研究了注射重量法制备食品添加剂二氧化碳中苯系列气体标准物质的实验方法。
This paper studied the injection weight method, which introduced the preparation of food additives series gas standard materials of benzene in carbon dioxide.
氮中二氧化碳和空气中甲烷气体标准物质属于标准混合气。
The two gaseous Reference Materials, Carbon dioxide in nitrogen and methane in air, belong to standard mixed gases.
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