GB 5009.121-2016 Translated English of Chinese Standard. GB5009.121-2016: Food safety national standard - Determination of dehydroacetic acid in foodshttps://www.chinesestandard.net, 23 apr 2018 - 15 pagine This Standard specifies the determination method of dehydroacetic acid in fruit and vegetable juice, fruit and vegetable pulp, pickle, fermented soy product, butter, bread, cake, baked food stuffing, compound seasoning, pre-made meat product, and cooked meat product. |
Sommario
| 3 | |
Scope | 4 |
Instruments and equipment | 5 |
Analysis steps | 6 |
Expression of analytical results | 7 |
Precision | 8 |
Principle | 9 |
Instruments and equipment | 10 |
Expression of analytical results | 13 |
Annex A Dehydroacetic acid gas chromatograph | 14 |
Annex B Dehydroacetic acid liquid chromatography | 15 |
Parole e frasi comuni
25mL volumetric flask 50mL centrifuge tube 5g of sample 7.5 with sodium accurately add 5.0 acid in sample acid solution 3.2.1 Add 10 mL Add water Adjust pH Ammonium acetate arithmetic mean Centrifuge at 4000 content of dehydroacetic dehydroacetic acid standard Determination of dehydroacetic determination of high diode array detector ethyl acetate filtering through solid flame ionization detector formic acid fruit and vegetable gas chromatography Hexane high performance liquid hydroxide solution 10.2.2 mass concentration milliliter µg/mL mL of dehydroacetic mL of hydrochloric mL of n-hexane mL of supernatant mL of water mL of zinc organic membrane perform stratification Perform ultrasonic extraction performance liquid chromatography phase extraction column r/min Reagents separatory funnel set volume Shake sodium hydroxide solution solid phase extraction solution 20 g/L Stainless steel high-speed standard working solution steel high-speed homogenizer Take 10 mL Take supernatant Ultrasonic cleaner vegetable juice vegetable pulp water and dilute Weigh 2g zinc sulfate solution