動植物および環境中の農薬残留分析法の研究
スポンサーリンク
概要
- 論文の詳細を見る
Gas chromatograph-mass spectrometric (GC-MS), high-performance liquid chromatographic (HPLC) and derivatization methods for the pesticide residue analyses have been developed. GC-MS method was applied to multi-residue analyses of organophosphorus pesticides in crops to tentatively identify the pesticide with common fragment ions which provides information on the elemental content and to determine by characteristic fragment ions of each pesticide. The GC-MS method was also applied to determination of various pesticides in river water. HPLC method was used for simultaneous analysis of thioureas in rat plasma, which are toxic to man. This method was based on cleanup by an Extrelut column and determination with wavelength at 240 nm, and applied to the analysis of ETU which is a degradation product of fungicide ethylenebis (dithiocarbamate) (EBDC). ETU in crops was able to be determined without extensive cleanup procedure. In addition, the stability of ETU in stored samples before analysis was studied. ETU in certain crops decreased with storage time. When L-cysteine hydrochloride (Cys-HCl) was used as an amendment, the degradation rate of ETU decreased. Cys-HCl also prevented degradation of EBDC to ETU during storage and analysis. For the determination of a guanidino fungicide, guazatine triacetate, a derivatization method was developed. Guazatine triacetate was reacted with hexafluoroacetylacetone (HFAA) to form the bis (trifluoromethyl) pyrimidine derivative. However, very low recoveries were obtained in the analysis of samples such as apple and grape. The phenomenon was due to that guazatine triacetate was strongly bound to fructose which is a constituent in apple and grape. To release the bound, guanidine-HCl was found to be the best reagent. Using these method described above, pesticide residues in crops could be detected at ppb or ppt levels.
- 1992-05-20
著者
関連論文
- 酢酸グアザチンとフルクトースのアルカリ溶液中での反応
- 除草剤ACN (quinoclamine)および代謝物の分析法ならびに土壌中における消長
- 動植物および環境中の農薬残留分析法の研究
- C112 新規殺ダニ剤エトキサゾールおよびその代謝物の作物残留分析法
- 自動固相抽出装置および LC-APCI/MS を用いた水中の農薬の多成分分析法
- LC-MS による多成分農薬分析法の玄米試料への応用 - LC-MS 推定のための玄米試料の抽出, 精製操作の検討 -
- 農薬の残留分析
- GC法による作物中残留農薬の簡易同時分析法
- LC-MS による水中の多成分農薬分析法
- D105 新規除草剤 CH-900 およびその代謝物の水稲残留分析法
- 農作物の抽出液中におけるトリフルミゾールおよび代謝物の安定性
- 高速液体クロマトグラフィーによる野菜中の ethylenethiourea の改良残留分析法
- マスクロマトグラフィーによる土壌中の有機塩素系農薬アルドリンおよびディルドリンの定量法
- Guazatine triacetate の残留分析の回収率におよぼす塩酸グアニジンの効果
- 高速液体クロマトグラフィーによる土壌および作物中の Rotenoids の定量法
- マス・クロマトグラフィーによる有機りん剤の多成分残留分析
- Mass Fragmentography による野菜中の 3, 3′-dimethyl-4-methoxybenzophenone (NK-049) の微量分析
- 玄米中におけるグアニジノ殺菌剤(グアザチン)のガスクロマトグラフィーによる定量