I am new to this forum. I have to analyse various compound groups present in soil organic matter (SOM). There SOM should be extracted from soil. In extraction of SOM from soil, the final stage is to pass the soil sample to ion exchange resin (Amberjet 1200 H or Dowex 50 WWx8) . It will be really nice if someone provide me a diagrammatic set-up along with name of apparatus required. After ion exchange, the sample has to freeze dried and then analysis using NMR.