| CPC G01N 33/1853 (2013.01) [G01N 1/38 (2013.01); G01N 27/423 (2013.01)] | 20 Claims |

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1. A method for stirring a sample in a cell, comprising:
providing a cell comprising a sample chamber;
placing a boron-doped diamond electrode on an inner surface of the sample chamber,
placing a removable stir bar in the sample chamber, the removable stir bar directly contacting and touching the boron-doped diamond electrode; and
wherein the stir bar can be operated to rotate within the sample chamber upon the boron-doped diamond electrode.
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