Rationale of analytical separations by simple immiscible solvent extraction

✍ Scribed by E.B. Sandell

• Book ID: 102979502
• Publisher: Elsevier Science
• Year: 1950
• Tongue: English
• Weight: 598 KB
• Volume: 4
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(50)80080-6

✦ Synopsis

The general problem in separating A from B before determining A is to isolate a specified fraction of A, near unity, which may be designated as R, (the recovery factor), without isolating more than a certain absolute quantity of B, Q,,. such that QL7/QA does not exceed a specified value. The nature of the &termination decides the values of R,, and QU/Qh. I n other words, the original ratio of B to A, (Qn)o/(QJo, must be altered to the permissible ratio Qu/Q,, = Q,/R,(Q,), 2 Qa/(Q,l)o. The ratio (QJ/~(QIJo x QP/QA G QdQh will be ded the separation factor for B with respect to A. This means that the separation factor for the undesired constituent is for all practical purposes equal to its recovery factor. The smaller the separation factor the better will bc the separation.