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|Title:||LIQUID-LIQUID-EXTRACTION OF ZIRCONIUM FROM HAFNIUM AND OTHER ELEMENTS WITH DICYCLOHEXYL-18-CROWN-6|
|Publisher:||ELSEVIER SCIENCE BV|
|Citation:||ANALYTICA CHIMICA ACTA, 245(1), 27-33|
|Abstract:||Zirconium was quantitatively extracted with 2.5 x 10(-2) M dicyclohexyl-18-crown-6 in dichloromethane from 8.5 M hydrochloric acid. It was stripped with 0.5 M hydrochloric acid and was determined spectrophotometrically as its complex with Arsenazo III. Hafnium was not extracted under these conditions, but from the residual aqueous phase it was extracted with 7.0 x 10(-2) M dicyclohexyl-18-crown-6 in dichloromethane from 9.0 M hydrochloric acid. It was stripped with 0.1 M perchloric acid and determined spectrophotometrically at 540 nm as its complex with xylenol orange. The separation of zirconium and hafnium from other metals is also described.|
|Appears in Collections:||Article|
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