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two-stage extraction
Two-stage extraction preconcentration and HPLC determination of phenol and 1-naphthol in aqueous solutions
      
All blocks with individual background intensity values in a document image are first extracted using a two-stage extraction procedure.
      
After two-stage extraction separation, chemical yield of 90Y in the final aqueous phase was roughly 80%, while 90Sr radionuclide impurity in this phase containing carrier-free 90Y was 10-6%.
      
A two-stage extraction process for regenerating zinc from wash water in the manufacture of viscose fibres has been worked out on a pilot set-up.
      
Determination of Solute-Polymer Interaction Properties via Two-Stage Extraction
      
In the second stage, comprehensive testing based on two-stage extraction algorithm is applied to sampling pages, the result is listed in table.
      
Space focussing is obtained with a two-stage extraction set-up and compensates for the different locations where ions are formed.
      
 

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