• The structures and compositions of the purified petroleum acids were characterized by using infra-red spectrum, nuclear magnetic resonance and negative-ion electrospray ionization mass spectrum.

    通过红外光谱磁共振负离子喷雾谱三种表征技术鉴定原油中的石油结构组成

    youdao

  • The structures and compositions of the purified petroleum acids were characterized by using infra-red spectrum, nuclear magnetic resonance and negative-ion electrospray ionization mass spectrum.

    通过红外光谱磁共振负离子喷雾谱三种表征技术鉴定原油中的石油结构组成

    youdao

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