Abstract:

In view of the complex composition of high-iron sphalerite and many interference factors for thedetermination of low-content indium in the ore, a flame atomic absorption method was established to determine the low-content indium in high-iron sphalerite. The detection limit of the method is 0.001 ugmL, and the concentration of indium sample is in the range of 0.01 ~ 10 ug/ml. It represents a linearrelationship with the absorbance value A and the correlation coefficient of the linear equation is 0. 999 93.The recovery rate of different spiked samples is 98. 1% to 101. 4% , and the relative standard deviation ofthe determination results of different content samples is 0. 34% ~0. 84%. The accuracy and precision ofthe method can thus meet the requirements.

Key words:  flame atomic absorption method, high-iron sphalerite: indium, analytical method