Continuum source atomic fluorescence detector for liquid chromatography

Abstract

A preliminary study of interfacing of a high pressure liquid chromatography instrument with a continuous source atomic fluorescence detector is reported. The chemical system investigated is the acetylation reaction of ferrocene by acetic anhydride. The retention data from the conventional UV molecular absorption detector are in excellent agreement with those obtained using the atomic fluorescence detector monitoring the iron fluorescence signal. The metal-containing compounds are more easily quantitated with the fluorescence detector, both because it does not respond to purely organic interferants co-eluting with the compounds of interest and because the integrated response is insensitive to the chemical form of the compound.High pressure liquid chromatography (HPLC) detectors have been reviewed by several authors (1-7). Detectors based on refractive index, UV or visible light absorption, heat of absorption, electrical conductivity, flame ionization and

Metal Cation/Anion Speciation via Paired-Ion, Reversed Phase HPLC with Refractive Index and/or Inductively Coupled Plasma Emission Spectroscopic Detection Methods

“…In the recent past, others have briefly reported on the use of such approaches for the separation of various cations and anions, but such work was most often not interfaced with the latest advances in ICP detection. That work which has used ion-exchange HPLC and/or chelation chromatography has generally used conductivity detection, atomic absorption spectroscopy, and/or electrochemical detection (8)(9)(10)(11)(12)(13)(14)(15)(16)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35)(36)(37)(38)(39). Very little work has been described with regard to metal cation or anion separations via conventional reversed phase HPLC interfaced with ICP detection.…”

“…Obviously, the final speciation of metals in a complex sample matrix, often in the presence of other metals and their species, must involve some sort of an initial separation process. Considerable attention has been devoted in recent years towards the HPLC separation and detection of various metal species, usually employing UV, AA, ICP, or electrochemical detection (8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31). Initially, HPLC was applied to the separation and identification of mainly organometals and/or metal chelates/complexes.…”

Inductively coupled plasma mass spectrometric detection for multielement flow injection analysis and elemental speciation by reversed-phase liquid chromatography

“…The multielement detectors that have been tried in combination with LC are atomic fluorescence spectrometry (25,26) and atomic emission spectrometry (AES) with the microwave induced plasma (27), direct current plasma (11,12,14,28), and inductively coupled plasma (ICP) (8)(9)(10)13,24,29). As yet, none of these techniques for LC detection have seen much use outside analytical research laboratories largely because few of them have exhibited adequate powers of detection.…”