The results of determining the alkaline and alkalineearthmetals in the treated gasoline showed there was no loss of metals from the catalysts.
对脱砷-加氢-脱氯汽油中碱金属和碱土金属的测定结果表明，不存在催化剂的金属流失问题。
2
All alkalineearth elements have an oxidation number of +2, making them very reactive. Because of their reactivity, the alkalinemetals are not found free in nature.
所有的碱土金属元素的化合价都是+2，这使他们非常活泼，因为他们非常活泼，也不在自然界中直接出现。
3
But the fact that the excess bariums are responsible for electron emission may be reconciled with the deficiency of alkalineearthmetals during life by the dynamical surface emission center model.