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

页码：169 / 180

页数：12

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