This experiment was conducted to demonstrate the photodetachment analyzer's specialty: analyzing organic compounds on organic substrates. As an example, it analyzes oil contamination on PET. The figure below shows the photodetachment data for PET at room temperature. Since PET consists of double bonds, it has no detachable components. The mass number of interest remains unchanged, and the pressure in the analysis chamber also shows no variation, confirming the absence of detachable components.

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　Figure 1 PET photodetachment data

The figure below shows an example where PET was intentionally contaminated, and the contamination was analyzed. Focusing on m/z 29, the chart for pure PET is compared with that for contaminated PET.
As can be seen here, this enables analysis of organic compounds on organic materials—an analysis previously impossible.


　Figure 2 Comparison Data with Contaminated PET