GB 5009.229-2016 Translated English of Chinese Standard. GB5009.229-2016: National Food Safety Standard - Determination of Acid Value in Foodshttps://www.chinesestandard.net, 2 déc. 2017 - 22 pages This Standard specifies the three methods for the determination of acid value in all kinds of foods - the cold solvent indicator titration method (Method I), the cold solvent automatic potentiometric titration method (Method II), and the hot ethanol indicator titration method. |
Table des matières
| 4 | |
Application Scope | 5 |
Reagents and Materials | 6 |
Apparatus | 7 |
Expression of Analytical Results | 9 |
Precision | 10 |
Analytical Procedures | 11 |
Expression of Analytical Results | 14 |
Expression of Analytical Results | 15 |
Annex A Impurity Removal and Dehydration of Specimens of Fatoil | 16 |
Expressions et termes fréquents
acid value alkali blue 6B anhydrous sodium sulphate automatic potentiometric titrator blank test burette completely while rotating condition of 0.08 conical flask contained to dry crushed as specified dehydration as specified determination of acid diethyl ether edible fat-oil emulsified end point fat-oil as specimens Figure E.1 filtration first-order differential-curve free fatty acid fully stir higher than 45°C impurity removal indicator titration method isopropanol layered or precipitated magnetic stirrer mg/g ml/drop negative pressure condition oilseeds petroleum ether pH abrupt pH-titration volume real-time place fat-oil point of titration potassium hydroxide r/min Reagents removal and dehydration residual liquid fat-oil rice bran oil rotary evaporator S-shaped pH-titration volume sample solution samples of fat-oil smashing solid fat-oil solidifying point specified in A.1 specified in Annex specimens of fat-oil standard titration solution stir bar temperature thermostatic drying box titration as shown titration solution 3.2.1 titration solution consumed treated by impurity volume real-time change-curve water bath