摘要
新显色剂N 烯丙基 N' (4 萘磺酸钠)硫脲(ASNTu)与银在氨性介质中能形成稳定的1∶1棕色水溶性配合物,最大吸收波长在380nm,摩尔吸收系数为4.3×104L.mol-1.cm-1;银量在0～12.5μg/25mL范围内服从比尔定律。此法显色稳定,选择性好,操作简单。用于阳极泥和地质样品中银的测定,均获得满意结果。
In 0.2mol.l^(-1)NH_3.H_2O solution, Ag+reacts with ASNTu to form a 1∶1 stable brown-colored water soluble complex with an apparent molar absorptivity of ε_(380)=4.5×10~4L.mol^(-1).cm^(-1) at 380nm. Beer's law is obeyed in the range of 0-12.5μg/25mL Ag(I).The correlation coefficient is 0.9995. The method has been applied to determination of Ag(I) in anode mud and ore with satisfactory results.
出处
《河南科学》
2004年第5期629-631,共3页
Henan Science
基金
河南省自然科学基金项目(2002120040)
