Waste gas absorption bottle adopting kjeldahl method to detect protein

The utility model provides a waste gas absorption bottle adopting the kjeldahl method to detect protein. The waste gas absorption bottle adopting the kjeldahl method to detect protein comprises a bottle body (12), a waste gas air inlet pipe (14) and an air suction pipe (16), wherein the bottle body is provided with an accommodating chamber (10); the waste gas air inlet pipe is communicated with the accommodating chamber of the bottle body; the air suction pipe is arranged above the bottle body and communicated with the accommodating chamber; the waste gas air inlet pipe is communicated with the accommodating chamber via the side wall of the bottle body; the part in which the waste gas air inlet pipe is communicated with the accommodating chamber is near the bottom of the bottle body; one end, positioned inside the accommodating chamber, of the waste gas air inlet pipe is covered with a filter screen (15); a check valve (18) is arranged on a pipeline, positioned outside the accommodating chamber, of the waste gas air inlet pipe. According to the waste gas absorption bottle provided by the utility model, waste gas produced by the kjeldahl method to detect protein enters the accommodating chamber from the bottom of the bottle body, so that the waste gas can be sufficiently absorbed by alkaline liquid inside the accommodating chamber and the quantity of acidic gas entering a circulation water vacuum pump from the air suction pipe is effectively reduced.