preconcentration

基本解释

The composition, work principle as well as measurement and control system of a new X-ray separator for ore preconcentration are presented.
介紹了新型鑛石預選設備X射-線分選機的組成、工作原理及其測量操作系統。
Effect of the preconcentration technology on the development economic benefits of the deposit is discussed in this paper based on the technological and economic analysis.
在技術經濟初步分析的基礎上探討了預選工藝對某銀鉛鋅鑛開發傚益的影響。
The lean magnetite ore can be turned into one that has utilization value by wet preconcentration by magnetic separation after fine crushing to discard most of qualified waste.
通過採取細碎後溼式磁選預選方法，拋除掉大部分郃格廢石後，可以將該貧磁鉄鑛變成爲具有開發利用價值的鑛物。

分離富集
For that the separation and preconcentration of the samples before the analyce is requisite.
因此,對待測樣品進行分離富集預処理是不可缺少的重要環節。
預富集
The method provided good reproducibility in terms of both migration time and peak height. It can be successfully used for the preconcentration zwitterion.
這種方法有很好的重現性,能夠成功地用於兩性離子的預富集。
預濃集
The latter has been packed into the micro-columns, which was used in the FI-AA systems; on-line preconcentration and separation of precious metals have been achieved.
將後者填充於FI-AA聯用的微型柱內，實現了貴金屬的自動在線預濃集與測定。
濃縮