Highly selective determination of trace amounts of copper(II), nickel(II) and vanadium(V) ions with tetradentate schiff-base ligands by reversed-phase high-performance liquid chromatography and spectrophotometric detection
Highly selective determination of trace amounts of copper(II), nickel(II) and vanadium(V) ions with tetradentate schiff-base ligands by reversed-phase high-performance liquid chromatography and spectrophotometric detection
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DOI：
10.1016/s0021-9673(01)94596-0
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发表时间：
1987
影响因子：
4.1
通讯作者：
M. Kanbayashi;H. Hoshino;T. Yotsuyanagi
中科院分区：
文献类型：
--
作者：
M. Kanbayashi;H. Hoshino;T. Yotsuyanagi
在洗脱液中不加显色剂的情况下，用反相高效液相色谱法和分光光度法实现了对痕量金属离子的高选择性测定。合成了六种四齿席夫碱配体，均为N，N‘-邻苯二胺(PBS)衍生物，并与金属离子发生了反应。这些试剂对Al3+、Cr3+、Fe3+、Ga3+、Mn2+、Mo6+和Zn2+等11种金属离子中的Co2+、Cu2+、Ni2+和V5+具有较高的选择性。通过对衍生金属的高效液相色谱分离，建立了高灵敏、高选择性的痕量铜、镍、钒的光度分析方法。例如，4，4‘-二-N，N-二乙基-PBS适用于痕量V5+的测定。在该体系中，V~(5+)离子可以在ppb水平上选择性地测定，而不需要任何初步的浓缩和分离。在信噪比为2时，V5+离子的检出限为6·10−9mol/L(0.3ppb)。
The highly selective determination of trace amounts of metal ions by reversed-phase high-performance liquid chromatography (HPLC) and spectrophotometric detection has been accomplished without the addition of a chromogenic reagent to the eluent. Six tetradentate Schiff-base ligands, all N,N′-o-phenylenebis(salicylaldimine) (PBS) derivatives, were synthesized and made to react with the metal ions. These reagents have a high selectivity towards Co2+, Cu2+, Ni2+and V5+ions among eleven metal ions (these plus Al3+, Cr3+, Fe3+, Ga3+, Mn2+, Mo6+and Zn2+). By chromatographing the derivatized metals in the HPLC system, highly sensitive and selective spectrophotometric methods for trace amounts of Cu2+, Ni2+and V5+have been established. For example, 4,4′-di-N,N-diethyl-PBS was suitable for the determination of trace amounts of V5+. In this system, the V5+ion can be determined selectively at the ppb level without any preliminary concentration and separation. The detection limit of the V5+ion was 6 · 10−9mol/l (0.3 ppb) at a signal-to-noise ratio of 2.