过硫酸铵氧化容量法测定矿石中锰方法的改进  

Improvement of Volumetric Method for Determination of Manganese in Rocks by Ammonium Persulfate

作　　者：范福南 

机构地区：[1]甘肃省地勘局第二水勘院金昌办事处,甘肃金昌737100

出　　处：《岩矿测试》2005年第3期235-236,共2页Rock and Mineral Analysis

摘　　要：采用过硫酸铵氧化容量法测定锰时,可在低酸度(0.18mol/LH2SO4、0.29mol/LH3PO4)和大体积(300mL)溶液中氧化Mn2+至Mn7+。所测得的结果十分稳定,回收率为100%。采用管理样分析验证方法,其结果与铋酸钠容量法结果一致。对于w(Mn)=11.36%的试样进行10次分析测定,RSD=0.33%。方法可测定w(Mn)≥0.01%的常见矿种样品。The content of manganese in rocks were determined by using （NH4 ）2S2O8 as fluxing agent to oxidize the Mn^2＋ to Mn^7＋ under low-acidity （0.18 mol/L H2SO4 and 0.29 mol/L H3PO4 ） and large-volume （300 mL） condition. The results from this method are precise and stable with the recovery of 100%. The results from internal standard samples were in agreement with that using NaBiO3 method. The precision of 0.33% RSD （n = 10） was obtained. The established method was suitable for ore samples with w（Mn） ≥0.01%.

关 键 词：锰 低酸度 容量法 

分 类 号：O614.711[理学—无机化学]