English to Russian Medical Medical: Pharmaceuticals

Transfer the Sample into a 150-mL acetylation flask fitted with an air condenser.

Add 5.0 mL of Pyridine–Acetic Anhydride Reagent, and attach the air condenser.

Heat the flask in a water bath for 1 h keeping the level of the water about 2.5 cm above the level of the liquid in the flask.

Withdraw the flask, and allow to cool.

Add 5 mL of water through the upper end of the condenser.

If a cloudiness appears, add sufficient pyridine to clear it, noting the volume added.

Shake the flask, and replace in the water bath for 10 min. Withdraw the flask, and allow to cool.