Inspection apparatus and inspection method

An inspection apparatus comprising:

• a sampling portion that receives a sample tube where sample water is stored and takes the sample water;
• a treatment unit that treats taken sample water;
• a measurement unit that measures a conductive property of treated sample water;
• a flow-in tube for introduction of the sample water into the measurement unit;
• a liquid sending portion that generates drive force for sending the sample water in the sample tube to the measurement unit;
• a gas feed portion that sends gas into the sample tube to pressurize inside of the sample tube;
• and
• a controller that controls operations of the liquid sending portion and the gas feed portion, wherein
• the controller controls the operations of the liquid sending portion and the gas feed portion to send the sample water to the measurement unit through the flow-in tube while the inside of the sample tube is pressurized with the gas;
• and
• the gas feed portion includes a gas needle inserted in the sample tube, the gas needle introducing the gas into the sample tube;
• the controller maintains a pressure in the sample tube in a state higher than an atmospheric pressure, and a length of the gas needle is such that a gas injection port of the gas needle is located above the liquid level of the sample water.