摘要
文中提出在pH=10～11时,加入一定量的铁,可使钒尾渣中高倍的钒与六价铬有效分离,然后以二苯基碳酰二肼(DPC)吸光光度法测定六价铬。本法回收率在94%～102%之间,对同一试样的多次重复测定,结果在2.42×10-4%～3.00×10-4%间。方法简单易行,可消除大量钒的干扰。
On the condition of pH=10～11, adding a specific amount of iron will enable six valence chromium to effectively separate from high quantity of vanadium in tailings. Then the six valence chromium can be determined by DPC absorption spectrophotometry. The recovery rate ranges from 94%to 102%. Repeated detection on the same sample gives a result of 2.42×10-6 to 3.00×10-6. The method is convenient to conduct and can exclude the disturbance by a large quantity of vanadium.
出处
《安徽地质》
2002年第1期78-80,共3页
Geology of Anhui
关键词
六价铬
钡的干扰
吸光光度法
six valence chromium
vanadium disturbance
absorption spectrophotometry
