摘要
研究了三元络合物Zn-SCN--RhB的高灵敏度显色反应体系,建立了光度法测定环境水中微量Zn(Ⅱ)的新方法。结果表明,在盐酸介质中,Zn-SCN--RhB络合物的表观摩尔吸光系数ε=2.1×104L.mol-1.cm-1,Zn(Ⅱ)的质量浓度在0μg/10 mL～5μg/10 mL范围内服从比尔定律,Zn2+、SCN-和RhB+三者的络合比为1∶4∶5。具有较高的灵敏度和较好的选择性,试验体系稳定,操作简单快速,可直接应用于环境水中微量锌的测定。
Law Institute of the ternary complex of Zn-SCN--RhB high sensitivity of the color reaction system, the establishment of a new method for the spectrophotometric determination of the environmental trace of Zn （ Ⅱ }. The results showed that in hydrochloric acid, Zn-SCN--RhB the apparent molar absorption coefficient 8=2.1×10^4 L·mol^-l·cm^-1, Zn （II} mass concentration in the 0 μg/10 mL-5 Ixg/10 mLthe law was obeyed in the range and the three complexing ratio of Zn2＋, SCN- and RhB＋ is 1 ： 4 ： 5. This method has high sensitivity and good selectivity for the test system stability, simple operation and fast, can be directly applied to the determination of environmental trace zinc.
出处
《能源与节能》
2012年第11期60-62,共3页
Energy and Energy Conservation
