摘要
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研究。方法较现行使用的重量法简便、快速 ,干扰少 ,硫含量在 1× 1 0 - 4 ～ 3× 1 0 - 3mg·ml- 1 呈良好线性关系。用于样品分析 ,结果满意。
An indirect AAS method for the determination of sulfur of different chemical state in coal is described in this paper. 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 FAAS, and the sulfur content is calculated from the results of chromium determination. The calibration curve is linear over the concentration range of 1×10 -4 ~3×10 -3 mg·ml -1 for sulfur. The RSD found is less than 3.2%. The proposed method is rapid, simple and selective as compared with the conventional method.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2000年第8期350-351,共2页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
