...
- Take the <2 µm clay fraction, this should be rinsed and free of any treatments, in centrifuge tube add ~20 mL of 1N HCl
- Vortex the sample to completely dislodge all material before pouring sample into a 100 mL beaker, add stir bar once sample is in place
- Set hotplate to 300°C (boiling point of HCl is ~101, but in order to maintain a continuous boil the hotplate needs to be much hotter)
- Set the stir RPM below 100, this is only to keep the material suspended within the HCl
- Start time once the samples have come to a complete boil, leave for 2 hours — add more HCl as necessary (DO NOT, let the sample go dry and burn)
- Once the sample has boiled for 2 hours, turn off hot plate and allow sample to return to room temperature before pouring beaker contents back into a clean centrifuge tube, rinse beaker with DI water to collect all material
- Centrifuge down for 15 mins at 1500 rpm, decant acid and rinse with 25 mL nanopure (3X)
- After samples has been washed 3X and is free of HCl, centrifuge for 60 mins at 30 3000 rpm
| Anchor | ||||
|---|---|---|---|---|
|
...