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本文研究了噻唑偶氮邻苯二酚与Fe(Ⅱ)的显色反应,测定了络合物组成、摩尔吸光系数和稳定常数。结果表明在pH7—9.5、聚己二醇辛基苯基醚存在下,形成蓝紫色络合物,其最大吸收峰位于586nm,络合物的摩尔吸光系数为9.6×10~4,是目前测定Fe(Ⅱ)灵敏度较高的显色剂。利用上述显色反应拟定了测定方法,用于生物及环境等样品中微量铁的测定,获得满意的结果。
In this paper, the color reaction of thiazoly azocarbanol with Fe (Ⅱ) was studied. The complex composition, molar absorptivity and stability constants were determined. The results show that at pH7-9.5, polycaprolactone octylphenyl ether in the presence of the formation of blue-violet complex, the maximum absorption peak at 586nm, the molar absorption coefficient of the complex was 9.6 × 10 ~ 4, is currently measured Fe (Ⅱ) high sensitivity of the developer. The colorimetric reaction was used to prepare the determination method for the determination of trace iron in biological and environmental samples to obtain satisfactory results.