采用大口径石英毛细管柱分析聚合级丙烯中的烃类杂质。
The hydrocarbon impurities in propylene was determined by using big-caliber quartz capillary column.
为了分析聚合级丙烯中的CO和CO2，对SP-3420型气相色谱仪的气路系统作了改装，增加了一个十通阀。
The gas flow path of SP - 3420 gas chromatograph was modified by adding a 10-way switch valve for analyzing micro-amount CO and CO2 in polymer grade propylene.
这家工厂也是一座世界级规模的化工厂，将源源不断地生产成千上万吨聚乙烯、聚丙烯（塑料的基本组成部分）和二甲苯（PX，用于合成聚脂纤维）。
The facility is also a world-scale chemical plant, pumping out thousands of tons of polyethylene and polypropylene, the building blocks of plastic, and paraxylene, which gets turned into polyester.
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