材料中六氟化硫SF6检测方案(空气发生器)

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图 拉 扬 科 技 有 限 公 司Tlyon SScience &&TechnologyCo.Ltd.TLYONOne source. Infinite solutions电话：400-028-9008 Web：https：//www.tlyon.com E-mail：info@tlyon.com Results and discussion Low ppb detection of Sulfur hexafluoride (SF6) by Advanced Ion Mobility Spectrometer - PAIMS PAIMS 便携式离子迁移谱仪用于痕量六氟化硫(SF6)快速检测 The ion mobility spectrometry technique offers advantages like high sensitivity (ppb range)， fastresponse (ms range)， compact design， operation in atmospheric pressure and ability to separate theisomeric compounds. In this short report we demonstrate the sensitivity and fast response of IMS forSulfur 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 utilizedas 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 centralsulfur atom， molar mass of SF6 is 146.06 g/mol. 六氟化化(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 operatedin 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.t.TTheinstrument was interfaced to external battery and together with external sniffing pump (10L ofatmospheric air) was placed to Pelican case as we can see on figure 2. The custom made PAIMS for thisapplication works under extreme operating parameters. IThe 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 ofthe 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 (1-2u L) was took from vial and diluted with atmospheric air. In next stepwas 100 u L of sample was injected to sniffing port of instrument. The sniffing speed was 10L/min. Thevapor pressure 2.9 MPa was used for correct calculation of concentration. 从小瓶中取出少量该混合物(1-2pL)，用大气中的空气稀释。下一步是将 100p L 的样品注射到仪器的探口。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。 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 thisfigure， the SF6 results in formation of peak with reduced mobility 1.91cm2.V-1s-1. The smallestconcentration 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1.91cm.V's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。 Figure 4..IMS response for different SF6 concentration Figure 4 shows calibration plot of IMS response for 10， 60，120，600 and 6000ppb of SF6. The MaSaTECHsoftware allow calculation of peak volume， peak area， averaged peak area along the monitoring time aswell like peak intensity and averaged peak intensity along the monitoring time. The SF6 peak Intensitywas used in calculation. The Generalized Logistic Fitting with R2=0.999 was chosen as an optimal forcalculation. Considering 3x noise level we reached limit of detection for SF6 at value 10 ppb. 图4显示了10、60、120、600和6000ppb 的 SF6 的 IMS反应校准图。MaSaTECH 软件可以计算峰体积、峰面积、监测时间内的平均峰面积以及峰强度和监测时间内的平均峰强度。计算中使用了 SF6 的峰值强度。选择R2=0.999.的广义 Logistic 拟合作为最佳计算方法。考虑到3倍的噪音水平，我们达到了 SF6 的检测极限，数值为10ppb。 Conclusion In this short laboratory report we demonstrate the ability of PAIMS to detect SF6 at low ppb concentration.The LOD for SF6 was 10ppb. We are also demonstrating possibility of our Advanced IMS to work undernon-standard conditions ((320mbar，120℃) required for successful detection of SF6 at low ppbconcentration. 在这份简短的实验室报告中，我们展示了 PAIMS 检测低 ppb 浓度的 SF6 的能力。SF6 的 LOD 为 10ppb。我们还展示了我们的高级 IMS 在非标准条件下(320mbar， 120℃)成功检测低 ppb浓度的 SF6 的可能性。 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。