Injection apparatus and injection method for liquid sample for standard gas production

An injection method for liquid for standard gas production using an injection apparatus that is connected to an inlet of a standard gas container to supply a liquid sample and diluting gas to the inlet of the standard gas container and gasifies the liquid sample to inject the gasified liquid sample to the standard gas container, the injection apparatus for liquid for standard gas production comprising:

• a syringe including a needle to inject the liquid sample;
• a liquid injection part connected to the inlet of the standard gas container extending in a vertical direction, and including a penetration path extending in a horizontal direction so that the needle penetrates therethrough and communicating with the inlet of the standard gas container;
• and
• a standard gas preparation device connected to the inlet of the standard gas container through a gas transfer passage which is in communication with the penetration path to inject a diluting gas supplied from a diluting gas cylinder or to perform a vacuum evacuation of the standard gas container, the injection method for liquid for standard gas production comprising:
• evacuating the liquid injection part, the standard gas preparation device, and standard gas container;
• collecting the liquid sample in the syringe;
• replacing the needle of the syringe;
• measuring a mass of the syringe in which the liquid sample is contained;
• inserting the needle into the penetration path of the liquid injection part to position the tip of the needle in the inlet of the standard gas container;
• evacuating the needle;
• volatilizing and gasifying the liquid sample contained in the syringe while injecting into the standard gas container;
• calculating an injection amount of the liquid sample by measuring the mass of the syringe after the liquid sample is injected;
• and
• injecting the diluting gas into the standard gas container through the standard gas preparation device.