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Characterization and Assessment of the Microjet Electrode as a Detector for HPLC
Author(s) -
Cannan Susan,
Unwin Patrick R.
Publication year - 2004
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200302866
Subject(s) - detection limit , detector , hydroquinone , high performance liquid chromatography , absorbance , electrode , analytical chemistry (journal) , chromatography , chromophore , chemistry , flow injection analysis , materials science , optics , physics , photochemistry , organic chemistry
The microjet electrode (MJE) is characterized as a detector for high performance liquid chromatography (HPLC). Voltammetric measurements of the oxidation of hydroquinone (HQ) allow mass transport to be determined for the MJE detector configuration, and the factors controlling the conversion efficiency of the device to be well understood. The current‐time response to the flow injection analysis of volumes of solution in the 10–80 μL range has been established, and the limit of detection of this method has been determined. The latter was found to approach that of UV absorbance measurements, which is particularly encouraging, given that HQ has a relatively strong chromophore ( ε =2 290.8 cm −1 mol −1 L). This detection system is a robust and simple arrangement with the capability of analyzing large volumes of eluent at typical analytical HPLC flow rates.