Microparticle Composition Analysis Using Comparative Gas Reference

The patent segments the gas introduction process into two distinct segments: sample gas introduction and comparative gas introduction. By dividing the measurement process into separate phases with different gas sources, the system can distinguish between signals from the actual sample and background interference from adsorbed substances on the trapping body.

The patent introduces comparative gas as an intermediary substance that helps identify and quantify background interference. The comparative gas, which has not been in contact with the trapping body, serves as a reference to distinguish adsorbed substance signals from actual sample signals, thereby resolving the interference problem.

The patent merges the sample gas supply system and comparative gas supply system into a single gas introduction mechanism controlled by the control section. By combining these functions and using unified control logic, the system achieves reliable background interference correction without proportionally increasing device complexity.

The patent implements periodic alternation between sample gas introduction and comparative gas introduction. This periodic action allows the system to systematically collect data from both sources in a structured manner, enabling reliable background subtraction while using simple cyclic control rather than complex continuous adjustment mechanisms.