Supercritical fluid separation apparatus
AssigneeShimadzu Corporation
InventorMichiaki Owa
Life of this patent
Estimating the term…
Abstract
A supercritical fluid separation apparatus performs feedback control of output of a heater so that a separation part temperature becomes a set temperature, based on both output of a first temperature sensor that measures a heating block temperature and output of a second temperature sensor that measures the separation part temperature. When a difference between the separation part temperature and the set temperature is large (equal to or more than a predetermined value), output of the heater is adjusted based on the heating block temperature. When a difference between the separation part temperature and the set temperature becomes small (less than a predetermined value), the output of the heater is adjusted based on the difference.
Claims4
A supercritical fluid separation apparatus, comprising:
- a mobile phase delivering channel for delivering a mobile phase;
- a back-pressure control valve that is connected downstream of the mobile phase delivering channel and controls pressure in the mobile phase delivering channel so that a mobile phase flowing through the mobile phase delivering channel becomes a supercritical state;
- a separation part that is provided between the mobile phase delivering channel and the back-pressure control valve, and separates sample components with a mobile phase delivered from the mobile phase liquid channel;
- a heating block that includes a heater, and is provided so as to be directly or indirectly in contact with the separation part to transfer heat generated by the heater to the separation part;
- a first temperature sensor provided so as to measure a temperature of the heating block;
- a second temperature sensor provided so as to measure a temperature of the separation part;
- a set temperature storage part that stores a set temperature for the separation part;
- and
- a temperature control part configured to feedback-control an output of the heater so that a temperature of the separation part becomes the set temperature stored in the set temperature storage part,
- wherein the temperature control part is configured to determine whether or not a difference between the set temperature and the temperature of the separation part measured by the second temperature sensor is equal to or more than a predetermined value which is more than zero,
- wherein the temperature control part is configured, in a case where the difference is equal to or more than the predetermined value, to adjust output of the heater based on the temperature of the heating block measured by the first temperature sensor, and
- wherein the temperature control part is configured, in a case where the difference is less than the predetermined value, to adjust output of the heater based on the difference.
Dependencies are inferred from the claim text.