【摘要】 本文研究了四-(4-三甲铵苯基)卟啉微分分光光度同时测定痕量Cu(Ⅱ)、Zn(Ⅱ)的方法,灵敏度高,表观微分摩尔吸光系数分别达7.8×10~5和1.26×10~6。方法选择性好,操作简便,可用于水样、纯硝酸、盐酸和纯稀土试样中痕量Cu(Ⅱ)、Zn(Ⅱ)的测定。更多还原

【Abstract】 Copper （Ⅱ） and zinc（Ⅱ） can form stable complexes with meso tetrakis（4-trimethylammo niumphenyl）-porphine within 6 min in pH 4.5 HAc-NaAc buffer at 100℃. The fourth-order derivative spectrum has been chosen to eliminating the interference caused by the overlap of normal absorption spectra, and thus the two elements can be determined simultaneously. The apparent molar absorption coefficients for copper （Ⅱ）and zinc （Ⅱ）are 7.8×10⁵ and 1.26×10^? respectively.Trace amounts of Cu（Ⅱ） and Zn（Ⅱ） in samples of pure HCl, HNO₃, water and pure rare earths have been examined.更多还原