摘要
锰的氧化还原滴定法是基于锰是一种变价元素,利用一定的氧化剂还原剂促使锰发生价态变化,从而求得二氧化锰量。试样以盐酸、氢氟酸、磷酸溶解后,在大量磷酸存在下,用高氯酸于220℃左右时将二价锰氧化为三价锰。以N-苯代邻氨基苯甲酸为指示剂,用硫酸亚铁铵标准溶液滴定三价锰,借此测定二氧化锰含量。
The oxidation-reduction titrimetric method for manganese is based on the fact that manganese, a valence-change element, is made to produce valence state change by making use of a certain oxidant and reducing agent, thus to obtain the content of MnO2. After the sample was dissolved with hydrochloric acid, hydrofluoric acid and phosphoric acid, in the presence of a great deal of phosphoric acid, perchloric acid was used to oxidize bivalent manganese into trivalent manganese at about220℃. With N-phenylated anthranilate as the indicator, ammonium ferrous sulfate standard solution was used to titrate trivalent manganese, by which to determine the content of MnO2.
出处
《莱钢科技》
2009年第4期71-72,共2页
Laigang Science & Technology
关键词
喷煤
催化助燃剂
盐酸
磷酸
滴定法
coal powder injection
catalysis combustion-supporting agent
hydrochloric acid
phosphoric acid
titrimetric method
