IGNOU MCH 2 2018 - Discuss various ways in which multiple extractions are carried out.

Question

Discuss various ways in which multiple extractions are carried out.

08 Mar 2018

Answer :

Word Count : 406

One prefers to extract 100% of the analyte during LLE. In some cases, this can be accomplished in a single extraction as discussed in The requirement for this is that the partition ratio is relatively large. If not, the volume Of the organic phase can be increased as illustrated in to compensate for the poor partition ratio. However, another way Of increasing the recovery, which is even more effective. is to extract the aqueous sample with several fresh portions of organic solvent, and after that the different portions Of organic solvent are combined. This is called muliple pH conditions from Image ignouacademy-com--p-discuss-44023 with the partition ratio K_D and whare the praction of A remaining in the sample after LLE is q. Initially, m moles of A was present in

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