偶氮氯膦Ⅲ-希土极谱络合吸附波的研究  

The Study on the Polarography Adsorptive Complex Wave of Chlorophosphonazo Ⅲ with Rare Earth Elements

作　　者：黄月仙[1] 梁树权[1] 

机构地区：[1]中国科学院化学研究所

出　　处：《分析测试学报》1993年第6期78-81,共4页Journal of Instrumental Analysis

摘　　要：在0.06 mol/L NaAc-HAc pH 4.5的缓冲底液中,偶氮氯膦Ⅲ(CPAⅢ)在-0.25 V(vs.Ag/AgCl)有一良好的微分脉冲极谱还原波,加入希土(RE)后其峰高电流(ip)降低,轻希土浓度在1×10^(-6)～6×10^(-6)mol/L,钇和重希土浓度在2×10^(-7)～3×10^(-6)mol/L范围中,ip的降低与浓度呈线性关系,表明CPAⅢ亦是可用的希土极谱分析试剂。实验证明它们是不可逆的吸附波。In 0.06 mol/L NaAc-HAc buffer solution pH 4.5, chlorophosphonazo Ⅲ (CPA Ⅲ) gives areduction peak at -0.25 V (vs. Ag/AgCl) in differential pulse polarography. The addition ofrare earth elements decreases the peak height of the adsorptive derivative wave. There arelinear relationships between the peak heights and the concentrations of 1×10^(-6)～6×10^(-6)mol/L for lighter or 2×10^(-7)～3×10^(-6)mol/L hearver rare earths and the deereases of peakheights. Experiments showed that they are irreversible adsorptive wave.

关 键 词：偶氮氯膦Ⅲ 络合吸附波 极谱 

分 类 号：O657.14[理学—分析化学]