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研究了盐酸羟胺 -草酸 -草酸铵体系提取粘土中游离氧化铁及其测量 ,试验表明 ,用此体系提取粘土中的游离氧化铁 ,其测量结果与 DCB法一致 ,而提取及测量所需的时间却较前者短。相对标准偏差 RSD≤ 2 .0 %。
The extraction of free iron oxide in clay by hydroxylamine-oxalic acid-ammonium oxalate system was studied. The results showed that the free iron oxide in clay was extracted by this system. The measured results are consistent with the DCB method, while the time required for extraction and measurement But shorter than the former. Relative standard deviation RSD ≤ 2.0%.