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一、基本考虑等离子炬管是ICP发射光谱分析设备的核心组件。炬管的几何结构和工作参数直接影响着等离子体的各项分析性能,对于炬管的三支气流的通气方式、气流类型及其流量大小也是人们从事该光源研究的一个重要方面。中等功率(1-3千瓦)的ICP分析设备耗氩量通常为11-30升/分。因而分析成本较高,尤其是氩气的生产和使用受到国家和地区的限制,这就促使人们从各种渠道减少耗气量,例如:以廉价的空气或氮气部份取代昂贵的氩;选用耐高温的炬管材料(氮化硼);或改进炬管的几何结构,或用水冷。这些措施都已程度不等地达到了降低氩气消耗的目的,使商品化ICP设备的冷却氩气从18-20升/分降至9
First, the basic considerations Plasma torch ICP emission spectrometry equipment is the core component. The geometry and operating parameters of the torch directly affect the analytical performance of the plasma. The ventilation mode, the type of the airflow and the flow rate of the three airflows are also an important aspect for people to study the light source. ICP equipment for medium power (1-3 kW) typically consumes 11-30 liters / minute of argon. As a result, the cost of analysis is high, and the production and use of argon, in particular, are restricted by countries and regions, prompting people to reduce gas consumption from a variety of sources, for example by replacing expensive argon with cheap air or nitrogen; High temperature torch material (boron nitride); or to improve the torch geometry, or water-cooled. These measures have reached the goal of reducing the consumption of argon gas to some extent, reducing the cooling argon of commercial ICP equipment from 18-20 l / min to 9