A: How can we achieve the secernment of these two elements?
A：我们如何实现这两种元素的分离？

B: We need a specific chemical process for its secernment.
B：我们需要一个特定的化学过程来进行它的分离。

1) 分离

2) 辨别

3) 甄别

1. 分离；区分

noun

1. The act or process of separating or distinguishing something from others.

Synonym: separation, distinction, segregation