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GB 1886.92-2016: National Food Safety Standard -- Food Additives -- Sodium Stearyl Lactate
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GB 1886.92-2016: National Food Safety Standard -- Food Additives -- Sodium Stearyl Lactate

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(Food safety national standard - Food additive - Sodium stearoyl lactylate) National Standards of People's Republic of China National standards for food safety Food Additives Stearyl Lactate 2016-08-31 released 2017-01-01 Implementation People's Republic of China National Health and Family Planning Commission released National standards for food safety Food Additives Stearyl Lactate

1 Scope

This standard applies to stearic acid and lactic acid, sodium salt in the synthesis of food additives made of stearyl lactylate.

2 technical requirements

2.1 sensory requirements Sensory requirements shall comply with the requirements of Table 1. Table 1 sensory requirements The project requires a test method Color cream color State powder or brittle solid Take the appropriate amount of sample in a clean, dry white porcelain dish Under the light, observe the color and state 2.2 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 Acid value (in KOH)/(mg/g) 60 to 80 Appendix A A.3 Sodium, w /% 3.5 to 5.0 Appendix A, A.4 Ester values 120 to 190 Appendix A, A.5 Total lactic acid content, w /% 23.0 to 34.0 Appendix A, A.6 Lead (Pb)/(mg/kg) ≤ 2.0 GB 5009.12

Appendix A

Testing method A.1 General provisions Unless otherwise stated, only the reagents identified as analytical reagents and the tertiary water specified in GB/T 6682 were used in the analysis. Used in the analysis Standard titration solution, standard solution for impurities determination, preparation and products, in the absence of other requirements, according to 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 Take the sample 1g, mix with water 25mL and hydrochloric acid 5mL, heating, fatty acid is released, so that the oil layer of liquid surface. Water layer Sodium test should be positive. A.2.2 Take the sample 25g, placed in a conical flask, add 50g of 15% potassium hydroxide ethanol solution, reflux 1h, or to saponification complete. After cooling, add 150 mL of water and mix well. After the solution was completely saponified, 60 mL of a sulfuric acid solution at a concentration of 0.5 mol/L was added Hot and constantly stirring to the fatty acid precipitation and was transparent liquid. Wash the fatty acids with boiling water, until the sulphate is removed, collected in a small beaker In the steam bath to warm the fatty acid and water layer completely separated, and transparent. Cooling, discard the water layer, the fatty acid melt into the dry beaker And dried at 105 ° C for 20 min. The freezing point of the refined fatty acid should be determined not less than 54 ° C by conventional methods. A.2.3 soluble in ethanol and hot grease, can be dispersed in warm water. A.3 Determination of acid value (in KOH) A.3.1 Analysis steps Weigh 1 g of the sample, placed in 125mL Erlenmeyer flask, add 25mL of neutral ethanol (in ethanol by adding 1 drop of phenolphthalein test solution, 0.1mol/L sodium hydroxide standard solution and to the pink, and keep 30s does not fade), heating the sample dissolved, cooled to room temperature, plus 5 drops of phenolphthalein test solution, and then quickly with 0.1mol/L sodium hydroxide standard solution titration to pink, and maintain 30s does not fade as the end. A.3.2 Calculation of results Acid value (in KOH) w1 mg per gram (mg/g) calculated according to formula (A.1) w1 = M × V × c (A.1) Where. M - the molar mass of potassium hydroxide in grams per mole (g/mol), [M (KOH) = 56.10]; V - the volume of 0.1 mol/L sodium hydroxide standard solution consumed in titration, in milliliters (mL); c - the concentration of sodium hydroxide standard solution used in the titration process in moles per liter (mol/L); m --- the quality of the sample, in grams (g). The results of the test are based on the arithmetic mean of the parallel measurement results. A.4 Determination of sodium A.4.1 Analysis steps A.4.1.1 Preparation of lanthanum stock solution 5.86 g of lanthanum oxide (La2O3) was weighed, placed in a 100 mL volumetric flask, moistened with water, slowly added 25 mL of hydrochloric acid, rotated to dissolve After the water volume to the scale, mixing. A.4.1.2 Preparation of sodium stock solution Weighed 1.271 g of sodium chloride, which was dried at 105 ° C for 2 h in advance, and placed in a 500 mL volumetric flask and allowed to settle with a volume uniform. Sodium stock solution per ml of sodium 1mg (1000mg/kgNa). A.4.1.3 Preparation of standard solutions Take three 100mL volumetric flasks, add 10.0mL lanthanum stock solution. Add 0.20 mL to the first volumetric flask with a microliter syringe Sodium stock solution, in the second only by adding 0.40mL, in the third only by adding 0.50mL, and then diluted with water volume and mix. The capacity The capsules were 2.0 μg, 4.0 μg and 5.0 μg, respectively. Need to prepare the day. A.4.1.4 Preparation of sample solution Accurately weighed 250mg sample, into the 30mL beaker, add 10mL of hot ethanol, dissolved into the 25mL volumetric flask, with B Alcohol washed beaker 2 times, each 5mL, lotion into the volumetric flask, and then mixed with ethanol volume. Another lanthanum storage solution 2.5mL, into the first Two 25mL volumetric flask, with a microliter syringe to take the first volume of the bottle in the sample of ethanol solution 0.25mL, adding a second capacity flask, And then mixed with water after volume. A.4.2 Analysis and calculation of results The standard solution and sample solution were measured at a wavelength of 589 nm using a suitable atomic absorption spectrophotometer according to the procedure specified by the instrument At the absorbance. According to the standard solution of different sodium concentration and absorbance draw the standard curve, according to the sample solution of sodium concentration c (μg/mL), and then the sodium content (mg) in the sample was determined at a concentration of 2.5 times sodium. A.4.3 Precautions In this test can not use conventional glass equipment, so as not to be sodium pollution, if necessary, the use of appropriate plastic (such as polyethylene) containers. A.5 Determination of ester value A.5.1 Analysis steps A.5.1.1 Preparation of sample solution A.3 Neutral solution retained in acid value analysis. A.5.1.2 Determination The neutralization solution retained in the acid value analysis was added with 10 mL of potassium hydroxide in ethanol (11.2 g of potassium hydroxide dissolved in 250 mL of B Alcohol and diluted with 25 mL of water). Add 5 drops of phenolphthalein indicator solution, installed on the condenser, reflux 2h, after cooling plus 5 drops of phenolphthalein indicator solution, The excess base was titrated with 0.05 mol/L sulfuric acid solution. Prepare a blank test with 10.0 mL of potassium hydroxide in ethanol. A.5.2 Calculation of results Ester value w2, calculated according to formula (A.2). w2 = M × (V0 - V1) × c1 m1 (A.2) Where. M - the molar mass of potassium hydroxide in grams per mole (g/mol), [M (KOH) = 56.10]; V0 - The volume of 0.05 mol/L sulfuric acid solution consumed in the titration sample in milliliters (mL); V1 --- titration blank liquid consumption of 0.05mol/L sulfuric acid solution volume, in milliliters (mL); c1 - the molar concentration of the sulfuric acid solution used in the titration process, in moles per liter (mol/L); m1 --- the quality of the sample, in grams (g). The results of the test are based on the arithmetic mean of the parallel measurement results. A.6 Determination of total lactic acid content A.6.1 Analysis steps A.6.1.1 Preparation of standard stock solutions Weigh 1.067g lithium lactate (LiC3H5O3), dissolved in water and then set to 1000mL. A.6.1.2 Preparation of standard solutions Respectively, the standard stock solution 1.0mL, 2.0mL, 4.0mL, 6.0mL and 8.0mL, each into the 100mL volumetric flask, with water Set and mix. Respectively, 1.0mL of the above solution, placed in five test tubes, the test tube in the standard solution of lactic acid concentration were 1 [mu] g/mL, 2 [mu] g/mL, 4 [mu] g/mL, 6 [mu] g/mL and 8 [mu] g/mL. A.6.1.3 Preparation of sample solution Accurately weighed.200mg sample, into the 125mL conical flask, add 0.5mol/L potassium hydroxide ethanol solution 10mL and water 10mL, equipped with air condenser, slow reflux 45min, water about 40mL washing condenser and bottle, in the steam bath heated to no B Alcohol odor, add 1. 2 dilute sulfuric acid 6mL, heated to the fatty acid to melt, and then cooled to about 60 ℃, add 25mL petroleum ether, slowly rotating mixed The solution was immediately transferred to a separatory funnel and the aqueous layer was collected in a 100 mL volumetric flask. Wash the petroleum ether layer twice with water, wash every 20 mL Liquid into the volumetric flask. Diluted with water to 100 mL and mixed. Take this solution 1.0mL, into the 100mL volumetric flask, after the volume of water mixing. A.6.2 Analysis and calculation of results Draw a 1.0 mL sample solution and place in a test tube. Another 1.0 mL of water into the test tube as a control. Take this two tube solutions and A 6.1.2 of the test tubes containing the standard solution are treated as follows. a) add 1 drop of copper sulfate test solution, quickly add 9.0mL sulfuric acid, slow rotation, release test tube plug, heated in 90 ℃ water bath 5min Immediately after cooling in ice water bath 5min to 20 ℃ below, add 3 drops of p-phenyl phenol test solution, immediately shake, in 30 ℃ water bath Heating for 30 min, shaking twice during this time to disperse the reagent. b) Place the tube in a 90 ° C water bath for 90 s and remove it immediately into ice water to quickly cool to room temperature. Sheng in 1cm absorption The absorbance was measured at 570 nm with an appropriate spectrophotometer. According to the standard curve can be obtained from the sample solution In the amount of lactic acid (μg). ...