tlyonlogo
会员中心
您好,请登录, 注册

最近浏览的商品:

0去询价篮结算
询价篮中还没有商品,赶紧选购吧!
当前位置: 首页 > 实验技术 > 离子迁移谱/质谱 > PAIMS便携式离子迁移谱仪用于痕量六氟化硫(SF6)快速检测
文章分类
浏览历史

PAIMS便携式离子迁移谱仪用于痕量六氟化硫(SF6)快速检测


来源: 图拉扬科技  发布日期: 2021-10-08  访问量: 56


离子迁移率谱技术具有高灵敏度(ppb范围)、快速反应(ms范围)、设计紧凑、在大气压下操作以及能够分离异构化合物等优点。在这个简短的报告中,我们展示了IMS对六氟化硫(SF6)的灵敏度和快速反应。...
标签: PAIMS便携式离子迁移谱,GC-IMS,气相离子迁移谱,离子淌度仪,SF6,六氟化硫
 

Low ppb detection of Sulfur hexafluoride (SF6) by Advanced Ion Mobility Spectrometer - PAIMS

PAIMS便携式离子迁移谱用于痕量六氟化硫(SF6)快速检测

The ion mobility spectrometry technique offers advantages like high sensitivity (ppb range), fast response (ms range), compact design, operation in atmospheric pressure and ability to separate the isomeric compounds. In this short report we demonstrate the sensitivity and fast response of IMS for Sulfur hexafluoride (SF6).

离子迁移率谱技术具有高灵敏度(ppb范围)、快速反应(ms范围)、设计紧凑、在大气压下操作以及能够分离异构化合物等优点。在这个简短的报告中,我们展示了IMS对六氟化硫(SF6)的灵敏度和快速反应。

Sulfur hexafluoride (SF6) is an extremely potent and persistent greenhouse gas that is primarily utilized as an electrical insulator and arc suppressant. It is inorganic, colorless, odorless, non-flammable, and non-toxic. SF6 has an octahedral geometry, consisting of six fluorine atoms attached to a central sulfur atom, molar mass of SF6 is 146.06 g/mol.

六氟化硫(SF6)是一种极强的持久性温室气体,主要被用作电绝缘体和电弧抑制剂。它是无机的、无色的、无味的、不可燃的和无毒的。SF6有一个八面体的几何形状,由六个氟原子连接到一个中心硫原子组成,SF6的摩尔质量为146.06g/mol。

In this short Laboratory Report we demonstrate the Custom solution of Ion Mobility Spectrometer operated in sub-atmospheric pressure for detection of SF6 at low ppb level.

在这份简短的实验室报告中,我们展示了在亚大气压下运行的离子迁移谱仪的定制方案,用于检测低ppb水平的SF6。

Experiment
The Customized Portable-Advanced Ion Mobility Spectrometer (PAIMS) was used in this experiment. The instrument was interfaced to external battery and together with external sniffing pump (10L of atmospheric air) was placed to Pelican case as we can see on figure 2. The custom made PAIMS for this application works under extreme operating parameters. The parameters of PAIMS are listed in Table 1.

本实验中使用了定制的便携式先进离子迁移谱仪(PAIMS)。如图2所示,该仪器与外部电池连接,并与外部嗅探泵(10L大气压空气)一起被放置在Pelican箱中。为该应用定制的PAIMS在极端的操作参数下工作。PAIMS的参数列于表1。

 Working pressure工作压力  340mbar
 Working temperature工作温度  120℃
 Drift Gas载气  零级空气
 Drift gas flow漂移气体流量  300ml/min
 Drift field intensity漂移场强  570V/cm
 Sample gas flow进样流量  120ml/min
 Polarity极性  负极

Table1. PAIMS working parameters PAIMS工作参数

The 10mL of SF6 (purity 99.8) was injected to 10mL vial with septa. The considered concentration of the SF6 in vial was 50%.

将10mL的SF6(纯度为99.8)注入带隔垫的10mL小瓶中。考虑小瓶中SF6的浓度为50%。

Figure 2.PAIMS integrated to Pelican Case with battery and external sniffing pump集成户外电源和外部嗅探的PAIMS

Small amount of this mixture (1-2μL) was took from vial and diluted with atmospheric air. In next step was 100 μL of sample was injected to sniffing port of instrument. The sniffing speed was 10L/min. The vapor pressure 2.9 MPa was used for correct calculation of concentration.

从小瓶中取出少量该混合物(1-2μL),用大气中的空气稀释。下一步是将100μL的样品注射到仪器的嗅探口。嗅探速度为10L/min。为了正确计算浓度,使用了2.9Mpa的蒸气压力。

Results and discussion

Figure 3. 10, 60,120, 600 and 6000ppb of SF6 不同浓度范围SF6响应

The IMS response for 10, 60,120, 600 and 6000ppb of SF6 is shown on figure 3. As we can see from this figure, the SF6 results in formation of peak with reduced mobility 1.91cm2.V-1s-1. The smallest concentration that was IMS able to detect was 10 ppb. The highest concentration we tested was 6000ppb.

图3显示了10、60、120、600和6000ppb的SF6的IMS反应。从该图中我们可以看到,SF6的结果是形成了迁移率为1.91cm2.V-1s-1的峰值。IMS能够检测到的最小的浓度是10ppb。我们测试的最高浓度是6000ppb。