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GB 29946-2013: Food additive -- Cellulose
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GB 29946-2013	English	319	Add to Cart	3 days [Need to translate]	Food additive -- Cellulose

GB 29946-2013: Food additive -- Cellulose

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Food additive-Cellulose National Standards of People's Republic of China Issued on. 2013-11-29 2014-06-01 implementation National Food Safety Standard Food Additives Cellulose National Food Safety Standard Food Additives Cellulose

1 Scope

This standard applies to cellulose pulp fibers derived from α- plants as raw material, after purification and mechanical crushing resulting fiber food additive Su. 2 molecular formula, relative molecular mass and structural formula Formula 2.1 (C12H20O10) n 2.2 formula 2.3 relative molecular mass (324) n (according to 2007 international relative atomic mass, n is generally greater than 500).

3 Technical requirements

3.1 Sensory requirements Sensory requirements shall comply with the requirements of Table 1. Table 1 Sensory requirements Project requires test methods Color White take appropriate sample placed in white porcelain plate, observe its color under natural light Chak and Status powdery, granular or flaky 3.2 Physical and Chemical Indicators Physical and chemical indicators should be consistent with the provisions of Table 2. Table 2. Physical and chemical indicators Item Index Test Method Cellulose [(C12H20O10) n] content, w /% ≥ 92 GB/T 5009.10 Loss on drying, w /% ≤ 7 GB 5009.3 a direct drying pH 5.0 ~ 7.5 in Appendix A A.3 Water-soluble material, w /% ≤ 1.5 Appendix A A.4 Ash, w /% ≤ 0.3 GB 5009.4 b Starch test by test A.5 in Appendix A Lead (Pb)/(mg/kg) ≤ 2 GB 5009.12 a drying temperature and time are 105 ℃ ± 2 ℃ and 3 h, respectively. b burning at 800 ℃ ± 25 ℃ to constant weight.

Appendix A

Testing method A.1 General Provisions Unless otherwise specified in this standard, the use of analytical reagent purity should be more than the standard titration solution, standard solution for measuring impurities, Preparations and products, should be GB/T 601, GB/T 602, the provisions of the preparation of GB/T 603, the test water should be consistent with GB/T 6682-2008 in three water Provisions. Solution was used in the tests did not indicate what is formulated with solvent, it refers to an aqueous solution. A.2 Identification Test A.2.1 Solubility Test Do not dissolve in water, ethanol, ether and mineral acid solution. Slightly soluble in sodium hydroxide solution. A.2.2 suspension test The water mixing 30 g sample and 270 mL, the mixture in a high speed mixer (about 12000 r/min) was mixed 5 min. The final solution to the free stream Moving the suspension or illiquid strong, containing lumps of suspension. If you get a free-flowing suspension, then 100 mL of the solution, Placed in 100 mL graduated cylinder and allowed to stand 1 h, a solid precipitate appeared at the bottom of the cylinder. A.3 pH measurement Weigh the sample at 105 ℃ ± 2 ℃ drying 3 h after 10.0 g, 90 mL of water are mixed and allowed to stand for 1 h, stirring occasionally during centrifugation. However After measuring the pH with a pH meter supernatant. A.4 Determination of water-soluble substance A.4.1 Analysis step Weigh the sample at 105 ℃ ± 2 ℃ drying 3 h after about 6 g, accurate to 0.001 g, and 90 mL freshly boiled and cooled water mixed, allowed to stand 10 Stirring occasionally min, period, filtered, and the filtrate was discarded early 10 mL, if necessary, the remaining filtrate was re-filtered to give a clear filtrate. Take 15 mL The filtrate was transferred to a known weight of the evaporating dish is placed on a steam bath and evaporated to dryness and then at 105 ℃ ± 2 ℃ in dry 1 h, cooled in a desiccator After weighing. A.4.2 Calculation Results Hydrotropes mass fraction w1 according to formula (A.1) Calculated. twenty one 1  m mmw (A.1) Where. After m1-- dried evaporating dish along with the total mass of the dried material in grams (g); Quality m2-- evaporating dish in units of grams (g); m0-- sample mass, in grams (g). A.5 starch test A.5.1 Reagents and materials Iodine solution. Weigh iodine 14.0 g, 36.0 g of potassium iodide dissolved containing 100 mL aqueous solution, 3 drops of hydrochloric acid, diluted with water to 1000 mL. A.5.2 Analysis step Take 20 mL of the mixture A.2.2 identification test, add a few drops of iodine solution, mix, no blue or violet blue color, is through testing. ...