ALTERNATE PROCEDURE FOR DISPERSING SMECTITES IN C-B
BUFFER
- In place of Steps 2
and 3 in the original procedure, add 20 mL
of high purity H2O
(18 Mohm-cm
resistivity)
to the smectite. Allow the sample to
disperse by shaking gently overnight. This provides
for gentle dispersal. Sonification
should be avoided if possible.
- Add
10 mL
of C-B buffer, which is prepared by combining 2 parts of 1.2 M
sodium citrate (from the dihydrate
salt) with 1 part of 1 M
sodium bicarbonate.
- Return
to Step 5 of the original procedure.