The chemical speciation of ambient VOCs in Beijing city was analyzed by using the method of pre-concentration-GC-MS.
采用预浓缩—GC-MS方法分析了北京市大气中挥发性有机物(VOCs)的组成,共检测出108种,其主要成分是饱和烷烃(33%)、芳香烃(21%)、烯烃(16%)、卤代烷烃(20%)、卤代烯烃(9%)和卤代芳香烃(1%),总VOCs平均质量浓度为(163 7±39 0)μg m3。
The Design of the Control System on Air Testing Preconcentrator;
空气分析预浓缩仪控制系统的设计
Design of Miniature Explosives Preconcentrator
微型爆炸物预浓缩器设计
Determination of Volatile Organic Compounds in Environmental Air by Cryo-concentration/GCMS;
预冷冻浓缩系统与气相色谱-质谱联用测定空气中挥发性有机物
The energy content of the preconcentrate of the example could be increased by the addition of other explosives such as trinitrotoluene
加入其它炸药，例如三硝基甲苯，可使所列举的预浓缩物的能量增加。
Determination of trace anions in hydrogen peroxide by ion chromatography with preconcentration technique
预浓缩技术-离子色谱法测定过氧化氢中痕量阴离子
Determination of Trace Volatile Organic Compounds in Cooking Salad Oil Fume by Preconcentrator-GC-MS
低温预浓缩系统GC-MS联用测定色拉油油烟气中痕量挥发性有机物
Determination of Trace Anions on Surface of Hard Disk Components by Ion Chromatography with Preconcentration
预浓缩技术离子色谱法测定硬盘部件表面痕量阴离子
a reserved ration
预备口粮(紧急时使用的浓缩食品)
evaporating column
【化】浓缩柱, 蒸浓柱
HEWC (Highly Enriched Waste Concentrates )
高浓缩度废物浓缩物
To make(a solution or mixture) less dilute.
浓缩浓缩（溶液或混合物）
The Pretreatment Experiment Study of Reverse Osmosis Concentration of Rare-Earth Ammonium Chloride Waste Water;
反渗透浓缩稀土氯铵废水预处理实验研究
Study on the Pretreatment of Wastewater from the Concentrated Pomegranate Juice Production with Chemical Method
化学法对石榴浓缩汁生产废水预处理研究
Experimental Study on the Reverse Osmosis Concentration Reuse Pretreatment of Rare-earth Ammonium Chloride Waste Water
反渗透浓缩回用稀土氯铵废水预处理实验研究
thick concentrated tomato puree.
稠的、浓缩的番茄浓汤。
Two types of dryer a re used in lecithin processing.
常用浓缩脱水有间歇浓缩脱水和连续浓缩脱水。
condensed milk, soup, etc
炼乳、 浓缩汤等.
These ingredients are blended and concentrated to reduce the water content to some predetermined level.
将这些配料混合并浓缩使其水含量减少到预定的水平。
Determination of Volatile Organic Compounds in Indoor Air Collected in Specially-Prepared Canisters and Analyzed by Gas Chromatography-Mass Spectrometry
预冷浓缩系统与气相色谱—质谱法测定室内空气中挥发性有机物
The 9-fold concentrated extravasate was able to increase the activity of the micro-filtration concentrated broth by 1.01 times.
将浓缩10倍的上清液加入浓缩液中,浓缩液的效价增至原来的2.01倍。
concentrate of essential oils, in fats or fixed oils
蜡中的香精油浓缩物