一种间接测定煤中形态硫的新方法  

A New Method for Indirect Determination of Different Chemical State Sulfur in Coal

作　　者：罗道成[1] 易平贵[1] 刘俊峰[1] 李佳秋[1] 

机构地区：[1]湘潭工学院化工系,湖南湘潭411201

出　　处：《实验室研究与探索》2002年第5期92-93,98,共3页Research and Exploration In Laboratory

摘　　要：介绍利用 SO2 -4在 Ba Cr O4溶液中 ,可定量置换出 Cr O2 -4,进行原子吸收光谱法测铬 ,间接测定煤中形态硫的新方法。方法较现行使用的重量法简便、快速 ,干扰少 ,硫含量在 0 .0～ 3.0 mg/L范围内符合比尔定律 ,相对标准偏差小于 3.2 % ,方法的检出限为 1.0× 10 -4g/L。方法用于煤样品分析 ,结果满意。并通过在煤化工实验中的应用 ,效果良好。A new indirect AAS method for determination of sulfur of different chemical state in coal was introduced. The sulfur in the sample is transformed into SO 2- 4 and is reacted with BaCrO 4 to form BaSO 4. The CrO 2- 4 is displaced and the chromium is determined by AAS, and the sulfur content is calculated from the results of chromium determination. Beer's law is obeyed when sulfur content is in the range of 0.0~3.0 mg/L, the RSD is less than 3.2%, and the detection limit of the method is 1.0×10 -4 g/L. The method is rapid, simple and selective as compared with the conventional gravimetric method. It has been applied to the experiment of coal chemical engineering in our department with better results.

关 键 词：间接测定 煤 形态硫 原子吸收光谱法 含量测定 测定方法 煤化工专业 

分 类 号：TQ533.1[化学工程—煤化学工程]