trace constituent

[tres kənˈstɪtʃuənt][treis kənˈstitjuənt]

痕量构分

  • Analysis and structure identification of trace constituent in the total ginkgolide by using lc / dad / esi / ms

    银杏内酯提取物中 微量 成分的LC/DAD/ESI/MS分析及结构鉴定

  • Ammonia is an important basic trace constituent in the atmosphere .

    氨是大气中重要的碱性 微量