摘要
硅酸根对Cr(Ⅲ)-茜素红的显色反应在微酸性条件下具有显著的催化作用;本文据此提出了一种测定微量硅的动力学方法。确定了最佳测定条件,在0～42μg/mL Si范围内符合比尔定律。CO_3~2,C_2O_4~2,CN及酒石酸盐干扰测定。用本法测定了铁矿中的硅含量,结果满意。
A Kinetic spectrophotometric method for the determination of trace silicon has been proposed based on the catalytic effect of silicate upon Cr(Ⅲ)-ARS reaction. The optimal conditions were established and the calibration curve is linear for 0～42μg/mL Si. Tartrate,CO_3^(2-) ,CN^-and C_2O_4^(2-) interfere with the determination. The method is used for the determination of silicon in crude iron ore and the results are satisfactory.
出处
《分析试验室》
CAS
CSCD
北大核心
1992年第2期43-45,共3页
Chinese Journal of Analysis Laboratory
关键词
硅
动力学光度法
Silicon determination
Kinetic spectrophotometry
