Digestion unit for online water quality detector

The utility model discloses a digestion unit for an on-line water quality detector, relates to the technical field of water quality detection equipment, and solves the technical problem that a digestion unit in an on-line water quality detector in the prior art is relatively low in efficiency when the chloride ion concentration is reduced. The digestion unit comprises a reaction bottle, the bottom end is provided with a liquid inlet, and the top end of the reaction bottle is provided with an exhaust port; the gas inlet pipe is mounted on the outer side wall of the reaction bottle, is communicated with the reaction bottle and is positioned at the upper part of the reaction bottle; the first heating piece is arranged on the outer side wall of the reaction bottle and is positioned at the lower part of the reaction bottle; the second heating piece is arranged on the outer side wall of the air inlet pipe; the heating temperature of the first heating piece is lower than that of the second heating piece. According t