摘要
试样用硝酸、磷酸溶解,在大量磷酸介质存在下,温度220℃左右时高氯酸将二价锰氧化成三价锰,以N-苯代邻氨基苯甲酸为指示剂,采用硫酸亚铁铵标准溶液滴定三价锰,借此分析氮化锰铁中锰,相对标准偏差小于0.05%。
The sample is dissolved by nitric acid and phosphoric acid. In a lot of phosphoric acid mediator,at about 220℃, perchloric acid is used to oxidize bivalent manganese into trivalent manganese, using N - phenylanthranilic acid as an indicator, the standard solution of ammonium ferrous sulphate is used to titrate trivalent manganese,by which the content of manganese is determined in nitfided ferromanganese, relative standard deviation is less than 0. 05%.
出处
《江西冶金》
2008年第3期32-33,35,共3页
Jiangxi Metallurgy
关键词
氮化锰铁
磷酸介质
高氯酸
nitrided ferromanganese
phosphoric acid mediator
perchloric acid
manganese
