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Features and Principles of the Corona Charged Particle Detector (CAD)

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Features and Principles of the Corona Charged Particle Detector (CAD)

Here is an example comparing the analysis results of catechin standard solutions using CAD and UV detectors.

The Corona Charged Aerosol Detector (CAD) detects components after they have been separated by HPLC and nebulized, followed by solvent removal. Therefore, volatile substances cannot be detected, but everything else is subject to detection. In CAD, particles are given a charge, and by measuring the amount of that charge, an area value corresponding to the amount of the component is obtained. In the case of a UV detector, the area value can vary significantly depending on the component, even at the same concentration, but in CAD, the difference in area values is about 10%. 1. Non-volatile and semi-volatile substances can be detected even if they do not have UV absorption. 2. Consistent responsiveness is obtained depending on the weight of the substance, allowing for semi-quantitative analysis even without standard samples. 3. High sensitivity detection is possible regardless of chemical structure (detection limits are around several hundred pg to several ng). 4. Gradient analysis is possible.

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Features and Principles of the Corona Charged Particle Detector (CAD) B0259

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