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Thermo Fisher Scientific Ion Selective Electrodes Lead User Manual

Page 14

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6.

The sulfate ion concentration from the unknown is calculated as follows:

Vt Mt

MSO

4

-2

=

⎯⎯⎯⎯⎯

VSO

4

-2


where:
MSO

4

-2

= concentration of sulfate ion in the unknown (moles/liter)

Vt

= volume of lead added at endpoint

Mt

= lead concentration (moles/liter)

VSO

4

-2

= volume of unknown sample (50 ml)