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研究了铁 (Ⅱ ) 5 Br PADAP 乳化剂OP体系中的析相、显色反应的条件及其吸收光谱的分析特征 ,拟定了直接测定不同种类样品中痕量铁的分析方法。在pH =5 .0的HAC NaAC缓冲溶液中 ,Fe(Ⅱ ) 5 Br PADAP络合物具有两个吸收峰 ,分别位于λ1 =5 6 1nm与λ2 =75 4nm处。本文选择λ =75 4nm进行测定 ,其摩尔吸光系数为 :ε75 4 =3.9× 10 4L·mol- 1 ·cm- 1 。铁含量在 0～ 2 4μg范围内服从比尔定律。此方法用于样品中痕量铁的测定 ,结果准确
The conditions for the phase separation and chromogenic reaction in OP (5) Br PADAP emulsifier OP were studied. The analytical methods for the determination of trace iron in different kinds of samples were developed. The Fe (Ⅱ) 5 Br PADAP complex has two absorption peaks at λ1 = 561 nm and λ2 = 754 nm in HAC NaAC buffer solution at pH = 5.0. In this paper, the determination of λ = 75 4nm determination, the molar absorption coefficient: ε75 4 = 3.9 × 10 4L · mol-1 · cm-1. Beer’s law is obeyed in the range of 0 ~ 24μg. This method is used for the determination of trace amounts of iron in samples with accurate results