By optimizing extracting method,heating procedure,chromatographic temperature,19 polycyclic aromatic hydrocarbons in airborne particulate are detected by gas chromatography/mass spectrometry(GC/MS) with quickness and good sensitiveness.
通过提取方法、升温程序、色谱分离温度、载气流速等的优化,气/质(GC/MS)联用测定大气飘尘所含19种多环芳烃,快速、灵敏,检测限可达到0。
In this work, samples of airborne particulates,vent gas and smog dust during heating and non-heating seasons were collected in the urban and suburban areas of Lanzhou.
本文收集了兰州市区和郊区在取暖期和非取暖期的大气飘尘样品和汽车尾气及烟尘样品。
A rapid and effective method for detecting benzo(a) pyrene in airborne particulates was developed, in which benzo (a) pyrene was extracted in an one minute step with concentrated sulfuric acid from a cyclohexane extracted solution from the airborne particulates, and then determined with a synchronous fluorescent speetrometry.
提出用浓Ｈ２ＳＯ４从大气飘尘样品的环己烧提取液中一次萃取后，用同步荧光光谱测定苯并（ａ）芘的方法。
Determination of Polycyclic Aromatic Hydrocarbons in Airborne Particulate by Gas Chromatography/Mass Spectrometry;
气/质联用测定大气飘尘之多环芳烃
The method to determine the real specific gravity of atmospheric dust by using laser slitdiffraction technology has high precision and is easy to handle.
利用激光单缝衍射技术测量大气飘尘的真比重，具有精度高和测试方法简便易行的特点。
A simple, rapid method for the determination of Pb, Zn, Cu in airborne particulatesby AAS after ultrasonic extraction was described.
本文介绍超声波萃取一原子吸收光谱简易、快速测定大气飘尘中铅、锌和铜的方法。
Particles of dust floated in the air.
尘埃在空气中飘动。
long-range transport of atmospheric pollutants
大气污染物的长程飘移
fine solid particles of ash that are carried into the air when fuel is combusted.
燃料燃烧后飘入空气中的细小固体尘粒。
Atmospheric air-Test dust standard sample-Fly ash
GB/T13269-1991大气试验粉尘标准样品煤飞尘
Atmospheric air-Test dust standard sample-Loess dust
GB/T13268-1991大气试验粉尘标准样品黄土尘
Chimneys discharge smoke into the atmosphere
烟囱将烟尘排入大气层。
Atmospheric air-Test dust standard sample-Simulated atmospheric dust
GB/T13270-1991大气试验粉尘标准样品模拟大气尘
After the explosion dust was suspended in the air.
爆炸後灰尘飘浮於空中。
atmospheric moisture or dust or smoke that causes reduced visibility.
大气的湿气或灰尘或烟尘造成的能见度降低。
Air quality--Determination of benzo(a) pyrene in flying bust--Acetylated paper chromatography fluorescence spectrophotometric method
GB/T8971-1988空气质量飘尘中苯并(a)芘的测定乙酰化滤纸层析荧光分光光度法
removes dust particles from gases by electrostatic precipitation.
通过静电沉淀把大气中的灰尘移开。
Without dust particles existing in the atmosphere, observation would be done more accurately .
如果大气中没有尘埃，观测会更加精确。
airborne particle mass monitor
大气粉尘物质浓度监测仪
All bright and glittering in the smokeless air.
在烟尘未染的大气里粲然闪耀。
A Few Problems about Air Pollution Caused by Dust Dispersion
大气粉尘污染扩散研究中的一些问题