Abstract:A set of analytical methods for rapid and accurate determination of Cr in low-grade chromite ore was established. After the sample was digested by concentrated nitric acid-sulfur phosphorous mixed acid, Cr in low-grade chromite ore was determined by inductively coupled plasma optical emission spectrometry. The detection limit of this method is low, and the measurement range is wide. The correlation coefficient R in the linear range is 0.999911.The relative standard deviation was 1.99-6.00% and the recovery was between 96.8%-104.8%. The results of the method were consistent and satisfactory. The method is suitable for promotion.