GB 1886.1-2021 Translated English of Chinese Standard (GB1886.1-2021): National food safety standard - Food additives - Sodium carbonate
www.ChineseStandard.net, 30 lug 2021 - 18 pagine
This Standard is applicable to anhydrous sodium carbonate as a food additive produced by the Hou-Soda method, ammonia-soda method or trona processing method. At the same time, it is also applicable to the food additive sodium carbonate decahydrate produced by recrystallization of food additive anhydrous sodium carbonate.
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50mL of water absolute difference according to formula acid standard titration Analysis steps Anhydrous sodium carbonate arithmetic mean blank test solution blue indicator solution bromophenol blue indicator Buchner funnel calcium oxide calculated according calculation The mass constant mass constant temperature drying determination results obtained dry basis end point Erlenmeyer flask food additive fraction of ignition Gooch crucible grams g heating constant temperature hydrochloric acid standard independent determination results liter mol/L Magnesium sulfate mass fraction mercury nitrate standard Method summary milliliters mL molar mass moles per liter nearest of 0.01g nitrate standard titration nitric acid solution obtained under repeatability parallel determination results phenolphthalein pickled asbestos Place the Gooch potentiometer Reagents and materials relative atomic mass repeatability conditions Result calculation silver nitrate standard sodium carbonate decahydrate solution to titrate specified in GB/T specimen mass specimen solution standard titration solution titration solution consumed total alkali content volume volumetric flask water to dissolve