• 제목/요약/키워드: triazines

검색결과 22건 처리시간 0.021초

Determination of Pesticide Residues in Water using On-line SPE-HPLC Coupling System

  • Lee, Dai Woon;Lee, Sung Kwang;Park, Young Hun;Paeng, Ki-Jung
    • 분석과학
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    • 제8권4호
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    • pp.539-543
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    • 1995
  • The on-line SPE-HPLC coupling system was developed for the efficient separation and determination of trace pesticides, such as phenoxyacetic acids and esters, and triazines in aqueous solutions. By using the developed SPE-HPLC on-line system, the band broadening usually observed in single precolumn switching mode was greatly reduced, consequently, the quantitative determination of trace pesticides could be achieved, Besides, since most of the analytes preconcentrated by SPE column could be injected directly into HPLC system, the limit of detection can be improved down to ppt level.

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GC/MS를 이용한 트리아진 및 페녹시산류의 동시 분석 (Simultaneous Analysis of Triazines and Phenoxyalkanoic Acids by GC/MS)

  • 박송자;김연제;표희수;박경수;박종세
    • 분석과학
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    • 제7권1호
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    • pp.65-78
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    • 1994
  • 제초제로 사용되고 있는 농약 중 트리아진류 7종과 에스텔화된 페녹시산류 9종의 혼합물을 기체 크로마토그래피/질량분석기(GC/MS)를 이용한 선택이온 검출법(SIM)으로 동시에 분리 및 정량하는 방법을 연구하였다. 수질에 잔류하는 농약들을 $CH_2Cl_2$로 추출, 농축 및 유도체화하여 GC/MS/SIM 방법으로 분석할 때 각종 농약류의 정량 농도 범위 0.2~5.0ng/ml에서 직선성이 양호하였고 검출한계는 0.2~0.5ng/ml 범위였다. 또한 이 분석방법을 음용수 또는 생체시료에도 적용 가능하였다.

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1,2,4-Triazine III : 1,2,4-Triazine 유도체의 Methiodide 염 합성과 이들 염의 고리 축소화반응에 의한 1,2,4-Triazole 유도체 합성 (1,2,4-Triazine III : Synthesis of 1-Methyl-1,2,4-triazinium Iodides and Their Ring Contraction Reaction to 1-Methyl-1,2,4-triazoles)

  • 이재근;유향선
    • 대한화학회지
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    • 제33권4호
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    • pp.419-425
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    • 1989
  • 1,2,4-Triazine 유도체들을 acetone 용매하에서 methyl iodide와 반응시켜 다양한 1-methyl-1,2,4-triazinium iodide 염을 합성하였다. 또한 이들 염을 10% NaOH 수용액 내에서 $K_3Fe(CN)_6$로 산화시킨 결과 고리 축소화반응이 일어나 1-methyl-1,2,4-triazole 유도체를 주로 얻을 수 있었으나 $C_6$에 치환기가 없을 경우는 미량이긴 하지만 1,6-dihydro-6-oxo-1,2,4-triazine 유도체도 동시에 얻을 수 있었다. 고리 축소화반응은 $OH^-$에 의해 먼저 pseudo base를 형성하고 이 Pseudo base가 1-methyl-1,2,4-triazole과 1,6-dihydro-6-oxo-1,2,4-triazine으로 진행됨을 확인할 수 있었고 또한 1,2,4-triazine의 3개의 질소원자 중 $N_1$ 원자에 quaternization됨을 확인할 수 있었다.

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Environmental Biosensors for Organochlorines, Cyanobacterial Toxins and Endocrine Disrupting Chemicals

  • Sadik, Omowunmi A.;Ngundi, Miriam M.;Yan, Fei
    • Biotechnology and Bioprocess Engineering:BBE
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    • 제5권6호
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    • pp.407-412
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    • 2000
  • Environmental biosensors and related techniques for monitoring organochlorines, endocrine disrupting chemicals and cyanobacterial toxins are described. The practical requirements for an ideal environmental biosensor are analyzed. Specific case studies for environmental applications are reported for triazines, chlorinated phenols, PCBs, microcystins, and endocrine disrupting chemicals. A new promising approach is reported for microcystins and alkylphenols that utilize electrooptical detection.

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Facile Synthesis of New Pyrazolopyrimidine Derivatives of Potential Biosignificant Interest

  • Aly, Aly A.;El-Karim, Iman A. Gad
    • 대한화학회지
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    • 제55권5호
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    • pp.781-786
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    • 2011
  • An easy and efficient route for the synthesis of some imidazo[1,2-c]pyrazolo[4,3-e]pyrimidines 3-6, imidazo[1,2-c]pyrazolo[4,3-e]triazine 8, pyrazolo[4,3-e]triazolo[1,5-c]pyrimidines 12-15 and pyrazolo-[3',4':4,5]pyrimido[1,6-b]triazines 16, 17 was described through the reaction of readily available 5-aminopyrazole-4-carbonitrile 1 with different reagents. The in vitro antimicrobial activity of some synthesized compounds was examined. Most of the tested compounds proved to be active as antibacterial and antifungal agents.

Bis(morpholine)-substituted 1,3,5-Triazines Derivatives: Synthesis and Structural Study

  • Lee, Jong-Dae
    • 통합자연과학논문집
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    • 제11권2호
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    • pp.61-68
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    • 2018
  • New 4,4'-[6-(o-carboranylalkoxy)-1,3,5-triazine-2,4-diyl]dimorpholine derivatives have been prepared by reacting 4,4'-[6-(alkynyloxy)-1,3,5-triazine-2,4-diyl]dimorpholines with decaborane and N,N-dimethylaniline as base. The intermediate compounds, 4,4'-[6-(alkynyloxy)-1,3,5-triazine-2,4-diyl]dimorpholines, have been prepared by reacting 4,4'-[6-chloro-1,3,5-triazine-2,4-diyl]dimorpholines with prop-2-yn-1-ol, but-3-yn-1-ol, and pet-4-yn-1-ol, and potassium tert-butoxide (t-BuOK) as base. The structure of these compounds has been confirmed by IR, $^1H$, $^{11}B$, and $^{13}C$ NMR and X-ray crystallographic studies.