POSITIVE-ION AND NEGATIVE-ION MASS-SPECTROMETRY AND RAPID CLEANUP OF SOME CARBAMATE PESTICIDES

被引：18
|
作者：
SUZUKI, O [1 ]
HATTORI, H [1 ]
LIU, J [1 ]
SENO, H [1 ]
KUMAZAWA, T [1 ]
机构：
[1] AICHI MED UNIV, DEPT LEGAL MED, NAGAKUTE, AICHI 48011, JAPAN
来源：
FORENSIC SCIENCE INTERNATIONAL | 1990年 / 46卷 / 03期
关键词：
Capillary gas chromatography; Carbamate pesticides; Mass spectrometry (MS); Methomyl; Negative-ion MS; Sep-Pak C[!sub]18[!/sub] cartridges;
D O I：
10.1016/0379-0738(90)90303-G
中图分类号：
DF [法律]; D9 [法律]; R [医药、卫生];
学科分类号：
0301 ; 10 ;
摘要：
Positive-ion electron impact (PIEI), positive-ion chemical ionization (PICI) and negative-ion chemical ionization (NICI) mass spectra of 9 carbamate pesticides are presented. In the PIEI mode, the spectra showed small molecular peaks, intense or base peaks due to M - CH3NHCO + H and peaks at m z 58 due to CH3NHCO. In the PICI mode, peaks due to M + H, M + C2H5, M - CH3NHCO + 2H, CH3NHCO( m z 58) and M-28 appeared. The cations at m z 58 found in both PIEI and PICI modes seem very useful for screening of a carbamate. In the NICI mode, the spectra showed peaks due to M - CH3NHCO and characteristic anions appearing at mass numbers higher than molecular ones, which were probably due to dimerization of [M - CH3NHCO]- followed by hydrogen attachment. Carbamates, which had been added to urine, plasma, whole blood, the liver, kidney and brain, could be rapidly isolated by use of Sep-Pak C18 cartridges with chloroform as an elution solvent. They could be detected by wide-bore capillary gas chromatography with a SPB-5 column, with satisfactory separation from impurities in their underivatized forms. © 1990.
引用
收藏
页码：169 / 180
页数：12
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