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本文提出了用草酸铵掩蔽硝酸铁溶液中的三价铁,用NaOH标准液直接测定溶液中游离酸的方法。本方法测定快、结果准确。
This paper presents a method of masking ferric iron nitrate solution with ammonium oxalate and directly measuring the free acid in solution with NaOH standard solution. The method of determination of fast, accurate results.