Normal and second derivative spectrophotometric determination of niobium using solid phase extraction technique

2015 ◽  
Vol 70 (9) ◽  
pp. 1103-1110 ◽  
Author(s):  
Mostafa M. Hamed ◽  
Refat F. Aglan ◽  
S. A. El-Reefy
2014 ◽  
Vol 6 (15) ◽  
pp. 5784-5791 ◽  
Author(s):  
Ali Reza Zarei ◽  
Reihaneh Hajiaghabozorgy

Schematic of the preparation of surfactant-coated MWCNT/nano-Fe3O4composites and their application for the SPE–DLLME procedure.


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