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| Sulfur determination in fluorite by high frequency combustion infrared absorption method |
| Received:August 08, 2022 Revised:August 25, 2022 |
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| DOI：doi:10.3969/j.issn.2095-1035.2023.05.012 |
| KeyWord:Infrared absorption method; Fluorite; Sulfur |
| Author | Institution |
| Feng Lili |
青岛海关技术中心 |
| WANG Chenglin |
青岛理工大学 |
| Guansong |
青岛海关技术中心 |
| Song Fei |
青岛海关技术中心 |
| Yue Zhenyi |
青岛海关技术中心 |
| ZHANG Qingjian |
中国海关科学技术研究中心 |
| Qi Xiaohua |
中国检验检疫科学研究院 |
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| Abstract: |
| A method for rapid determination of total sulfur in fluorite was established by high frequency combustion infrared carbon sulfur analyzer. The parameters of sample pretreatment were discussed and optimized, such as temperature and time, optimal sampling weight, selection and addition dose of flux. The method of burning at 740 ℃ for 5min was selected to remove the water in the sample. The melting conditions were 0.2g of sample, 0.5g of pure iron, 0.2g of tin particles and 1.6g of tungsten particles. The accuracy of this method is verified by the determination of certified reference materials of fluorite and the comparison with the determination results of standard methods of X-ray fluorescence spectrometry. The standard deviation of this method is between 0.98 and 5.25%. The results show that this method has good accuracy and high precision, and could quickly determine the sulfur content in fluorite. |
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