硫酸钡重量法测定可膨胀石墨中硫  

Determination of sulfur in expandable graphite by barium sulfate gravimetry

作　　者：敦惠娟[1] 赵爱东[1] 周清泽[1] 

机构地区：[1]河北师范大学实验中心

出　　处：《冶金分析》2001年第4期55-56,共2页Metallurgical Analysis

摘　　要：利用酸溶法分解可膨胀石墨样品 ,硫酸钡重量法测定其中的杂质硫。分析结果表明该方法RSD =1 6% ,标准加入回收率在 97 8%～ 99 6%。A gravimetric method for the determination of sulfur cont ent in expandable graphite samples was described Sample was dissolved completely in a mixed acid solutio n,and then the resulting solution was precipitated to produce a bari um sulfate precipitant by adding B aCl 2 solution RSD(n=6)for the proc edure was 1 6% and recoveries were 97 8%～99 6%

关 键 词：可膨胀石墨 硫 重量法 柔性石墨 硫酸钡 密封材料 

分 类 号：O655.2[理学—分析化学]