Weigh 50 mg of the sample into the digestion vessel. Add 3ml of sulfuric acid,1.5ml of nitric acid and 1.5ml of hydrofluoric acid. Close the vessel and heatin the microwave oven with the following program.Reagents HNO3 65%HF 40%H2SO4 98%Step 1? 2? 3? 4T [°C]? 260? 290 100 100Slop[min] 20? 5? 1? 1Time [min]10? 60? 15? 0