Method for simultaneously detecting content of nineteen elements in livestock manure

The invention relates to a method for simultaneously detecting the content of nineteen elements in livestock manure. The method mainly comprises the following steps: (1) sample pretreatment; (2) optimization of the working parameters of an inductively coupled plasma-mass spectrometer; (3) establishment of analysis conditions of a dynamic reaction cell; (4) detection of the content of nineteen elements in a sample solution by using the dynamic reaction cell and the inductively coupled plasma-mass spectrometer; and (5) result analysis. A sample in the invention adopts a nitric acid-hydrofluoricacid-hydrogen peroxide digestion system, and the sample is digested by pre-dissolution, microwave digestion and acid evaporation, appropriate isotopes, calibration equations and DRC technology are selected to reduce the mass spectrometry interference, and a rhodium internal standard solution and a rhodium internal standard solution are added online to reduce the interference of a sample matrix, sothe method has the advant