硼镁矿石中全铁含量的分析方法  

Analysis Methods of Total Iron Content in the Boromagnesite

作　　者：王晓东 

机构地区：[1]辽宁核地地质调查院第一实验室,辽宁凤城118100

出　　处：《当代化工》2014年第6期1132-1133,共2页Contemporary Chemical Industry

摘　　要：试样用盐酸加热溶解,在热溶液中,用氯化亚锡还原大部分三价铁,然后以钨酸钠为指示剂,用三氯化钛溶液定量还原剩余部分三价铁,当三价铁全部还原二价铁后,溶液中的二价铁,在硫、磷混酸介质中,以二苯胺磺酸钠为指示剂,用重铬酸钾标准溶液滴定至蓝紫色为终点。Boromagnesite sample was heated and dissolved in hydrochloric acid solution, then most trivalent iron was reduced by stannous chloride, and residual trivalent iron was quantitatively reduced by titanium trichloride with sodium tungstate as indicator. At last, ferrous iron was determined by potassium dichromate standard volumetric solution with sodium diphenylamine sulfonate as indicator.

关 键 词：三价铁 钨酸钠 三氯化钛 重铬酸钾 

分 类 号：O657[理学—分析化学]