Chemical equilibria and sequential extractive spectrophotometric determination of selenium(IV) and (VI) using the chromogenic reagent 4,4′-dichlorodithizone

2006 ◽  
Vol 86 (12) ◽  
pp. 941-954 ◽  
Author(s):  
Mohammad S. El-Shahawi ◽  
Abdelhameed M. Othman ◽  
Abdulaziz S. Bashammakh ◽  
Mervat A. El-Sonbati
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