Gas collection device

A gas collecting apparatus comprising:

• a constant temperature chamber having an inside, the apparatus being configured with a heater to maintain the inside at a constant temperature;
• a culture flask unit provided inside the constant temperature chamber, the apparatus being configured to culture bacteria in the culture flask unit;
• a first collecting unit provided outside the constant temperature chamber and configured to receive a first portion of a gas from inside the culture flask unit;
• a second collecting unit provided outside the constant temperature chamber and configured to receive a second portion of the gas from inside the culture flask unit;
• a first mass flow control unit provided outside the constant temperature chamber and configured to control a flow rate of the first portion of the gas into the first collecting unit;
• a second mass flow control unit provided outside the constant temperature chamber and configured to control a flow rate of the second portion of the gas into the second collecting unit;
• a discharge flow path having a first end thereof connected to a discharge port provided in the culture flask unit, the discharge flow path being configured to serve as a passage through which the gas inside the culture flask unit is discharged;
• a first flow path having a first end thereof connected to a second end of the discharge flow path and a second end thereof connected to the first collecting unit;
• and
• a second flow path having a first end thereof connected to the second end of the discharge flow path together with the first flow path and a second end thereof connected to the second collecting unit,
• wherein the first collecting unit is an adsorbent tube, and the second collecting unit is an impinger or a gas-detecting tube.