Abnormality sensing method and abnormality sensing device

An abnormality sensing method comprising:

• an abnormality sensing device that reads a first current value from a first current meter connected, between a first path through which a voltage applied by a voltage source conducted and the voltage source, series with the first path and the power source carries out
• a standard deviation calculation step for calculating a standard deviation of the first current value;
• and
• a first determination step for outputting the occurrence of discharge is at a second path;
• which is a path other than the first path and at the same time, is an insulated portion when the standard deviation is greater than a first threshold value which is a predetermined threshold value, wherein
• the first path is provided in an abnormality monitored device that is a capillary electrophoresis device,
• the first current meter is connected to a load header, and
• the second path is between the load header and a cathode buffer container or between the load header and a buffer solution contained in the cathode buffer container.