火焰原子吸收法测定原矿中氧化铜的含量

Determination of Copper Oxide Content in Crude Ore by Flame Atomic Absorption Spectrometry

原矿用1%的亚硫酸钠为抑制剂,经3%的硫酸溶液震荡浸取45min,采用火焰原子吸收法测定震荡后的滤液中氧化铜含量。该方法用于矿样中氧化铜含量的测定,加标回收率在98%~102%之间,测定值的相对标准偏差(n=6)在小于5%之间,测定结果准确可靠.

The crude ore were treated with 1% sodium sulfite as the inhibitor,and were vibrated for 45 minutes by 3% sulfuricacid solution.The content of copper oxide in the filtrate after mechanical shaking treatment was measured by flame atomic absorptionspectrometry.Under the optimumdetermination conditions, the recoveries were in the range of 98%-102%,and the standard relativestandard deviations （n=6） were below 5%.The result was accurate and reliable.