Method for detecting total mercury in disabled mercury remover

The invention provides a method for detecting total mercury in a disablbed mercury removal agent, which comprises the following steps: pretreatment of the failed mercury removal agent: adding hydrochloric acid and nitric acid into the crushed disabled mercury removal agent, performing standing, performing shaking uniformly, carrying out water bath heating on the obtained mixture, and cooling; fixing the volume of the obtained solution to a target volume by using a dilute nitric acid solution, performing oscillating and shaking up, and diluting the solution after volume fixing step by step by using the dilute nitric acid solution; detection and calculation: preparing mercury standard stock solutions with different concentrations by adopting a dilute nitric acid solution, and carrying out inductively coupled plasma mass spectrometry detection on the mercury standard stock solutions with different concentrations according to the sequence of concentrations from small to large; drawing a mercury concentration stan