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pH values measured for the salt solutions and<br />
the muds<br />
Mud/solution no. pH in salt solution pH in mud slurry<br />
1 7.1 3.8<br />
2 3.2 3.1<br />
3 5.5 3.9<br />
4 4.0 3.6<br />
5 4.2 3.7<br />
<br />
<br />
<br />
Technical difficult to conduct pH measurement underneath a ‘dry’ mud film.<br />
Clean sand might be washed in HCl<br />
Kaolin affects pH<br />
Date: 2004-01-13 • Page: 13 • Hydro Aluminium
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