I had read the article entitled 'Synthesis by precipitation polymerization of molecularly imprinted polymer for the selective extraction of diclofenac from water samples' written by Chao-Meng Dai et al. and it said this but still I could not understand. It seems the procedure is not very clear.

'DFC was extracted into chloroform from an acidic solution in

order to obtain its acid form'.

I want the diclofenac acid to be in solid form.

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