研究了用硫酸和硝酸溶解样品,防止铁的挥发损失.利用酸效应,在pH 2的氯乙酸-醋酸氨和pH 5～6的乙酸-乙酸钠介质中,分别以磺基水杨酸和二甲酚橙作指示剂,用EDTA标准溶液连续滴定分析样品中铁、锌含量,建立了准确测定铁酸锌中铁、锌含量及铁锌物质的量之比(铁锌比)的方法.对溶样试剂和缓冲溶液的选择、溶液酸度的初调作了讨论分析.本方法用于测定铁酸锌中铁、锌含量及铁锌比的相对标准偏差分别为0.04%、0.21%和0.23%,铁和锌的回收率分别在99.8%～100.3%之间和99.1%～100.3%之间.
By taking advantage of acid effect, an EDTA continuous titration method was developed for the determination of iron and zinc as well as their mass ratio. The sample was dissolved by sulphuric acid and nitric acid to avoid the volatile loss of iron. The determination was conducted in chloroacetic acid-ammonium acetate at pH 2 with sulfosalicylic acid as indicator and in acetic acid-sodium acetate at pH 5-6 with xylenol orange as indicator, respectively. The selection of solvent, buffer solution and the solution pH was discussed. The determination RSDs were: iron, 0. 04 %; fine, 0. 21 % the ratio of iron to zinc, 0. 23 %. The recovery of iron was 99.8% - 100. 3 % and that of zinc 99.1 %-100. 3 %.
参考文献
| [1] | A.M. Alfantazi;R.R. Moskalyk .Processing of indium: a review[J].Minerals Engineering,2003(8):687-694. |
| [2] | S. Calnan;H.M. Upadhyaya;M.J. Thwaites;A.N. Tiwari .Properties of indium tin oxide films deposited using High Target Utilisation Sputtering[J].Thin Solid Films: An International Journal on the Science and Technology of Thin and Thick Films,2007(15):6045-6050. |
| [3] | Leclerc N;Meux E;Lecuire J .Hydrometallurgieal extraction of zinc from zinc ferrites[J].Hydrometallurgy,2003,70(1-3):175-183. |
| [4] | B. Parvatheeswara Rao;K.H. Rao .Distribution of In~(3+) ions in indium-substituted Ni-Zn-Ti ferrites[J].Journal of Magnetism and Magnetic Materials,2005(0):44-48. |
| [5] | 于先进;邱竹贤;赵敏寿 等.高温烧结合成铁锌、铁镍尖晶石[J].黄金学报,1999,1(02):98-100. |
| [6] | Berbenni V;Milanese C;Bruni G;Marini A;Pallecchi I .Synthesis and magnetic properties of ZnFe2O4 obtained by mechanochemically assisted low-temperature annealing of mixtures of Zn and Fe oxalates[J].Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems,2006(2):184-189. |
| [7] | 侯燕,曾兴顺,郭荣钊,仝湘滨.锌-铁合金镀液及镀层中锌、铁的快速测定[J].电镀与精饰,2004(04):35-37. |
| [8] | 陈必友;李启华;梅克力.工厂分析化验手册[M].北京:化学工业出版社,2002 |
| [9] | 刘淑萍;高筠;孙晓然.分析化学实验教程[M].北京:冶金工业出版社,2004 |
| [10] | 蔡成翔.EDTA滴定法试样酸度的初步调节与控制研究[J].广西右江民族师专学报,2005(03):39-44. |
| [11] | 蔡成翔,甘雄.7种不同物质标定EDTA标准滴定溶液的条件控制及误差分析[J].冶金分析,2007(04):65-71. |
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