If you must call GC, do it during a non-critical or idle phase.

如果必须调用 GC，那么可以在非紧急阶段或空闲阶段实现它。

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Non-methane hydrocarbons in the gas sample are analyzed simultaneously by GC with double columns and double FIDs.

介绍了用双柱双氢火焰离子化检测器同时进样气相色谱法分析气体样品中非甲烷烃。

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Non-volatile organic compounds (NOCs) extracted from raw water and tap water of Hanjiang River and East Lake, Wuhan was analyzed by GC/MS identification combined with resin absorption technique.

应用大孔树脂吸附浓集水中有机物的技术，结合色谱质谱（GC/MS）联机分析方法，对武汉汉江、东湖水源水及其所制成的自来水中非挥发性有机物的化学组分进行了比较研究。

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