摘要
提出了用铋酸钠氧化Mn^(2+)为MnO_4^-,MnO_4^-氧化I^-为I_2进而生成I_3^-,在350nm处测I_3^-吸光度,间接测定锰含量方法。加入TPC有明显增敏和掩蔽作用,灵敏度和选择性较好。实测硅灰石中锰含量,相对标准偏差(RSD)为1.5％;实测天然水中锰含量,RSD为1.9％～4.9％,回收率为94.2％～106.2％
In this paper the method that the concentration of Mn was indirectly determined was set up. Here Mn^(2+) was oxided by Na_2BiO_3 to MnO_4^- and I^- was oxided by MnO_4^- to I_2 then to I_3^-, the absorption of I_3^- was determined at 350nm. Adding TPC evidently increases sensitivity and has sheltering. Sensitivity and selectity are better. Mn in silica was actually determined, relative deviation (RSD) is 1.5%. Mn in water was actually determined, RSD is 1.9%～4.9%, the recovery is 94.2%～106.2%.
出处
《河北化工》
1993年第4期60-62,共3页
Hebei Chemical Industry
关键词
锰
间接光度法
铋酸钠
碘酸根
水
I_3-
manganese
indirecs spectrophotometry
sodium bismuthate
