Determination of available P2O5 in phosphate ore with inductively coupled plasma atomic emission spectrometry .Pretreatment citric acid ex-traction,dry filtered,and the filtrate is determinate by Inductively Coupled Plasma Atomic Emission Spectrometry,compared with the traditional method,this method can be a good way in determination of available P2O5 in phosphate rock,by actual measurement sample,the relative standard deviation compared is low and result accurate.