Optical detection chip and optical detection system

An optical detection system for measuring a concentration of a gas subject to detection comprising at least one of hydrogen sulfide or methyl mercaptan, the system comprising:

• a dehumidifying filter that removes moisture from outside air to be introduced to produce dry gas;
• a sealed container that encloses the gas subject to detection that has been collected;
• a pusher block and a motor that transports the gas subject to detection from the sealed container;
• electromagnetic valves that switch a first passage to a second passage, and first and second optical detection devices each comprising a light-emitting diode and a photodiode,
• wherein in the first passage, the gas subject to detection is passed through a first filter that removes ammonia and phenol and the resulting gas subject to detection is brought into contact with a curved surface portion of a first optical detection chip and, in the second passage, the gas subject to detection is passed through a second filter that removes ammonia, phenol, and hydrogen sulfide and the resulting gas subject detection is brought into contact with a curved surface portion of a second optical detection chip.