表面活性剂增敏I_3^-间接光度法测定硅灰石和水中锰  

Determination of Manganese in Wollastonite and Water with I - 3 Indirect Spectrophotometry Using Surfactant for Increasing Sensitivity

作　　者：周晓光[1] 洪军[1] 冯桂荷[1] 赵乐 李松田[2] 王万杰 闫永胜[2] 

机构地区：[1]四平师范学院化学系,吉林省四平市136000 [2]平顶山师范高等专科学校,河南省平顶山市467000

出　　处：《光谱实验室》1999年第5期524-527,共4页Chinese Journal of Spectroscopy Laboratory

摘　　要：本文提 出了用铋 酸钠氧化 Ｍ ｎ２ ＋ 为 Ｍ ｎ Ｏ－４ ， Ｍ ｎ Ｏ－４ 氧化 Ｉ－ 为 Ｉ２ 进而生 成 Ｉ－３ ，在 ３５０ｎ ｍ 处 测定 Ｉ－３ 吸光度，间接 测定锰含 量的方法。加 Ｔ Ｐ Ｃ 有明显增敏 和掩蔽作 用，灵敏度 和选择性 好。实测硅 灰石中锰含 量，相对标准偏差（ Ｒ Ｓ Ｄ）为１．５％ ；实测天然水中锰含量 ， Ｒ Ｓ Ｄ 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 increases sensitivity evidently and gets sheltering.Sensitivity and selectity are improved.Mn in wollastonite was determined actually ,relative standard derivation(RSD) is 1.5% .Mn in water was determined actually ,RSD is 1.9%—4.9%,the recovery is 94.2%—106.2%.

关 键 词：硅灰石 水分析 锰 间接光度法 铋酸钠 测定 

分 类 号：O614.711[理学—无机化学] O661.1[理学—化学]