Spectrophotometric determination of bismuth(III and V) in water after ion-pair liquid–liquid extraction using tetramethylammonium cation as counter ion

1996 ◽  
Vol 354 (2) ◽  
pp. 200-203 ◽  
Author(s):  
M. S. El-Shahawi ◽  
S. M. Aldhaheri
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