Betekenis van:
stopper

Voorbeeldzinnen

1. Stopper and shake for approximately 20 minutes.
2. Add 7,5 g molecular sieve (3.4), stopper and shake for five minutes.
3. Stopper the flask, shake, and wait at least 30 minutes, shaking occasionally.
4. Collect the sample in a suitable clean, dry container, fitted with an air-tight stopper.
5. Add 100,0 ml of acidified methanol (3.8) by pipette. Stopper loosely and swirl to disperse.
6. Stopper the flask, shake, and wait at least 30 minutes, shaking occasionally. (This is the ‘measurement’ flask.)
7. UK distributed an export denial notice in July 2009 against Machine Sazi Arak for an “alumina graphite stopper rod”.
8. Take a 300 ml flask with a ground glass stopper and with a widened neck enabling the neck to be rinsed without loss.
9. Using a pipette, add 50 ml of solvent A (3.2), stopper the flask and mix for one hour in the mixer.
10. Add 45,0 ml of water, mix, and equilibrate for 5 min. Add 105,0 ml of methanol-acetonitrile (3.5), stopper and homogenise.
11. Collect the sample in a suitable clean, dry container, fitted with an air-tight stopper. Mix thoroughly immediately before weighing out the amount for analysis.
12. Transfer to a 500 ml conical flask, add 1,00 ml internal standard solution (3.9.2), 200 ml extraction solvent (3.12) and stopper the flask.
13. Transfer to a 250 ml conical flask and add 100,0 ml of acidified methanol (3.2), stopper and shake for one hour on the shaker (4.2).
14. Dissolve the residue in 20 to 25 ml methanol (3.2), stopper the flask and retain the whole of the extract for ion-exchange chromatography (5.4).
15. Weigh to the nearest 0,01 g, from 5 g to 10 g of the sample into a 250 ml conical flask with stopper.