Abstract:In this paper, samples were treated with microwave digestion, and the contents of phosphorus and sulfur in plants were determined by inductively coupled plasma-optical emission spectrometry. The optimal microwave digestion conditions were selected for digestion. The minimum detection limits of phosphorus and sulfur were 0.925mg/kg and 1.82 mg/kg, respectively. The precision and relative error were all less than 3%. The recoveries of fresh plant samples were 90.5%~107%, which proved that the method could be used to detect both dry plant samples and fresh plant samples.