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Kirill S. Gutenev, Michail A. Statkus, Grigory I. Tsizin
Chromatographic
separation of hydrophilic organophosphates on a porous graphitized carbon
sorbent hypercarb using an aqueous solution of formic acid as a mobile phase
Abstract
Abstract. The possibility of elution of hydrophilic organophosphorus substances
using the concentration gradient of formic acid in an aqueous mobile phase on a
porous graphitized carbon sorbent Hypercarb has been studied. The analytes were
detected using a mono quadrupole mass spectrometer. To study the retention of
analytes, the composition of the mobile phase was varied before injection of
the sample solution. It is shown that the effect of stepwise gradient elution
on the retention of analytes is primarily due to the state of the sorbent
surface, rather than the elution ability of the phases, and that the displacing
“quasi-ion exchange” mechanism of retention of analytes is the most likely.
Key words: liquid chromatography, mass spectrometry, porous graphitized carbon
sorbent Hypercarb, alkylphosphonic acids, organophosphate pesticides
Copyright (C) Chemistry Dept., Moscow State University, 2002
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