[TEM-EDX] Energy Dispersive X-ray Spectroscopy

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It is an analytical method for qualitative and quantitative analysis of organic compounds.

Gas chromatography (GC) is classified as a type of chromatographic method that utilizes differences in the adsorption or distribution coefficients of gases against a stationary phase to separate components. Gas chromatography-mass spectrometry (GC/MS) allows for the qualitative and quantitative analysis of components by using a mass spectrometer to detect the components separated by GC, based on mass information. - Effective for analyzing components with relatively low molecular weights and high volatility - Capable of qualitative and quantitative analysis of trace organic components - Various introduction methods can be selected according to the state of the sample and the purpose - A wide range of organic component structure estimation is possible due to a rich library

basic information

■Sample Introduction Gases or easily vaporized liquids can be directly introduced into the GC. For solids, depending on the analysis purpose, they are dissolved or vaporized using methods such as solvent extraction, pyrolysis, or headspace methods before being introduced into the GC. ■Component Separation The vaporized sample introduced into the sample introduction section is carried by the carrier gas and passes through the column. Due to the varying strengths of interactions with the stationary phase in the column, each component in the sample moves at different speeds, resulting in separation. ■Ionization (EI Method) The molecules of each component separated by the GC are sequentially introduced into the mass spectrometer, where they are ionized by colliding with thermal electrons emitted from a filament. Some of the generated ions (molecular ions) further fragment to produce fragment ions. ■Mass Separation (Quadrupole Type) The generated ions are introduced into a quadrupole mass spectrometer consisting of four rods. By adjusting the voltage applied to the rods, only ions of a specific mass reach the detector, resulting in a mass spectrum containing molecular mass information.

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Applications/Examples of results

- Structural analysis of polymers - Analysis of gas components released during heating - Composition analysis of gases within batteries - Odor analysis - Analysis of additives and impurities in resins - Analysis of residual solvents - Measurement of working environment - Analysis of environmental pollutants (such as VOC analysis)