This can be accomplished by slowly discharging gas into a scrubber or other suitable vessel containing a 15 percent solution of alkali (e. g. sodium hydroxide) and water.

• 这可以通过慢慢地把气体排入装有15%25的碱（如氢氧化钠）和水的溶液的擦洗器或其它合适的容器来实现。