Determination of carbon and sulfur in iron-containing dust by recycling crucible-different standard calibration-high frequency induction infrared absorption method
LU Yan-rong1, WANG Yi-fei2, ZHANG Jian-jun1, SHI Lin1, DONG Zhen1
1. Technical Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, China; 2. Tianjin University of Technology and Education, Tianjin 300200, China
Abstract：The recycling of materials was a strategic measure of energy conservation and environmental protection. The sample was melt with recycling crucible, and the working curve of different standard calibration were used to solve the problem in lack of standard material for iron-containing dust. The determination of carbon and sulfur contents in various iron-containing dust samples by high frequency induction-infrared absorption method was studied. The effect of experimental parameters on the determination results was investigated and discussed, including the treatment of recycling crucible, the correction methods of working curves by different certified reference material (CRM) and high purity barium carbonate, compensation comparison level and minimum analysis time. It was found that 0.15g of sample could be completely fused by 0.2g of tin and 1.0g of tungsten flux under the optimized experimental conditions. The results showed that the limit of quantification was 0.00022% and 0.00018% for carbon and sulfur, respectively. The contents of carbon and sulfur in iron-containing dust sample were determined according to the experimental method. The relative standard deviations (RSD, n=11) of determination results were less than 3%. The recoveries were between 99% and 102%. The proposed method was applied for the determination of carbon and sulfur in various iron-containing dust samples, and the found results were consistent with the certified values.
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LU Yan-rong, WANG Yi-fei, ZHANG Jian-jun, SHI Lin, DONG Zhen. Determination of carbon and sulfur in iron-containing dust by recycling crucible-different standard calibration-high frequency induction infrared absorption method. , 2020, 40(9): 43-47.
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