GB 5413.20-2013 Translated English of Chinese Standard. GB5413.20-2013: National Food Safety Standard Determination of choline in infant foods and dairy productshttps://www.chinesestandard.net, 17. jan. 2015 - 12 sider This Standard specifies the determination method for the choline in the infant food and dairy food. This Standard is applicable to the determination for the choline in the infant food and dairy food. |
Innhold
| 3 | |
Scope | 4 |
Instruments and equipment | 5 |
Analytical steps | 6 |
Expression of analysis results | 7 |
Precision | 9 |
Vanlige uttrykk og setninger
0.100 Distilled water 100mL conical flask 100mL volumetric flask 10mL of hydrolysed 20°C for preservation 20g accurate absorption value Tube accurate to 0.01g acetone activity-unit Add reagent according ammonium reineckate solution Barium hydroxide barium hydroxide-methanol-trichloromethane choline ammonium reineckate Choline bitartrate C9H19NO7 choline hydroxide standard chromatographic column chromogenic agent concentrated hydrochloric acid content of choline dairy food determination results obtained draw standard curve Expression of analysis Filtrate fix the volume flask with grinding florisil food and dairy Glacial acetic acid grade III grinding mouth hectogram mg/100g hydrolysis extraction infant food light absorption value methanol Methyl acetate millilitre Mix evenly Number obtained under repeatability Peroxidase Phenol Phospholipase pink choline ammonium Reagent addition amount reflux device Reinecke salt spectrophotometric Sample preparation sealing protective film sensitivities are 0.01g Sodium hydroxide solution of choline specified in GB/T Standard substance temperature of 102°C±2°C test tubes total light absorption Trichloromethane uniformly mixed sample unit is mL water is grade