Christopher Dumalasa

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Questions related from Christopher Dumalasa

What other acids/chemicals can I use in Organic chemistry to prepare crystalline salts of organic bases aside from using picric acid?

I extracted the NAMI tubers with 95% ethanol by cold maceration. The extract was concentrated under reduced pressure until dryness then I dissolved it in 5% acetic acid. The acid supernatant was...

25 February 2020 4,060 3 View

What other acids/chemicals can I use in Organic chemistry to prepare crystalline salts of organic bases aside from using picric acid?

I extracted the NAMI tubers with 95% ethanol by cold maceration. The extract was concentrated under reduced pressure until dryness then I dissolved it in 5% acetic acid. The acid supernatant was...

02 February 2020 1,564 1 View

Can i replace acetone with ethyl acetate as an eluent in silica gel column chromatography?

I have a mixed solvent of acetone: water: ammonia (90:7:10), can I replace the acetone with ethyl acetate as an eluent and purify my alkaloid which is a polar compound?

30 January 2020 324 7 View

What are the alternative eluents for purifying alkaloids in column chromatography?

I have a picrate that is made alkaline by ammonia followed by extraction with dichloromethane until the base was exhausted. The required eluent for the silica gel column chromatography is acetone:...

26 January 2020 5,675 7 View