Patent ID: 11940430
Assignee: SHIMADZU CORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC G  B | IPC B  G

Claim 7:
8. A method for determining a breakthrough point of an ion exchange resin in an ion exchange resin column, comprising:
irradiating light from a direction across a longitudinal direction of the ion exchange resin column, which includes a resin accommodation unit in which the ion exchange resin is accommodated, toward the ion exchange resin;
detecting the irradiated light transmitted through the ion exchange resin column by a light detector;
detecting a volume change of the ion exchange resin in the resin accommodation unit, which occurs when the ion exchange resin reaches the breakthrough point by detecting that an output signal of the light detector exceeds a predetermined threshold or by detecting that the output signal of the light detector is below a predetermined threshold; and
determining the breakthrough point of the ion exchange resin by detecting the volume change of the ion exchange resin.