Deaerator and electrolyte measurement system

An electrolyte measurement system comprising a deaerator, wherein the deaerator includes a first hollow fiber in which a first treatment solution is conducted from a port on one end side to a port on the other end side to cause a gas in the first treatment solution to permeate a membrane, a second hollow fiber in which a second treatment solution is conducted from a port on one end side to a port on the other end side to cause a gas in the second treatment solution to permeate through the membrane, a container, including a lid and a housing, configured to house the first hollow fiber and the second hollow fiber inside, a mesh bag arranged inside the container, wherein the first hollow fiber and the second hollow fiber are disposed inside the mesh bag, and an exhaust mechanism connected to a space in the container, wherein the lid includes a plurality of inlets connected to the first hollow fiber and the second hollow fiber, a plurality of outlets connected to the first hollow fiber and the second hollow fiber, and a vacuum pump connection port connecting the exhaust mechanism to the space in the container, over a certain length, the first hollow fiber and the second hollow fiber are in contact with each other by being spirally woven;

• and wherein outer surfaces of the first hollow fiber and the second hollow fiber are formed with a pleated surface, and the electrolyte measurement system further comprising:
• a sample container configured to hold a specimen;
• a single standard and diluting solution container configured to hold a standard and diluting solution configured for use as both a diluting solution and a standard solution;
• a control solution container configured to hold a control solution;
• a dilution tank configured to dilute a sample injected from the sample container with the standard and diluting solution;
• a control electrode configured to measure a potential of the control solution;
• an ISE electrode configured to measure a potential of the standard and diluting solution and a potential of the standard and diluting solution with which the specimen is diluted;
• a differential voltage measurement device configured to calculate a differential potential, which is a difference between the potential measured by the ISE electrode and the potential measured by the control electrode;
• an analysis device configured to analyze an electrolyte contained in the specimen based on the differential potential calculated by the differential voltage measurement device;
• a first flow path through which the control solution is fed from the control solution container to the control electrode;
• a second flow path through which the standard and diluting solution is fed to the dilution tank;
• and
• a heater disposed in contact with an outer surface of the housing;
• the deaerator including the two hollow fibers connected to the first flow path and the second flow path inside;
• wherein the housing has a tensile elastic modulus of 10 Gpa to 30 Gpa;
• wherein the housing is an outermost container of the deaerator;
• wherein the housing and the heater have cylindrical shapes such that the outer surface of the housing is in contact with an inner surface of the heater.