Matched context for impurity and oxygen

The page lists matched contexts for impurity and oxygen.

Share - impurity	Share - oxygen	Phrase
4.42%	14.39%	{impurity or oxygen} concentration
5.76%	0.56%	contain {impurity or oxygen} [perform operation]
3.81%	0.15%	gaseous [state] {impurity or oxygen}
2.18%	0.31%	liquid [state] {impurity or oxygen}