需要在低质量下需要高分辨率的应用

High-resolving power at low masses is required in several critical applications in the industrial and academic sectors. These include the determination of hydrogen isotopes in the presence of helium such as⁴He /D₂以及在存在氮的情况下的CO（n₂）。Only 0.0033 amu is the mass difference between D₂and⁴他。

图1。MAX-50 Probe

Quadrupole Mass Spectrometers

市场上商业上可用的许多四极质谱仪仪器无法解决如此紧密孤立的质量。Extrel在四极杆开发和复杂的制造方法方面拥有超过五十年的专业知识，并且能够显示常规，高分辨率，高稳定性性能，具有高级最大四分之一四极质量光谱仪，配备了2.9 mm的TRI滤波器质量滤波器，配备了2.9MHz RF电子设备（图1）。

MAX-50可以独立处理各种UHV应用程序，例如地年代学，TPD和高分辨率SIMS。与Extrel的应用程序匹配时VeraSpec HRQ gas analysis systems,the measurement field is expanded to cover a broad range of gas analysis applications up to atmospheric pressure. The high-resolution MAX-50 is part of the MAX-QMS Series of quadrupole instruments.

图2显示了使用含有2.9 MHz电子设备的传统最大50生产仪器确定的光谱，19 mM三滤器质量过滤器，带有转换代码的阴性/正离子脉冲计数乘数以及带有双重托管虹膜丝的轴向电子冲击电离。

High Resolution Power at Low Masses

Analysis of Carbon, Nitrogen, Oxygen, Argon, and Sulfur isotopes are areas of interest in geochemistry. Figure 2 depicts the usual resolution performance determined at m/z=40 and shows the top end resolution. Systems developed by Extrel have a resolution of at least 3000 FWHM at 40 m/z. With careful tuning, users are able to push these limits.

图2。Argon mass 40 showing a resolution of 4001 = M/ΔM

低质量的分辨率表现如图3所示。在UHV室内进行了测量，其中将10 ppm氘的混合物和10 ppm的UHP UHP氦在UHP Argon中稀释到5 x 106 TORR的压力，并显示为5 x 106 TOR。优秀的特性，例如基线分离和峰形。

图3。Separation of helium at 4.002 amu and D₂at 4.028 amu.

In high-resolution experiments, peak stability is debatably as significant as anything else. When analytes are separated, just a few thousandths of an amu apart, it is necessary to get an accurate reading of the mass position. N₂（（MW=28.019) and CO (MW=28.008) are one of the toughest pairs of compounds to examine at the same time. However,Extrel的Max-50四杆仪器can separate and differentiate both peaks to over a 30% valley (Figure 4).

Figure 4.CO和N的分离₂在质量28处。可以轻松区分仅0.011 AMU的两个重叠组件。

来自Extrel的高分辨率QMS四极系统也用于同位素分析。除了分裂D₂而且，他还在核研究设施中研究了氢同位素。图5显示了双原子氢和⁴他，³他，and D₂。

Figure 5.Isotope analysis of H, H₂，，，，³他和⁴他。插图显示质量4时氦和氘的基线分离。

Conclusion

Extrel provides exceptional capabilities for high-resolution, low mass analysis, abundance-sensitivity characteristics, and unique resolution and transmission, which are not seen in any other commercially available quadrupole mass spectrometers.Extrel’s MAX-50 instrumentcan be utilized as a probe based MS system, a turnkey standalone VeraSpec HRQ system, or can be integrated into any current VeraSpec system.

此信息已从Extrel CMS，LLC提供的材料中采购，审查和调整。欧洲杯足球竞彩

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