裂解气相色谱-质谱法研究壬酸香草酰胺的热裂解
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摘要
采用在线热裂解/气相色谱-质谱联用技术(Py/GC-MS)对壬酸香草酰胺(PAVA)的热裂解行为进行了研究,在氦气氛围中考察了不同裂解温度和裂解时间对PAVA裂解的影响,通过GC-MS对裂解产物进行定性和半定量分析。结果表明,随着裂解温度的升高,PAVA裂解率快速提高,裂解产物也进一步增多,当裂解温度达到700℃以上时,可裂解出壬酰胺、2-甲氧基-4-甲基苯酚、1-己烯、壬基腈、壬醛等14种产物。同一温度下随着裂解时间的延长,PAVA的裂解率逐步升高,裂解产物发生了进一步的裂解。根据热裂解产物及主要裂解产物的含量变化,初步推断了PAVA的裂解规律。
The pyrolysis behavior of pelargonic acid vanllylamide(PAVA) was investigated by gas chromatography-mass spectmmetry with on-line pyrolysis(Py/GC-MS) in the presence of helium.The influence factors of PAVA pyrolysis behavior such as different temperatures and different time were studied. GC-MS was used for the qualitative and semi-quantitative analyses on PAVA pyrolysis products. The results indicated that pyrolysis temperature had a significant effect on the types and relative contents of pyrolysis products. 14 products were detected when the temperature reached 700 ℃above,including nonanamide,2-methoxy-4-methylphenol,1-hexene,nonanenitrile,nonaldehyde,etc. The pyrolysis rate of PAVA increased gradually with time increasing. According to the pyrolysis products and their contents,the pyrolysis regulation for PAVA was preliminarily dicussed.
The pyrolysis behavior of pelargonic acid vanllylamide(PAVA) was investigated by gas chromatography-mass spectmmetry with on-line pyrolysis(Py/GC-MS) in the presence of helium.The influence factors of PAVA pyrolysis behavior such as different temperatures and different time were studied. GC-MS was used for the qualitative and semi-quantitative analyses on PAVA pyrolysis products. The results indicated that pyrolysis temperature had a significant effect on the types and relative contents of pyrolysis products. 14 products were detected when the temperature reached 700 ℃above,including nonanamide,2-methoxy-4-methylphenol,1-hexene,nonanenitrile,nonaldehyde,etc. The pyrolysis rate of PAVA increased gradually with time increasing. According to the pyrolysis products and their contents,the pyrolysis regulation for PAVA was preliminarily dicussed.
引文
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[3]Vaishnava P,Wang D H.Curr.Med.Chem.-Cardiovascular&Hematological Agents,2003,1(2):177-188.
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