Abstract：The calibration curve was drawn with potassium sulphate primary reagent as surfur reference material. Consequently, a method for determination of high content sulfur in high sulfur copper magnetite was established by high frequency combustion infrared absorption spectrometry. The experiment was conducted with five different sulfur level samples of surfur mass fraction in range of 0.5%-7%(the mass fraction of sulfur was 7%, 5%, 2.5%, 1.5% and 0.5%, respectively). The optimum experimental conditions were as follows: sample weight was 0.15 g when sulfur mass fraction ranged from 0.5%-3%; sample weight was 0.10 g when sulfur mass fraction ranged from 3%-7%; the adding sequence of sample and flux in crucible was 0.8 g iron chips, sample then 2.0 g tungsten grain. The results showed that there was a good linear relation between sulfur content in range of 0.50-12 mg and its absorbance. The linear regressive equation was y=5 825.5x+415.75, and correlation coefficient was R=0.999 9. Detection limit of this method was 0.036%,and the lower limit of quantitation was 0.14%. The five high sulfur copper magnetite samples with different sulfur level mentioned above were determined parallelly for eleven times by the proposed method. The results were consistent with barium sulfate gravimetry with relative standard deviation (RSD) no more than 5.0%. The repeatability limit was r=0.032 m+0.036, and the reproducibility limit was R=0.040 m+0.053.
张彦甫,蒋晓光,韩峰. 高频燃烧红外吸收法测定高硫铜磁铁矿中硫含量[J]. 冶金分析, 2015, 35(6): 44-48.
ZHANG Yan-fu, JIANG Xiao-guang, HAN Feng. Determination of sulfur in high sulfur copper magnetite by high frequency combustion infrared absorption method. , 2015, 35(6): 44-48.
