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Table 1 Extraction for the use of different solvent details

From: Determination of enantiomer impurity in Bortezomib lyo injection formulation by using normal-phase liquid chromatography

S. no.

Solvent name

Appearance of solution, clear solution (yes/no)

Observations

1

Methanol

No

Observed Bortezomib peak response was very low.

2

Ethanol

No

Observed Bortezomib peak response was very low.

3

Dimethyl formamide

Yes

Bortezomib peak response was not detected.

4

Dimethyl sulfoxide

Yes

Bortezomib peak response was not detected.

5

Chloroform

No

Observed Bortezomib peak response was very low.

6

Ethyl acetate

No

Observed Bortezomib peak response was very low.

7

Water

Yes

Further, chloroform added to the aqueous clear solution and extracted the Bortezomib. Observed Bortezomib peak response was found not satisfactory.

8

Water

Yes

Further, ethyl acetate added to the aqueous clear solution and extracted the Bortezomib. Observed Bortezomib peak response was found satisfactory.