selective extraction中文什么意思

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Chemical analysis of zinc ores concentrates . accurate determination of zinc by complexometric titrimetry after selective extraction of zinc
鋅礦石精礦的化學(xué)分析.鋅選擇提取后用絡(luò)合滴定法進行鋅的精確測定
Solvent refined a refining technique to improve the quality of based oils using selective extraction of undesirable components by means of solvents
溶劑精制-利用溶劑作為于段(利用溶劑方式？ ) ，有選擇性地萃取不需要的組份，進而提高基礎(chǔ)油質(zhì)量的一種精制工藝。
Choosing the atomic absorption spectrometry as a basic analytic method and icp / ms as a contrast method and using the sequential selective extraction schedule , the characteristics of weak geochemical signals from deeply concealed deposits were studied in loess covered jiaolongzhang polymetallic deposit and zhangquanzhuang gold deposit
本文采用原子吸收法作為基本分析方法，并以icp ms為比較方法，通過選擇性循序提取試驗，研究了甘肅蛟龍掌多金屬礦和河北張全莊金礦黃土覆蓋條件下，地表黃土中地球化學(xué)弱信息特征。

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