Analytical Separations of Schiff Base Chelates by Reverse Phase Hplc on a 10 Micron C-18 Bonded Silica Subtrate

Determination of uranium, iron, copper, and nickel from ore samples by MEKC using N,N′‐ethylene bis(salicylaldimine) as complexing reagent

“…Pasini et al [24] and El-Sonbati [37] have reported the nature of uranyl complex with tetradentate shiff bases including H 2 SA 2 en. Uden et al [38,39] used H 2 SA 2 en for the HPLC separation and determination of copper(II), nickel(II), and palladium(II) using normal and RP modes with LODs in the low nanogram/injection range. The reagent can easily be prepared from simple and inexpensive laboratory chemicals in good yield (90% theoretical).…”

Precolumn chelation with 4-(2-pyridylazo)resorcinol for simultaneous determination of metal ions by liquid chromatography

“…In size-exclusion chromatography (SEC) for the separation of polar, low molecular weight substances, the existence of adsorptive solute-substrate and associative solute-solvent interactions has been recognized previously by several workers (8)(9)(10)(11). Applications of high-performance size-exclusion chromatographic (HPSEC) columns for partition or interactive chromatographic mode by employing mixed solvent of varying polarities have been reported for analysis of a series of aromatic compounds, food additives, and pesticides (12,13).…”

Trace metal determinations by liquid chromatography and fluorescence detection

“…Trace Metal Determinations by Liquid Chromatography and Fluorescence Detection Sir: Liquid chromatography has been applied to the determination of metal ions by use of atomic absorption (1-4) or electrochemical (5,6) detection. In addition, metal chelates have been employed (7)(8)(9). These chelates can be detected by spectrophotometric detectors in the visible or ultraviolet region.…”