Shanghai Bodong PfeifferMass spectrometer analyzerOmnistarApplication of TPR/TPD in combination for metal surface area testing
The chemical adsorption analyzer TPR/TPD uses the phenomenon of chemical adsorption and desorption of gas molecules or steam molecules to obtain test results. When gas molecules or steam molecules are connected to the solid surface of the sample through chemical bonds, we call it chemical adsorption, and when the chemical bonds are broken, it is chemical desorption. Chemical adsorption can detect specific types of molecules on the surface of the sample.

The program temperature analysis of the device is used to study the properties of metal chemisorbed sites under program-controlled thermal conditions. During TPD testing, under program control, the strength and number of chemisorbed sites can be obtained by monitoring the types of molecules desorbed from the sample surface and measuring the volume of desorbed gas molecules at different temperatures.

Shanghai Bodong Customer Case: A Higher Research Institute in Shanghai
TPR can quantitatively analyze reducible components in samples. This chemical adsorption instrument is connected to Pfeiffer in Shanghai, GermanyMass spectrometer analyzerOmnistar has shown better performance, as the carrier gas can be directly introduced into Omnistar after passing through the sample tubeMass spectrometer analyzerTo determine the molecular weight of reaction products or products after desorption, and thus infer the type of reaction product. After analyzing the test results of the same sample under different temperature conditions, the desorption heat can be calculated.
This chemical adsorption application is used to measure the size of the surface area of active metals attached to the supporting substrate, the dispersion of active metals, and the percentage of active metal content.

AutoChem 2920 adsorption instrument configuration:
1. High temperature furnace temperature range: 40-1100 ℃;
2. Automatic heating speed: 0-50 ℃/min (-70-500 ℃), 0-30 ℃/min (500-700 ℃), 0-10 ℃/min (750-1100 ℃);
3. Adsorbed gases: carbon dioxide, hydrogen, oxygen.

ThisDevice supporting OmnistarMass spectrometer analyzerto configure:
1. Measurement range: 1-200 amu
2. Injection method: atmospheric pressure
3. Heating temperature: 1-200 ℃
4. Capillary material: Quartz


PfeifferMass spectrometer analyzer Collaborating with friendly factories in the UKHiden,U.S.AAmetekMass spectrometerCompared to the main advantages:
1. Whole machine design: The entire mass spectrometer adopts a fully enclosed structure to protect the cleanliness of all components inside the instrument, prevent interference in measurement, and ensure high sensitivity, ensuring that all components are imported from Europe.
2.Mass spectrometer analyzerAdopting gas tight closed ion source, dual filament design, advanced field axis technology and bias technology to ensure low gas release, low gas consumption, low background noise, high signal-to-noise ratio and other advantages.
3. Configure dual diversionTurbomolecular pumpHipace 80, No need to add a bypass exhaust system,Molecular pumpThe speed reaches up to 90000 rpm/min, the highest in the industry
4. Built in platinum micropores, capillary injection system, maximum temperature tolerance of 350 degrees, capable of achieving 5x10-3 mbar vacuum injection
5.Mass spectrometer analyzerBuilt in QuadstarTM software: easy to operate, powerful, and convenient for qualitative and quantitative analysis as well as online and offline analysis.