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0603050319

金虫 (正式写手)

[求助] 粗碲中用ICP测杂质计算出的碲含量与重铬酸钾-硫酸亚铁铵容量法测得的碲含量差5%

楼主做碲提纯实验,提纯出来的碲为金属块状,能用王水完全溶解,用ICP测出来杂质元素(主要是金属)的含量低于500ppm,计算出碲的含量为99.95%以上,而用重铬酸钾-硫酸亚铁铵容量法测得碲含量不到95%,两者差5%左右,请问这种差距是什么原因引起的,哪个数据更准确?
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