preconcentration

基本解釋

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(yù)選設(shè)備X射-線分選機的組成、工作原理及其測量操作系統(tǒng)。
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(shù)經(jīng)濟初步分析的基礎(chǔ)上探討了預(yù)選工藝對某銀鉛鋅鑛開發(fā)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(yù)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(fā)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(yù)処理是不可缺少的重要環(huán)節(jié)。
預(yù)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(xiàn)性,能夠成功地用於兩性離子的預(yù)富集。
預(yù)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(lián)用的微型柱內(nèi)，實現(xiàn)了貴金屬的自動在線預(yù)濃集與測定。
濃縮