Method for detecting water hardness and trace elements in sewage

The invention discloses a method for detecting water hardness and trace elements in sewage, and relates to the technical field of water quality detection. The method comprises the following steps: S1, sampling; S2, sample pretreatment; S3, hardness detection: heating the water sample to 30-40 DEG C, then uniformly mixing the water sample through magnetic stirring, and inserting a hardness test electrode into the water sample for detection; S4, trace element detection: detecting the content of trace elements in the water sample by an inductively coupled plasma mass spectrometer; and S5, carrying out analysis processing on hardness and trace element detection data through a computer. Through multi-position and multi-depth detection of the sewage area, the detection accuracy is improved, data correctly reflecting real water hardness and trace elements of the sewage area can be obtained, traditional hardness and trace element detection is combined with an existing computer data analysis method, and related errors