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GC/CI/MS studies of aldicarb and butocarboxime, two isomeric oxime carbamates
Year:
1983
Authors :
Aharonson, Nadav
;
.
Muszkat, Lea
;
.
Volume :
48
Co-Authors:
Muszkat, L., Pesticide Chemistry and Residue Research Laboratory, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
Aharonson, N., Pesticide Chemistry and Residue Research Laboratory, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
Facilitators :
From page:
323
To page:
326
(
Total pages:
4
)
Abstract:
A direct GC/MS determination of aldicarb[2-methyl-2-(methylthio) propionaldehyde O-(-N-methylcarbamoyl) oxime] and its structural isomer butocarboxime[2-methylthio-O-(-N-methylcarbamoyl) butanone-3-oxime] is reported. Mild GC conditions, using 2% OV-17 as liquid phase provide the lowest extent of degradation. Butocarboxime is analyzed intact as its[M+H]+ ion whereas aldicarb undergoes an on column dehydration, leading to an [M-18]+ fragment with an intact carbon skeleton in the isobutane - Cl mass spectra. The GC/CI of these molecules shows characteristic fragmentation patterns which allow the mass spectrometric distinction between the two isomers. © 1983.
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DOI :
10.1016/0020-7381(83)87093-4
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
29126
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:44
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Scientific Publication
GC/CI/MS studies of aldicarb and butocarboxime, two isomeric oxime carbamates
48
Muszkat, L., Pesticide Chemistry and Residue Research Laboratory, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
Aharonson, N., Pesticide Chemistry and Residue Research Laboratory, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
GC/CI/MS studies of aldicarb and butocarboxime, two isomeric oxime carbamates
A direct GC/MS determination of aldicarb[2-methyl-2-(methylthio) propionaldehyde O-(-N-methylcarbamoyl) oxime] and its structural isomer butocarboxime[2-methylthio-O-(-N-methylcarbamoyl) butanone-3-oxime] is reported. Mild GC conditions, using 2% OV-17 as liquid phase provide the lowest extent of degradation. Butocarboxime is analyzed intact as its[M+H]+ ion whereas aldicarb undergoes an on column dehydration, leading to an [M-18]+ fragment with an intact carbon skeleton in the isobutane - Cl mass spectra. The GC/CI of these molecules shows characteristic fragmentation patterns which allow the mass spectrometric distinction between the two isomers. © 1983.
Scientific Publication
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