双显色剂协同显色光度法测定锡

来源 :光谱学与光谱分析 | 被引量 : 0次 | 上传用户：afdwer213

【摘要】

：

在pH 5.0的NaAc-Hac缓冲溶液中,PVA存在时,锡和邻苯二酚紫(PV)与罗丹明B(RhB)生成离子缔合物,其组成为Sn:PV:RhB=1:2:4.缔合物最大吸收波长为560 nm,表观摩尔吸光系数ε＝1.18

【作者】

：

刘文明马卫兴钱保华张明星

【机构】

：

淮海工学院化工系

【出处】

：

光谱学与光谱分析

【发表日期】

：

2004年期

【关键词】

：

锡邻苯二酚紫罗丹明B 协同显色分光光度法

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在pH 5.0的NaAc-Hac缓冲溶液中,PVA存在时,锡和邻苯二酚紫(PV)与罗丹明B(RhB)生成离子缔合物,其组成为Sn:PV:RhB=1:2:4.缔合物最大吸收波长为560 nm,表观摩尔吸光系数ε＝1.18×105 L·mol-1·cm-1.锡量在0～15 μg/25mL范围内符合比耳定律.拟定方法已用于某些样品中微量锡的测定,结果满意.

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双显色剂协同显色光度法测定锡

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