在铁烧结矿与矿石的氧化钙EDTA滴定法快速测定中,我们原以氰化钾作为重金属元素的掩蔽剂,现作了一些改革,用铁坩埚将试样熔融处理后,硝酸(或盐酸)溶解,用三乙醇胺与L-半胱氨酸联合掩蔽Fe~(3+)、Al~(3+)、Mn~(2+)及重金属(如Cu~(2+)、Co~(2+)、Ni~(2+)等),调溶液至pH12后,用EDTA滴定。取消了氰化物的使用,也可不用贵重金属铂坩埚。 In the iron sinter and ore calcite EDTA titrimetric rapid determination, we used to potassium cyanide as a heavy metal element masking agent, is making some changes, the iron crucible after the sample melt treatment, nitric acid (or hydrochloric acid) (3 +), Al ~ (3 +), Mn ~ (2+) and heavy metals such as Cu ~ (2 +), Co ~ (2+) were masked by triethanolamine and L-cysteine, ), Ni ~ (2+), etc.), adjust the solution to pH12, with EDTA titration. Canceled the use of cyanide, but also without the precious metal platinum crucible.