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vervolgens 30 ml azijnzuur anhydride toevoegen en onder terugvloeikoeling gedurende 2 uren laten koken .
then add 30 ml acetic anhydride and boil for two hours so that the liquid flows back after condensation .
Last Update: 2019-05-31
Usage Frequency: 1
Quality:
gedurende 1 uur onder terugvloeikoeling laten koken met 3 ml watervrij pyridine en 3 ml azijnzuur anhydride .
boil for one hour with 3 ml pyridine and 3 ml acetic anhydride so that the liquid flows back after condensation .
Last Update: 2019-05-31
Usage Frequency: 1
Quality:
verwarm gedurende 30 min . bij 70 - 80 * c onder terugvloeikoeling en koel vervolgens in stromend water .
heat for 30 minutes at 70-80 ºc under a reflux condenser and then leave to cool under a stream of water.
Last Update: 2019-05-31
Usage Frequency: 1
Quality:
vervolgens het monster extraheren in water (50 ml/g monster) door onder terugvloeikoeling te koken gedurende 30 minuten.
then extract the sample in water (50 ml per g of sample) by boiling under reflux for 30 minutes.
Last Update: 2017-04-06
Usage Frequency: 2
Quality: