters of this Standard. Zhuang Defeng, Lao Ming, Li Yan, and Wu Yanhua.
This Standard was issued in April, 1987 for the first time.
Food additive - Sorbitol solution
1 Scope
This Standard specifies requirements, test method, inspection rules as well as marks, package, transport and storage of food additive - sorbitol solution. This Standard is applicable to food additive - sorbitol solution which takes glucose as raw material and is refined by hydrogenation in the presence of catalyst. This product shall be used as humectant and sweetener during food processing.
Molecular formula. C6H14O6
Structural formula.
Relative molecular mass. 182.17 (according to international relative atomic mass in 2007)
2 Normative references
The following standards contain the provisions which, through reference in this Standard, constitute the provisions of this Standard. For dated references, the subsequent amendments (excluding corrections) or revisions do not apply to this Standard. However, the parties who enter into agreement based on this Standard are encouraged to investigate whether the latest versions of these documents are applicable. For undated reference documents, the latest
versions apply to this Standard.
GB/T 601 Chemical Reagent - Preparations of Standard Volumetric
Solutions
GB/T 602 Chemical Reagent - Preparations of Standard Solutions for
Impurity (GB/T 602-2002, ISO 6353-1.1982, NEQ)
GB/T 603 Chemical Reagent - Preparations of Reagent Solution for Use in Test (GB/T 603-2002, ISO 6353-1.1982, NEQ)
Relative density ( ) 1.285~1.315
Reducing sugar (in glucose) mass fraction / % ??? 0.21
Total sugar (in glucose) mass fraction / % ??? 8.0
Arsenic (As) mass fraction / % ??? 0.0002
Lead (Pb) mass fraction / % ??? 0.0001
Heavy metal (in Pb) mass fraction / % ??? 0.0005
Chloride (in Cl) mass fraction / % ??? 0.001
Sulfate (in SO4) mass fraction / % ??? 0.005
Nickel (Ni) mass fraction / % ??? 0.0002
Residue on ignition mass fraction / % ??? 0.10
NOTE. Arsenic (As) mass fraction, lead (Pb) mass fraction and heavy metal (in Pb) mass fraction are mandatory.
4 Test method
4.1 Warning
Some test procedures prescribed in test method may lead to dangerous
situations. The operator shall take appropriate safety and health
measures.
4.2 General provisions
Unless other requirements specified, reagents and water used in this Standard all refer to analytical-pure reagents and Grade 3 water stipulated in GB/T 6682- 2008.
Unless other requirements specified, standard solution, impurity standard solution, preparations and products used for test shall be prepared based on the provisions of GB/T 601, GB/T 602 and GB/T 603.
4.3 Identification test
4.3.1 Reagent
4.3.1.1 Sulfuric acid;
4.3.1.2 Ferrous sulfate solution. 80 g/L;
4.3.1.3 Sodium hydroxide solution. 200 g/L;
sample solution through chromatographic column. Use refractive index detector to detect. Adopt external standard method to quantify. Calculate sorbitol content in sample.
4.5.2 Reagent
4.5.2.1 Water, GB/T 6682, Grade 2. filtered by 0.45 ??m membrane filter, ultra pure and degasified;
4.5.2.2 Sorbitol standard sample. sorbitol mass fraction ???98%;
4.5.2.3 Mannitol
4.5.3 Apparatus
4.5.3.1 High performance liquid chromatography (HPLC)
4.5.3.1.1 High-pressure pump. no pulse, it can maintain flow rate between 0.1 mL/min ~ 10.0 mL/min;
4.5.3.1.2 Dosing ring. 20 ??L;
4.5.3.1.3 Chromatographic column. see Table 2;
4.5.3.1.4 Refractive index detector. 500??10-6 ???RIU or refractive index
detector with corresponding sensitivity
4.5.3.1.5 Data processing system. analysis software with Millennium 32, or chromatography workstation with corresponding functions, or chromatography data processor.
4.5.3.2 Suction filtration system
Suction filtration system uses cellulose ester membrane filter of which aperture is 0.45 ??m (used for preprocessing of mobile phase water).
4.5.3.3 Filtration system
Filtration system uses cellulose ester membrane filter of which aperture is 0.45 ??m (used for preprocessing of sample).
4.5.3.4 Micro syringe
Special for HPLC, 100 ??L.
4.5.4 Chromatography conditions
Recommended chromatography conditions are shown in Table 2. Typical HPLC 4.8 Determination of reducing sugar content
4.8.1 Method summary
Heat at a certain temperature, time and concentration. Reducing sugar in sample shall be oxidized by an excess of Fehling solution, react and produce cuprous oxide precipitate. Sulfate is reduced to ferrous sulfate by cuprous oxide. Use potassium permanganate standard solution to generate ferrous sulfate. Based on the consumption of potassium permanganate standard solution,
check Potassium permanganate cuprous oxide - glucose conversion table, and glucose mass shall be obtained. By calculation, reducing sugar (in glucose) content shall be calculated.
4.8.2 Reagent
4.8.2.1 Fehling solution;
4.8.2.2 Ferric sulfate solution. 50 g/L. Weigh 50 g of ferric sulfate. Add 200 mL of water to dissolve. Gradually add 100 mL of sulfuric acid. After mixing and cooling, add water to dilute to 1000 mL;
4.8.2.3 Potassium permanganate standard solution. c(1/5 KMnO4)=0.1 mol/L. 4.8.3 Apparatus
Sand core crucible. filter plate aperture 5 ??m ~ 15 ??m (G4).
4.8.4 Analysis procedures
4.8.4.1 Weigh 25 g ~ 50 g of laboratory sample (sample weighing amount is determined by amount of reducing sugar), accurate to 0.0002 g. Place it in a 250 mL Erlenmeyer flask filled with about 5 mL of water. Well mix it.
4.8.4.2 Add 40 mL of Fehling solution and some glass balls. Completely mix it. H...

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