Microwave digestion ICP method for simultaneous determination of contents of multiple elements in synthetic rubber

The invention discloses a microwave digestion ICP method for simultaneous determination of contents of multiple elements in synthetic rubber. The method is as below: digesting a sample with nitric acid in a microwave digestion instrument; then dissolving salts in the digestion solution by using mixed acid of sulfuric acid and phosphoric acid; stabilizing the acidity of the sample solution and the standard solution; adjusting the content of matrix to match; and finally preparing a standard solution curve, and choosing a suitable analytical line for measurement in an inductively coupled high frequency plasma atomic emission spectrometer. The invention uses nitric acid for digestion of the sample, so as to replace sample dissolution in mixed acid of nitric acid and hydrofluoric acid in a common ICP-AES method for determination of high temperature alloy; the method avoids corrosion of a quartz sampling system of the inductively coupled high frequency plasma atomic emission spectrometer by hydrofluoric acid, pollution to the instrument, and factors affecting measurement accuracy. At the same time, the invention employs mixed acid of sulfuric acid and phosphoric acid to dissolve salts in the digestion solution, so as to prevent wounding by solution spill and unfavorable factors of deviation measurement.