资料摘要
资料下载The presence of volatile hydrocarbons in urban atmospheres is believed to contribute to the formation of ground-level ozone, one of the main constituents of urban smog. The compounds of interest range in volatility from acetylene (ethyne) to trimethylbenzene, and are generally referred to as ozone precursors. Vehicle emissions are thought to be the main source of these compounds. Recent European and US regulations [1,2] require round-the-clock monitoring of target species in all major urban centers to establish and monitor the link between periods of high traffic density and high pollution levels (key compounds include benzene, toluene, xylene, and buta-1,3-diene). Continuous real-time monitoring provides an insight into emission episodes from local industry, and can be used to monitor the effect of weather conditions such as wind direction, precipitation, and temperature inversion.
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根据标准方法使用 Agilent 5100 SVDV ICP-OES 分析乙醇燃料
简介：数十年来，化石燃料一直是工业应用和运输的主要能源。然而，化石 燃料储量的耗竭、环境污染和经济问题促使人们开发可再生、更廉价 且更清洁的可替代燃料。生物乙醇是其中一种可替代燃料，由植物副 产物中的糖和淀粉组分发酵得到。 不同纯度的生物乙醇均可用作燃料源。水合乙醇燃料未经处理除去 水分，其中含有 93%–96% 的乙醇。它通常用于弹性（弹性燃料）或 双燃料发动机中。无水乙醇经过处理除去水分，具有至少 99% 的纯 度。它能够以最高 25% v/v 的比例与汽油混合。 高纯度燃料在生产、储存和运输过程中可能被元素杂质污染，因此准 确定量分析其中的金属含量非常重要。
安捷伦原子吸收光谱基础培训AA
简介：原子吸收光谱法是一种相对成熟的分析技术。安捷伦原子吸收光谱仪除可提供富有竞争力的通用指标(灱敏度 精密度 稳定性)外，还可额外提供FS(快速序列)、SIPS(梯度混合)、Duo(火焰石墨炉同时分析)、惰性进样系统、可调塞曼磁场、石墨炉分析参数自动优化、超灯等特有技术，帮助您准确、快速地应对分析挑战。
安捷伦原子吸收光谱基础培训AA
简介：原子吸收光谱法是一种相对成熟的分析技术。安捷伦原子吸收光谱仪除可提供富有竞争力的通用指标(灱敏度 精密度 稳定性)外，还可额外提供FS(快速序列)、SIPS(梯度混合)、Duo(火焰石墨炉同时分析)、惰性进样系统、可调塞曼磁场、石墨炉分析参数自动优化、超灯等特有技术，帮助您准确、快速地应对分析挑战。
无需制冷剂、自动化分析采样罐空气和气体
简介：The CIA Advantage is an advanced system for the automated analysis of VOCs in air or gas sampled using canisters. This Application Note describes fi ve CIA Advantage applications, demonstrating the system’s ability to provide excellent analytical performance and versatility.
室内及车舱内空气的监测
简介：Thermal desorption (TD) is a readily automated gas extraction technology based on standard gas chromatography parameters and providing an effi cient, high-sensitivity alternative to conventional solvent extraction. The process of thermal desorption involves the extraction of volatile or semi-volatile organic compounds from a sorbent or material by heating the sample in a fl ow of inert gas. The extracted analytes are then transferred in the fl ow of carrier gas to the analyser (typically GC or GCMS) as a small, discreet and concentrated volume of vapour. In effect the thermal desorber becomes a multipurpose, stand-alone GC injector. Concentration factors as high as 105 - 106 can be achieved using modern systems with analytes collected from several tens, even hundreds, of litres of air being delivered to the analyser in as little as 200 μl of gas.
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