Besides, quantitation analysis of involatile compositions in beer could be done by internal standard method or by external standard method.
还可用内标法和外标法对啤酒中的不挥发组分进行定量检测分析。
Introduce the internal pipeline steel structure and characteristic, and analysis the present situation about the internal pipeline steel standard.
简要介绍了国内管线钢的组织分类及其特性要求，并对国内管线钢目前应用标准情况进行了分析研究。
Using methods which headspace analysis with DB-FFAP wide bore capillary column and n-propanol as the internal standard.
采用顶空气相色谱法，用DB - FFAP大口径毛细管柱，以正丙醇为内标进行定量。
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