GB 5009.239-2016 Translated English of Chinese Standard. GB 5009.239-2016: National Food Safety Standard - Determination of Acidity in Food [Buy--download True-PDF in 3-second: https://play.google.com/books > Sign in > This BOOK > "3-dots" > Export > Save as "*.pdf"]This Standard specifies the methods for the determination of acidity in milk and milk products, starch and derived products, grain and grain products. The first method of this Standard applies to the determination of acidity in milk and milk products, starch and derived products, grain and grain products; the second method applies to the determination of acidity in milk powder; the third method applies to the determination of acidity in milk and milk products. |
Contents
| 3 | |
Application Scope | 4 |
Apparatus | 5 |
Analytical Procedure | 6 |
Expression of Analytical Results | 10 |
Accuracy | 13 |
Apparatus | 14 |
Expression of Analytical Results | 15 |
Accuracy | 16 |
Common terms and phrases
0.1 mol/L sodium 250 mL conical absorbing carbon dioxide accordance with Formula accurate to 0.001 acidity of specimen arithmetic mean value blow nitrogen Casein Cobalt sulfate colour is similar concentration of sodium consumed during blank consumed during titration Determination of Acidity determinations under repeatable Diethyl ether ethanol-diethyl ether mixture expressed in mL expressed in mol/L finished within 45 flask to prevent flask while adding g accurate g of specimen hydroxide standard solution hydroxide standard titration independent determinations lactic acid Magnetic stirrer mass of specimen milk powder millimetres of sodium mL conical flask mL of water mol/L sodium hydroxide molar concentration neutral ethanol-diethyl ether nitrogen to conical phenolphthalein indicator potassium hydroxide prevent solution absorbing Record the millimetres reference solution repeatable conditions rotate the flask sodium hydroxide solution sodium hydroxide standard solution absorbing carbon specimen mixed standard solution consumed standard titration solution substitute into Formula Trichloromethane volume of sodium whey powder whole titration process