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GB 26402-2011: National food safety standards of food additive potassium iodate
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| GB 26402-2011 | 139 |
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National food safety standards of food additive potassium iodate
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Basic data
Standard ID: GB 26402-2011 (GB26402-2011)
Description (Translated English): National food safety standards of food additive potassium iodate
Sector / Industry: National Standard
Classification of Chinese Standard: X40;C54
Classification of International Standard: 67.220.20
Word Count Estimation: 6,677
Date of Issue: 2011-03-15
Date of Implementation: 2011-05-15
Regulation (derived from): Ministry of Health Bulletin No. 7 of 2011
Issuing agency(ies): Ministry of Health of the People's Republic of China
Summary: This Chinese standard applies to iodine and potassium chlorate as raw materials for chemical synthesis, with potassium hydroxide and potassium iodate intermediates, cooling crystallization, filtration, drying food additive potassium iodate.
GB 26402-2011: National food safety standards of food additive potassium iodate
---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.
National food safety standards of food additive potassium iodate
National Standards of People's Republic of China
National standards for food safety
Food additives potassium iodate
2011-03-15 release
2011-05-15 implementation
Issued by the Ministry of Health of the People's Republic of China
National standards for food safety
Food additives potassium iodate
1 Scope
This standard is suitable for iodine and potassium chlorate as raw materials for chemical synthesis, with potassium hydroxide and intermediate products potassium hydrogen iodide, the cooling knot
Crystal, filter, dry the prepared food additive potassium iodate.
2 molecular formula, structural formula and relative molecular mass
2.1 Molecular formula
KIO3
2.2 Structural formula
2.3 Relative molecular mass
214.00 (according to.2007 International Relative Atomic Quality)
3 technical requirements
3.1 sensory requirements. should be consistent with the provisions of Table 1.
Table 1 sensory requirements
The project requires a test method
Colorless or white color
Taste, smell odorless, taste slightly astringent
Organizational state Crystallization or powder
Take the sample 2g placed in the surface dish, used in natural light
Visual method to observe the appearance of the form, the use of nasal sniffing method
Check the smell, taste its taste
3.2 Physical and chemical indicators. should be consistent with the provisions of Table 2.
Table 2 Physical and chemical indicators
Item Index Test Method
pH (5% potassium iodate solution) 5 ~ 8 GB/T 9724
Chlorate (in terms of ClO3)/(mg/kg) ≤ 100 GB 1258
Table 2 (continued)
Item Index Test Method
The identification test was carried out by examining A.2 in Appendix A.
Iodide (in I)/(mg/kg) ≤ 20 Appendix A A.3
Dry reduction, w /% ≤ 0.5 Appendix A A.4
Heavy metals (Pb)/(mg/kg) ≤ 4 Appendix A A.5
Arsenic (As)/(mg/kg) ≤ 3 Appendix A A.6
Sulfate (in SO4)/(mg/kg) ≤ 50 Appendix A A.7
Potassium iodate (KIO3) (on a dry basis), w /% ≥ 99.0 Appendix A A.8
Appendix A
Testing method
A.1 General provisions
Unless otherwise stated, only the reagents identified as analytical reagents and the water specified in GB/T 6682-2008 are used in the analysis. Analysis center
Standard solution, preparation and products for the determination of impurities, standard GB/T 601,
GB/T 602, GB/T 603. The solution used in this test does not specify what kind of solvent preparation, refers to the aqueous solution.
A.2 Identification test
A.2.1 Identification of iodate
Take the sample about 20mg, add water, add 5mL, add sulfur dioxide saturated solution 1 drop, shake, add a few drops of starch indicator, that was significantly
blue.
A.2.2 Identification of potassium salts
Take platinum wire moist with hydrochloric acid, dipped in the sample, burning in a colorless flame, the flame that is purple (containing a small amount of sodium salt samples,
Blue glass observation). At the same time take the sample heating incandescent to remove the miscellaneous ammonium salt, put cold after the addition of water, plus 0.1% sodium tetraphenylborate dissolved
Liquid and acetic acid, that is, to generate white precipitate.
A.3 Determination of iodide
Take the sample 1g, add 10mL of water dissolved, add dilute sulfuric acid 1mL and starch indicator solution 1 drop, not blue.
A.4 Determination of dry reduction
Take the sample mixed evenly (such as the larger crystal, should be quickly mashed to make 2mm below the small particles), take about 1g sample, placed in the dry
Dry to constant weight of the container in the precision weighing, drying at 105 ℃ 4h to constant weight. The weight loss of the sample was calculated from the weight loss and the sample size.
A.5 Determination of heavy metals (Pb)
Take the sample 2.0g diluted with water, add acetic acid buffer (pH3.5), in accordance with the "People's Republic of China Pharmacopoeia" two (2010 version) attached
Recorded Ⅷ H first method "test.
A.6 Determination of arsenic
Take A.5 the remaining sample solution 5mL, diluted with water to 30mL, take 20mL, add water to 23mL, add hydrochloric acid 5mL, according to
GB/T 5009.76 Determination of arsenic content.
A.7 Determination of Sulfate
According to the "People's Republic of China Pharmacopoeia" two (2010 version) potassium iodate in the determination of sulfate method.
Determination of potassium iodide (on a dry basis)
Accurately weighed the sample 0.8g (accurate to 0.0001g), set 250mL volumetric flask, add water and dilute to the mark, shake; precision
Take 25.0mL, set iodine bottle, add potassium iodide 2.0g and dilute hydrochloric acid 10mL, dense plug, shake, in the dark place for 5min, add water 100mL,
With sodium thiosulfate titration solution (0.1mol/L) titration, to near the end, add starch indicator solution 2.0mL, continue to titration to blue disappear, and
The results of the titration are corrected with blank test. Each 1 mL of sodium thiosulfate titration solution (0.1 mol/L) corresponds to 3.567 mg of KIO3.
......
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