Dynamic Reaction Cell
Dynamic Reaction Cell - Related Videos
09:16
Reaction Kinetics and Combustion Dynamics of I4O9 and Aluminum Mixtures
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Cited by 3 •
2016
A protocol for measuring flame speeds of a reactive mixture composed of tetraiodine nonoxide (I4O9) and aluminum (Al) is presented. A method for resolving reaction kinetics using differential scanning calorimetry (DSC) is also presented. It was found that I4O9 is 150% more reactive than other iodine(V) oxides.
10:54
Dissolution Dynamic Nuclear Polarization Instrumentation for Real-time Enzymatic Reaction Rate Measurements by NMR
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Cited by 14 •
2016
The sensitivity enhancement provided by dissolution dynamic nuclear polarization (DNP) enables following metabolic processes in real time by NMR and MRI. The characteristics and performances of a dedicated dissolution DNP setup designed for study enzymatic reactions are discussed.
02:20
Dynamic Equilibrium
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2020
A reversible chemical reaction represents a chemical process that proceeds in both forward (left to right) and reverse (right to left) directions. When the rates of the forward and reverse reactions are equal, the concentrations of the reactant and product species remain constant over time and the system is at equilibrium. A special double arrow is used to emphasize the reversible nature of the reaction. The relative concentrations of reactants and products in equilibrium systems vary greatly;...
14:14
Visualization of Cortex Organization and Dynamics in Microorganisms, using Total Internal Reflection Fluorescence Microscopy
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Cited by 12 •
2012
Total Internal Reflection Fluorescence (TIRF) microscopy is a powerful approach to observe structures close to the cell surface at high contrast and temporal resolution. We demonstrate how TIRF can be employed to study protein dynamics at the cortex of cell wall-enclosed bacterial and fungal cells.
07:37
Revealing Dynamic Processes of Materials in Liquids Using Liquid Cell Transmission Electron Microscopy
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Cited by 9 •
2012
We have developed a self-contained liquid cell, which allows imaging through liquids using a transmission electron microscope. Dynamic processes of nanoparticles in liquids can be revealed in real time with sub-nanometer resolution.
FAQs
The selected reaction gas changes the ion population before mass analysis. It promotes ion-molecule reactions that transform or remove polyatomic ions responsible for spectral overlap, while the analyte signal can proceed to the mass analyzer. This chemical filtering is important when an interfering ion has the same nominal mass as the target element, because mass separation alone cannot distinguish that overlap.
Gas flow and cell conditions control how selectively the interference is affected. Adjusting these parameters changes the reaction environment inside the cell, allowing the measurement to target reduction of a particular polyatomic contribution rather than applying an uncontrolled chemical change to the ion stream. Proper control therefore supports more reliable trace-element measurements in chemically complex matrices.
Matrix components can generate polyatomic ions whose nominal mass coincides with that of an analyte. In that situation, the measured signal may contain contributions that are not from the target element. Dynamic Reaction Cell treatment addresses this specific source of spectral overlap, helping trace measurements better reflect analyte-related signal in complex samples.
In a DRC-ICP-MS workflow, ions are directed through the reaction cell after a suitable reaction gas has been introduced. The gas interacts with ions in the path, and the resulting ion population then continues to the mass analyzer. Operators adjust gas flow and cell conditions to control the extent and selectivity of interference reduction.
Choice of application depends on whether matrix components create spectral overlap at the analyte’s nominal mass. The approach is therefore relevant to environmental, clinical, food, and geological materials, where complex compositions can complicate trace-element analysis. Its value is greatest when chemical filtering is needed to improve confidence in elemental results.
Results from this approach are useful when analysts need more than a nominal mass assignment. By reducing spectral overlap before ions reach the analyzer, the measurement can support improved detection limits and accuracy, together with greater confidence in reported trace-element concentrations. These gains matter when sample composition makes direct elemental analysis difficult.