I now extract 20 gram soil by hot/cold water by 30 mins shaking and 30 mins centrifuge. One of the parameters for analysis is δ 13C. I need to freeze dry extract to get the solid matter for measuring. However, after 1st extraction, the volume of extraction seems to be too little, that's why I want to do 2nd time extraction by adding water again. Anyone has experience on this field? Many thanks.
Not exactly, but you want to analyze δ13C of the OM in soil? Are you using combustion for the analyses?
I use water to extract soils then use the extract solution to freeze dry for analysing δ13C, so it is δ13C of dissolved organic matter, not really OM in the soil. Of course, measuring by combustion. I want to see how different between δ13C in DOM and SOM.
- Badges
- Science topic
- Similar topics
- Agricultural Science
- Soil Science
- Soil Analysis