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L-Phenylalanine extraction from a solid matrix

Posted: Mon Dec 12, 2016 2:54 pm
by mauro-82
Hi everyone,

I'm working with solid-state fermentation of agricultural residues (like sugarcane bagasse) and I need to quantify the L-phenylalanine content in those residues. I'm able to set up and optimize a HPLC method to do so, but I'm not such confident with the sample preparation step. What I decided to do was a solid-liquid extraction using water as solvent and a further filtration through a 0.45um membrane. Have any of you deal with a similar matrix? The point is that with this simple extraction, some interferences seems to be present very close to the elution point for L-Phe and I'm not sure about the recovery of the process.

Any suggestion would be very helpful

Thanks,

Re: L-Phenylalanine extraction from a solid matrix

Posted: Thu Dec 15, 2016 5:35 am
by Don Shelly
Purify your extract using a strong cation exchange cartridge.

Load extract at pH 7
wash cartridge with numerous solvents
dry
elute with dcm/IPA/ammonia at pH 11 - 12