【摘要】 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 %。更多还原

【Abstract】 The extraction of free iron oxide from clay by hydroxylamine hydrochloride oxalic acid ammonium oxalate system and its determination was studied. The results show that the amount of iron oxide extracted by this method agree with those by DCB method, and the color developing times of 1,10 phenanthroline Fe 2+ in the system is shorter than in DCB method. The relative standard deviation is less than or equal to 2.0%.更多还原