Hallo,

I have produced citric acid crosslinked samples of magnesium and sodium lignosulphonates and tried to precipitate my samples as they were water soluble during washing .I tried to preciptate with 0,1M , 1M and 2M HCl but none of it caused precipitation of my sample.The pH of the crosslinked sample was between 3-4.

Could anybody please suggest any other methods to precipitate the sample or a possible reason for no precipiation.

Thank you very much