Published:Journal of Chromatographic Science,
ISSN 0021-9665Volume
44, Number 3, March 2006, pp. 141-147
Determination and Characterization of the Pyrolysis Products
of Isoprocarb by GC–MS
Xueguang Shao[1], Guoqing Wang[2], Yu’an Sun[2], Rongjie
Zhang[3], Kui Xie[3], and Hongli Liu[3]
[1]Department of Chemistry, Nankai University, Tianjin, 300071;
[2]Department of Applied Chemistry, Zhengzhou University of Light Industry,
Zhengzhou, Henan, 450002; and
[3]Henan Center for Disease Control and Prevention, Zhengzhou, Henan, 450003,
P.R. China
The pyrolysis behavior of isoprocarb (an insecticide with contact
and stomach action) is investigated using pyrolysis-gas chromatography–mass
spectrometry. The pyrolysis products are separated using an HP-5 column under
temperature program with helium as the carrier gas. The total of 80 separated
pyrolysis components at 600°C, 750°C, and 900°C under helium atmosphere
are identified using a probability-based matching search procedure, combined
with the correlation of boiling point (BP) and Lee retention index (RI). Some
of the BP values of the tentative components are estimated using the group contributions
method because experimental values are not available. The levels of the identified
components are estimated by the peak area normalization method from the chromatogram.
It is found that isoprocarb decomposes more with the increase of temperature,
and a large number of mono aromatics and polycyclic aromatic hydrocarbons and
their derivatives are produced when the pyrolysis temperature is higher than
750°C. The content of the decomposition products in the pyrolysate varies
from 0.04% to 22.20%.
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