Abstract |
The symptoms of acute poisoning caused by ingestion of bialaphos (BIAL), an ingredient of herbicide, are supposed to be due to the L- glufosinate (L-GLUF), which is formed by the degradation of bialaphos. To elucidate the pharmacokinetics of BIAL and L-GLUF, we attempted a simultaneous analysis of BIAL and L-GLUF in biological samples by exploiting a reversed phase HPLC method. The derivatization reaction of BIAL and L-GLUF using (+) -1- (9-fluorenyl) ethyl chloroformate was completed in 30 min at 40 degrees C and both derivatives were stable for 48 hr at 25 degrees C. A fluorescence detector were used for HPLC; the exicitation wavelength was set at 265 nm and the emission wavelength at 315 nm. Respective calibration curves prepared by adding BIAL and L-GLUF to serum were linear within ranges of 0.01-10.0 and 0.005-10.0 microg/mL in derivatived liquid samples for introducing into HPLC. The lower limits of detection for BIAL and L-GLUF were 0.005 and 0.001 microg/mL, respectively. An 83-year old male who ingested approximately 350 mL of Herby Liquid, a herbicide containing 18% BIAL and 82% surfactant, in an attempt to commit suicide developed delayed respiratory depression and seizures. L-GLUF was detected in the serum of the patient 2.7 hr after ingestion, but BIAL was not. The change in serum L-GLUF concentration measured over time was consistent with a 2-compartment model, with a distribution half-life of 1.70 hr and an elimination half-life of 6.03 hr.
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Authors | Mariko Takayama, Hiroshi Sekiguchi, Yasushi Hori, Manami Fujisawa, Yasuo Hirose |
Journal | Chudoku kenkyu : Chudoku Kenkyukai jun kikanshi = The Japanese journal of toxicology
(Chudoku Kenkyu)
Vol. 22
Issue 2
Pg. 113-20
(Jun 2009)
ISSN: 0914-3777 [Print] Japan |
PMID | 19601540
(Publication Type: Case Reports, English Abstract, Journal Article)
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Chemical References |
- Aminobutyrates
- Herbicides
- Organophosphorus Compounds
- bialaphos
- phosphinothricin
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Topics |
- Aged, 80 and over
- Aminobutyrates
(blood)
- Chromatography, High Pressure Liquid
(methods)
- Herbicides
(blood)
- Humans
- Male
- Organophosphate Poisoning
- Organophosphorus Compounds
(blood, metabolism)
- Specimen Handling
(methods)
- Suicide, Attempted
- Time Factors
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